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RESISTANCE TRAINING PRESCRIPTION FOR ATHLETES DURING PERIODS OF PLANNED DE-LOADING: A SURVEY OF STRENGTH AND CONDITIONING COACHES 运动员在计划减负荷期间的阻力训练处方:对力量与体能教练的调查
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.355
Ms Kristen De Marco, Dr Paul Goods, Dr Kate Baldwin, Dr Daniel Hiscock, A. P. B. Scott
Implementing resistance training (RT) for athletes may be difficult during some training-phases due to competing demands. However, it is currently unknown how strength and conditioning coaches prescribe RT during periods of planned de-loading. Therefore, we aimed to investigate the RT prescription practices of coaches during four common de-loading periods (taper, competitive season, tournament, travel). An anonymous online survey was shared globally to coaches, with data analysed from 204 responders (current level of athlete coached: world class n=68, elite/international n=62, highly-trained n=64, trained n=10). Coaches only provided answers about prescription for de-loading periods which they reported encountering. Where a coach indicated not prescribing RT for specific de-loading periods, they provided information on any barriers preventing RT prescription. Weekly RT prescription across all de-load periods was typically reported as: 1-2 sessions, 30-60 min, 1-3 sets, 1-6 repetitions. Most coaches reported decreasing volume during all periods (taper: 89.1%, competitive season: 70.4%, tournament: 84.1%, travel: 74.6%), with the most common reduction in RT volume reported as 0-25%. Most coaches also decreased intensity during a taper (52.9%), tournament (54.8%) and travel (53.6%), with a 0-25% reduction most common. ‘Lack of equipment and facilities’ and ‘scheduling/time’ were common barriers cited to RT prescription during the competitive season (100% for scheduling/time), tournament (55.6% and 50.0%), and travel (57.3% and 60.0%). During a taper, ‘recovery’ was the most reported reason (41.7%). During planned de-loading periods, both training volume and intensity are generally decreased by coaches compared to periods of normal training. The similarity of barriers to RT prescription during de-load periods suggests the experiences of coaches are not influenced by the phase. To address barriers experienced by some coaches, researchers should examine the use of alternative RT strategies for periods of planned de-loading to maintain training stimulus.
在某些训练阶段,由于竞争的需要,运动员可能很难进行阻力训练(RT)。然而,目前尚不清楚力量与体能教练在计划减负期间如何规定阻力训练。因此,我们旨在调查教练在四个常见减负期(减量期、竞技赛季、锦标赛、旅行)的 RT 处方实践。 我们在全球范围内向教练员发放了一份匿名在线调查问卷,并对 204 名回复者(目前教练的运动员水平:世界级 68 人,精英/国际级 62 人,高度训练 64 人,训练有素 10 人)的数据进行了分析。教练只回答了他们报告遇到的去负荷期处方。如果有教练表示没有在特定的减重时间段开具 RT 处方,他们会提供有关阻碍开具 RT 处方的任何障碍的信息。 据报告,所有减负期的每周 RT 处方通常为1-2 次训练,30-60 分钟,1-3 组,1-6 次重复。大多数教练报告在所有时期都减少了运动量(减量期:89.1%;竞技赛季:70.4%;锦标赛:84.1%;旅行:74.6%),最常见的 RT 运动量减少率为 0-25%。大多数教练还在减量期(52.9%)、比赛期(54.8%)和旅行期(53.6%)降低了运动强度,其中 0-25% 的降幅最为常见。缺乏设备和设施 "和 "时间安排/时间 "是竞技赛季(100%为时间安排/时间)、锦标赛(55.6% 和 50.0%)和旅行(57.3% 和 60.0%)期间 RT 处方的常见障碍。在减量期间,"恢复 "是报告最多的原因(41.7%)。 与正常训练期间相比,在计划的减负期间,教练员通常会减少训练量和强度。在减负期,RT 处方的障碍相似,这表明教练员的经验不受阶段的影响。为了解决一些教练遇到的障碍,研究人员应研究在计划减负期使用其他 RT 策略来维持训练刺激。
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引用次数: 0
ADHERENCE TO PRESCRIBED EXERCISE AND CLINICAL OUTCOMES IN PEOPLE WITH CHRONIC NONSPECIFIC LOW BACK PAIN: A SYSTEMATIC REVIEW AND META-ANALYSIS 慢性非特异性腰背痛患者坚持处方运动和临床疗效:系统回顾和荟萃分析
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.360
Andrew Bastianon, Dr Lianne Wood, Mr Yannick Gilanyi, Mr Harrison Hansford, Dr Mitchell T. Gibbs, Prof Sarah Dean, Prof Nadine Foster, Dr Jill Hayden, Matthew D Jones
Exercise is widely accepted as a first-line treatment for chronic non-specific low back pain (CNSLBP). However, the benefits of exercise diminish over time, as does adherence to exercise. It is unclear whether greater exercise adherence is associated with improvements in pain intensity (PI) and functional limitation (FL). We explored the relationship between exercise adherence and patient-reported outcomes in people with CNSLBP. We conducted a secondary analysis of the Cochrane systematic review, ‘Exercise therapy for chronic low back pain’, using a subset of 24 trials that measured exercise adherence compared to usual care. Random-effects meta-analysis was performed in R for PI and FL at the closest time point post-intervention. We used predefined subgroups of exercise adherence of ‘Good’ (90-100%), ‘Moderate’ (70-89%), or ‘Poor’ (14-69%) adherence. We used the risk of bias judgements provided by Cochrane. All trials included were deemed low risk of bias. Compared to usual care, ‘Good’ adherence was associated with reduced PI by 17.83 points on a 100-point scale (95% CI -26.23 to -9.43; I2 = 81.7%) and FL by 9.69 points on a 100-point scale (95% CI -12.64 to -6.74; I2 = 18.9%). ‘Moderate’ adherence was associated with reduced PI by 6.93 points (95% CI -10.43 to -3.44; I2 = 18.3%) and FL by 3.80 points (95% CI -6.10 to -1.49; I2 = 0%). ‘Low’ adherence was associated with reduced PI by 7.50 points (95% CI -19.83 to -4.84; I2 = 89.7%) and FL by 3.35 points (95% CI -10.45 to -3.74; I2 = 82.7%). Greater adherence to exercise is associated with greater improvements in PI and FL in adults with CNSLBP. Further research is needed to understand the causal effect of adherence on patient-reported outcomes. Better reporting of this potentially important exercise parameter in randomised trials is also needed.
运动被广泛认为是治疗慢性非特异性腰背痛(CNSLBP)的一线疗法。然而,随着时间的推移,运动的益处会逐渐减少,坚持运动的程度也是如此。目前尚不清楚坚持锻炼是否与疼痛强度(PI)和功能限制(FL)的改善有关。我们探讨了中枢神经系统慢性阻塞性脑病患者坚持锻炼与患者报告结果之间的关系。 我们对 Cochrane 系统综述 "慢性腰背痛的运动疗法 "进行了二次分析,使用了 24 项试验的子集,这些试验与常规护理相比,对运动依从性进行了测量。在 R 中对干预后最近时间点的 PI 和 FL 进行了随机效应荟萃分析。我们采用了预先设定的运动依从性亚组,即 "良好"(90%-100%)、"中等"(70%-89%)或 "较差"(14%-69%)依从性。我们采用了 Cochrane 提供的偏倚风险判断。 所有纳入的试验均被认为偏倚风险较低。与常规护理相比,"良好 "依从性与 PI 下降有关,按 100 分制计算,PI 下降 17.83 分(95% CI -26.23 至 -9.43;I2 = 81.7%),按 100 分制计算,FL 下降 9.69 分(95% CI -12.64 至 -6.74;I2 = 18.9%)。中度 "依从性与 PI 降低 6.93 分(95% CI -10.43 至 -3.44;I2 = 18.3%)和 FL 降低 3.80 分(95% CI -6.10 至 -1.49;I2 = 0%)有关。低 "坚持率与 PI 下降 7.50 个点(95% CI -19.83 至 -4.84;I2 = 89.7%)和 FL 下降 3.35 个点(95% CI -10.45 至 -3.74;I2 = 82.7%)有关。 对于患有 CNSLBP 的成年人来说,更坚持锻炼与 PI 和 FL 的改善幅度更大相关。要了解坚持锻炼对患者报告结果的因果效应,还需要进一步的研究。还需要在随机试验中更好地报告这一潜在的重要运动参数。
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引用次数: 0
NEAR MAXIMAL VELOCITY SPRINTS ARE RARE, BUT HIGH-INTENSITY ACCELERATIONS OCCUR FREQUENTLY DURING INTERNATIONAL MALE FIELD HOCKEY 接近最大速度的短跑很少见,但在国际男子曲棍球比赛中,高强度的加速跑却经常出现
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.329
Dr Paul Goods, Dr Brendyn Appleby, A. P. B. Scott, Prof Peter Peeling, Dr Brook Galna
In team sport, high-intensity running is generally used to describe velocities associated with maximal aerobic speed, with sprints defined by near maximal velocities, which are considered important to team sport performance. However, recent team sport investigations have revealed that near maximal velocities are seldom attained, but high-intensity accelerations occur frequently and may better represent the most demanding aspects of team sport match play. Field hockey research in this area is lacking, and therefore, we aimed to explore the frequency of high-intensity accelerations in elite field hockey, and how often these accelerations resulted in the attainment of sprint velocities. Movement data were collected during 2023 across 3 tournaments (17 matches) from 27 members of the Australian male field hockey team (totalling 266 player matches). Duration, high-intensity accelerations (>2.5m.s-2 for >1s), sprints (>7m.s-1), and repeated high-intensity efforts (≥3 accelerations or sprints with ≤45s recovery between efforts) were extracted. Mixed effects models were used to estimate the mean for each outcome (fixed effect), with random intercepts modelled for player and match. Players were active for 51min and completed 42 high-intensity accelerations per match, which lasted for 3.6s, covered 12.9m, and reached a peak velocity of 4.8m.s-1. Only 6.4% of high-intensity accelerations resulted in the attainment of sprint velocity (2.5 per match), and these efforts lasted for 6.1s, covered 35.6m, and reached a peak velocity of 7.5m.s-1. Players completed 4.5 bouts of repeated high-intensity accelerations per match, which comprised 3.7 efforts per bout, interspersed with 16.4s of recovery; however, no repeated-sprint bouts were observed. High-intensity accelerations occur frequently in field hockey; however, these rarely result in the attainment of sprint velocities. Practitioners should consider monitoring high-intensity accelerations to ensure players are being adequately prepared for competition demands.
在团队运动中,高强度跑步通常被用来描述与最大有氧速度相关的速度,冲刺则被定义为接近最大速度,这被认为对团队运动成绩非常重要。然而,最近的团队运动调查显示,接近最大速度很少达到,但高强度加速却经常出现,这可能更好地代表了团队运动比赛中要求最高的方面。曲棍球运动缺乏这方面的研究,因此,我们旨在探索精英曲棍球运动中高强度加速的频率,以及这些加速达到冲刺速度的频率。 我们在 2023 年期间收集了澳大利亚男子曲棍球队 27 名队员(共 266 场比赛)在 3 场锦标赛(17 场比赛)中的运动数据。提取了持续时间、高强度加速(>2.5m.s-2,持续时间>1秒)、短跑(>7m.s-1)和重复高强度努力(≥3次加速或短跑,两次努力之间的恢复时间≤45秒)。混合效应模型用于估算每种结果的平均值(固定效应),并对球员和比赛进行随机截距建模。 球员每场比赛活动 51 分钟,完成 42 次高强度加速运动,持续时间为 3.6 秒,运动距离为 12.9 米,峰值速度为 4.8 米/秒-1。只有 6.4% 的高强度加速达到了冲刺速度(每场比赛 2.5 次),这些加速持续了 6.1 秒,跑了 35.6 米,峰值速度为 7.5 米/秒-1。球员在每场比赛中完成了 4.5 次重复的高强度加速,每次加速 3.7 次,中间有 16.4 秒的恢复时间;但是,没有观察到重复冲刺。 高强度加速在曲棍球比赛中经常出现,但很少能达到冲刺速度。练习者应考虑监测高强度加速,以确保球员为满足比赛要求做好充分准备。
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引用次数: 0
LONG-TERM SPORT OR EXERCISE COMMENCED BEFORE 16 YEARS OF AGE REDUCES ADVERSE BODY COMPOSITION OUTCOMES IN CEREBRAL PALSY 16 岁前开始的长期运动或锻炼可减少脑瘫患者身体成分的不良后果
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.388
Dr Jennifer Fleeton, Dr Ché Fornusek, Dr Yorgi Mavros, Professor Ross Sanders
Bone mineral density (BMD) and appendicular lean mass (ALM) deficits are common in people with cerebral palsy (CP), increasing sarcopenia and osteoporosis risk, while sport/exercise participation before age 16 improves adult peak bone mass accretion. This study investigated the effects of high-level sport/exercise participation commenced before 16 years of age on body composition in ambulatory adults with CP. Body composition was measured via dual-energy X-ray absorptiometry in a cross-sectional observational pilot study of 26 adults (m=19; f=7; GMFCS I-III) grouped via self-reported activity level into Low (<150 minutes moderate-vigorous activity weekly; n=10), Post-16 (active but commenced participation after 16; n=6), and Pre-16 (active and commenced participation before 16; n=10). Between-group Z-score differences were assessed via Kruskal-Wallis one-way ANOVA, with post-hoc comparisons via Mann-Whitney U-test. Whole body, spine and hip BMD Z-scores were significantly higher in Pre-16 (1.020 (0.639), 1.210 (1.102), and 0.450 (1.325), respectively) versus Low (-0.500 (0.715), -0.840 (0.957), and -1.020 (1.059), respectively) (p<0.001-0.008). Thirteen participants, including four competitive athletes, had low BMD, and 15, including eight athletes, had moderate-significant ALM deficits, versus age- and sex-specific reference populations. Ambulatory adults with CP who exceed physical activity guidelines and commenced participation before 16 years of age have higher BMD than those who are sedentary or commenced participation after 16 years. Sport and exercise across the lifespan are critical to ameliorate adverse body composition outcomes common in CP, however, some athletes remain at-risk and require targeted combined resistance training and dietary interventions in addition to sport training to address low ALM and BMD.
脑性瘫痪(CP)患者普遍存在骨矿密度(BMD)和关节瘦体重(ALM)不足的问题,这增加了肌肉疏松症和骨质疏松症的风险,而在 16 岁前参加体育/锻炼则可提高成人峰值骨量的增加。本研究调查了 16 岁前开始参加高水平运动/锻炼对行动不便的成年脑瘫患者身体成分的影响。 在一项横断面观察性试验研究中,通过双能 X 射线吸收测量法测量了 26 名成年人(男=19;女=7;GMFCS I-III)的身体成分,并根据自我报告的活动水平将其分为低水平组(每周中等强度活动时间小于 150 分钟;人数=10)、16 岁后(16 岁后开始参加活动;人数=6)和 16 岁前(16 岁前开始参加活动;人数=10)。组间 Z 值差异通过 Kruskal-Wallis 单向方差分析进行评估,并通过 Mann-Whitney U 检验进行事后比较。 16 岁前组(分别为 1.020 (0.639)、1.210 (1.102) 和 0.450 (1.325))与 16 岁后组(分别为 -0.500 (0.715)、-0.840 (0.957) 和 -1.020 (1.059))相比,全身、脊柱和髋部 BMD Z 值均明显较高(P<0.001-0.008)。与特定年龄和性别的参考人群相比,13 名参与者(包括 4 名竞技运动员)的 BMD 偏低,15 名参与者(包括 8 名运动员)的 ALM 存在中度显著缺陷。 与那些久坐不动或 16 岁以后才开始参加体育锻炼的人相比,那些超过体育锻炼指南要求并在 16 岁以前开始参加体育锻炼的患有慢性阻塞性肺病的非卧床成年人的 BMD 较高。在整个生命周期中,运动和锻炼对于改善脊髓灰质炎患者常见的不良身体成分结果至关重要,然而,一些运动员仍处于危险之中,除了运动训练外,还需要有针对性地进行综合阻力训练和饮食干预,以解决 ALM 和 BMD 偏低的问题。
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引用次数: 0
CONCURRENT VALIDITY OF CLINICAL EQUATIONS TO PREDICT RESTING ENERGY EXPENDITURE COMPARED TO INDIRECT CALORIMETRY IN NON-SEVERE BURN PATIENTS 预测非重度烧伤患者静息能量消耗的临床方程与间接热量计的并发有效性比较
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.468
Mr Tyler Osborne, Associate Professor Dale Edgar, Associate Professor Timothy Fairchild, Dr Brook Galna, Winthrop Professor Fiona Wood, Ms Brodie Allan, Mr Thomas Le Huray, Associate Professor Bradley Wall
Underfeeding and overfeeding can inhibit recovery and negatively impact quality of life during and after receiving treatment for a burn injury. Clinicians rely on accurate estimation of resting energy expenditure to avoid overfeeding or underfeeding their patients. The criterion standard for measuring resting energy expenditure is indirect calorimetry. Many burn services use predictive equations to prescribe feeding regimes because they are cheaper, time efficient and logistically more expedient than indirect calorimetry and do not require specialised equipment. However, the validity of these clinical equations has not been established in non-severe burns (<15% total burn surface area, TBSA). In this study, resting energy expenditure was predicted for 35 participants with non-severe burn injuries using seven clinical equations and compared with the criterion-standard (indirect calorimetry). We found that all clinical equations may be inaccurate in predicting resting energy expenditure measured using indirect calorimetry, with the Schofield equation agreeing most closely (95% limits of agreement: -836 to 711 kcal.day-1). Agreement between clinical equations and indirect calorimetry remained poor even after correcting for TBSA. Our findings indicate clinical equations may not accurately predict resting energy expenditure of people who have sustained a non-severe burn. As such, we urge caution against relying solely on the existing predictive equations to guide clinical decisions regarding energy intake after non-severe burns.
在接受烧伤治疗期间和治疗后,进食不足和进食过量都会抑制患者的恢复并对生活质量产生负面影响。临床医生需要准确估算静息能量消耗,以避免患者进食过多或过少。测量静息能量消耗的标准是间接热量计。许多烧伤治疗机构使用预测方程来制定喂食方案,因为这些方案比间接热量计更便宜、更省时、更方便,而且不需要专用设备。然而,这些临床方程在非严重烧伤(烧伤总面积小于 15%)中的有效性尚未得到证实。在这项研究中,我们使用七个临床方程对 35 名非严重烧伤患者的静息能量消耗进行了预测,并与标准(间接热量测定法)进行了比较。我们发现,所有临床方程在预测间接热量测定法测得的静息能量消耗时都可能不准确,其中肖菲尔德方程的吻合度最高(95% 的吻合度范围:-836 至 711 千卡/天-1)。即使校正了 TBSA,临床方程与间接热量测定法之间的一致性仍然很差。我们的研究结果表明,临床方程可能无法准确预测非严重烧伤患者的静息能量消耗。因此,我们呼吁在非重度烧伤后,不要仅仅依靠现有的预测方程来指导临床决定能量摄入。
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引用次数: 0
EXERCISE PROGRAM WITHIN ADULT PSYCHIATRIC INPATIENT SERVICES FOR THOSE WITH DISORDERED EATING 在成人精神科住院病人服务中为饮食失调患者提供运动计划
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.381
Dr Kemi Wright, Dr Bonnie Furzer, Caleb McMahen, Jessica Luke, Brittany Herbert, Azam Edoo
Over one million Australians live with an eating disorder, with 40 – 80% reported to undertake dysfunctional exercise practices (e.g., compulsive exercise, exercise dependence). Dysfunctional exercise can be the first symptom to appear and the last symptom to resolved in eating disorder patients, with 41% of eating disorders patients relapsing into dysfunctional exercise patterns 4 to 9 months post inpatient treatment. We evaluated an accredited exercise physiology led program implemented for adult mental health inpatients with disordered eating and exercise behaviours to support patient outcomes and safe exercise participation. Data was collected as part of service evaluation and included patient characteristics, session data (e.g., mood and enjoyment via Exercise Enjoyment Scale) and patient outcomes (e.g., Compulsive Exercise Test (CET); Exercise Dependence Scale (EDS-21)). Characteristics of the cohort was reported and compared to clinical cut-offs, along with program feasibility measures. Between Sep 2022 and Nov 2023, 20 female patients engaged in the program (mean age= 26 years). Of those 15 were diagnosed with Anorexia Nervosa, 16 with a co-occurring Personality Disorder and 9 with a Trauma Related Disorder. EDS-21 results showed 56% were symptomatic, and 33% exercise dependent, with 80% also presenting with suicidal ideation/self-harm. Across 137 service interactions, patients engaged 65% of the time, and 25% of the time deemed inappropriate. Pre-session mood was low (mean= -2.13 ± 1.46) with an average post-session mood improvement of + 4.46 Session enjoyment was high (mean=3.6±1.20) and no adverse events were recorded. Exercise supported by AEPs is safe for inpatients with disorder eating, with patients valuing engagement in services focused on supporting positive exercise relationships and behaviours. A tailored and evidence-based approach to exercise can improve acute mood of consumers.
据报道,超过一百万澳大利亚人患有饮食失调症,其中40-80%的人有运动功能障碍(如强迫性运动、运动依赖)。运动功能障碍可能是饮食失调症患者出现的第一个症状,也可能是最后一个症状,41%的饮食失调症患者在住院治疗后的4至9个月内会重新陷入运动功能障碍模式。我们评估了一项经认可的运动生理学主导计划,该计划针对有饮食和运动行为障碍的成人精神疾病住院患者实施,以支持患者的治疗效果和安全的运动参与。 数据收集是服务评估的一部分,包括患者特征、疗程数据(例如,通过运动享受量表获得的情绪和乐趣)和患者疗效(例如,强迫性运动测试(CET);运动依赖量表(EDS-21))。报告了队列的特征,并将其与临床临界值以及计划可行性措施进行了比较。 2022 年 9 月至 2023 年 11 月期间,20 名女性患者参与了该计划(平均年龄= 26 岁)。其中 15 人被诊断为神经性厌食症,16 人同时患有人格障碍,9 人患有创伤相关障碍。EDS-21 结果显示,56% 的人有症状,33% 的人有运动依赖,80% 的人有自杀倾向/自残。在137次服务互动中,65%的时间患者参与了互动,25%的时间被认为是不恰当的。会前情绪低落(平均值=-2.13±1.46),会后平均情绪改善+ 4.46 会期愉悦度高(平均值=3.6±1.20),无不良事件记录。 AEP支持的运动对饮食失调住院患者是安全的,患者重视参与以支持积极的运动关系和行为为重点的服务。量身定制的循证运动方法可以改善患者的急性情绪。
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引用次数: 0
WALKING WITH BLOOD FLOW RESTRICTION: A NOVEL METHOD TO IMPROVE PHYSICAL FITNESS IN OLDER ADULTS? 限制血流的步行:提高老年人体能的新方法?
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.439
Mr Michael Beere, Dr Isaac Selva Raj, P. J. Peiffer, Professor Keith Hill, Dr Peter Edwards, Dr Belinda Brown, A. P. B. Scott
Alternative physical activity modalities and methods are needed to combat low adherence among older populations. Therefore, we are investigating whether blood flow restricted (BFR) walking improves measures of lower limb strength, and functional performance, compared to traditional walking in older adults. Healthy adults ≥60 years were randomised into BFR (n=5) or non-BFR (n=4) walking groups. Both groups walked outdoors, 3 days/week for 12 weeks starting at 4km/h and increasing walking speed by 0.5km/h every 4 weeks. The BFR group walked for 25min with BFR applied (60% arterial occlusion pressure) to the lower limbs in 2x 10mins bouts (separated by 5mins walking without occlusion). The non-BFR group walked for 50mins without occlusion, matching current best practice for low-moderate intensity physical activity. Participants were assessed at baseline and post-intervention (12 weeks) for knee extension maximal voluntary torque (MVTpeak) and functional capacity (four square step test [4SST], 5x sit-to-stand [STS], timed up and go [TUG], gait speed, and 6-minute walk test [6mWT]). There were no differences at baseline between groups (p>0.05). Both groups improved across all measures from baseline to post-intervention, with significant effects for time observed for: 4SST (7.92±1.2s – 6.83±1.39s; p=0.035), TUG (6.16±0.81s – 5.58±0.9s; p=0.04), STS (11.30±1.70s – 10.14±1.7s; p=0.032), but not for gait speed (3.98±0.69s – 3.71±0.69s; p=0.456), 6mWT (564.72±72.13m – 601.27±64.2m; p=0.129) and MVTpeak (112.33±25.8Nm – 120.55±23.5Nm; p=0.995). No group x time effect was observed from baseline to 12 weeks (p>0.05). The current results demonstrate significant improvements in functional measures (4SST, TUG, STS) from baseline to post-intervention, with no differences observed between groups. This indicates that low-intensity BFR walking may provide comparable physical fitness improvements to non-BFR walking while completing only 50% of the volume.
我们需要采用其他体育锻炼方式和方法来解决老年人坚持锻炼率低的问题。因此,我们正在研究与传统步行相比,血流受限(BFR)步行是否能改善老年人的下肢力量和功能表现。 年龄≥60 岁的健康成年人被随机分为血流受限步行组(5 人)和非血流受限步行组(4 人)。两组均在室外步行,每周 3 天,为期 12 周,从每小时 4 公里开始,每 4 周将步行速度提高 0.5 公里。BFR组在下肢施加BFR(60%动脉闭塞压力)的情况下步行25分钟,每10分钟为2次(间隔5分钟不闭塞步行)。非 BFR 组在不闭塞的情况下步行 50 分钟,符合当前低中等强度体育锻炼的最佳实践。参与者在基线和干预后(12 周)接受了膝关节伸展最大自主扭矩(MVTpeak)和功能能力(四平方步测试 [4SST]、5 倍坐立测试 [STS]、定时起立行走测试 [TUG]、步速和 6 分钟步行测试 [6mWT])的评估。 两组在基线上没有差异(P>0.05)。从基线到干预后,两组在所有测量指标上均有所改善,并在以下方面观察到显著的时间效应:4SST (7.92±1.2s - 6.83±1.39s;p=0.035)、TUG (6.16±0.81s - 5.58±0.9s;p=0.04)、STS (11.30±1.70s - 10.14±1.7s;p=0.032),但步态速度(3.98±0.69s-3.71±0.69s;p=0.456)、6mWT(564.72±72.13m-601.27±64.2m;p=0.129)和 MVTpeak(112.33±25.8Nm-120.55±23.5Nm;p=0.995)。从基线到 12 周,未观察到组别 x 时间效应(p>0.05)。 目前的结果表明,从基线到干预后,功能测量(4SST、TUG、STS)均有明显改善,组间无差异。这表明,低强度 BFR 步行可提供与非 BFR 步行相当的体能改善,同时只完成 50%的运动量。
{"title":"WALKING WITH BLOOD FLOW RESTRICTION: A NOVEL METHOD TO IMPROVE PHYSICAL FITNESS IN OLDER ADULTS?","authors":"Mr Michael Beere, Dr Isaac Selva Raj, P. J. Peiffer, Professor Keith Hill, Dr Peter Edwards, Dr Belinda Brown, A. P. B. Scott","doi":"10.31189/2165-7629-13-s2.439","DOIUrl":"https://doi.org/10.31189/2165-7629-13-s2.439","url":null,"abstract":"\u0000 \u0000 Alternative physical activity modalities and methods are needed to combat low adherence among older populations. Therefore, we are investigating whether blood flow restricted (BFR) walking improves measures of lower limb strength, and functional performance, compared to traditional walking in older adults.\u0000 \u0000 \u0000 \u0000 Healthy adults ≥60 years were randomised into BFR (n=5) or non-BFR (n=4) walking groups. Both groups walked outdoors, 3 days/week for 12 weeks starting at 4km/h and increasing walking speed by 0.5km/h every 4 weeks. The BFR group walked for 25min with BFR applied (60% arterial occlusion pressure) to the lower limbs in 2x 10mins bouts (separated by 5mins walking without occlusion). The non-BFR group walked for 50mins without occlusion, matching current best practice for low-moderate intensity physical activity. Participants were assessed at baseline and post-intervention (12 weeks) for knee extension maximal voluntary torque (MVTpeak) and functional capacity (four square step test [4SST], 5x sit-to-stand [STS], timed up and go [TUG], gait speed, and 6-minute walk test [6mWT]).\u0000 \u0000 \u0000 \u0000 There were no differences at baseline between groups (p>0.05). Both groups improved across all measures from baseline to post-intervention, with significant effects for time observed for: 4SST (7.92±1.2s – 6.83±1.39s; p=0.035), TUG (6.16±0.81s – 5.58±0.9s; p=0.04), STS (11.30±1.70s – 10.14±1.7s; p=0.032), but not for gait speed (3.98±0.69s – 3.71±0.69s; p=0.456), 6mWT (564.72±72.13m – 601.27±64.2m; p=0.129) and MVTpeak (112.33±25.8Nm – 120.55±23.5Nm; p=0.995). No group x time effect was observed from baseline to 12 weeks (p>0.05).\u0000 \u0000 \u0000 \u0000 The current results demonstrate significant improvements in functional measures (4SST, TUG, STS) from baseline to post-intervention, with no differences observed between groups. This indicates that low-intensity BFR walking may provide comparable physical fitness improvements to non-BFR walking while completing only 50% of the volume.\u0000","PeriodicalId":92070,"journal":{"name":"Journal of clinical exercise physiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141053248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
BLUNTED SKELETAL MUSCLE MICROVASCULAR BLOOD FLOW IS A POTENTIAL UNDERLYING MECHANISM FOR EXERCISE INTOLERANCE IN ADULTS WITH ATRIAL FIBRILLATION 骨骼肌微血管血流减弱是心房颤动成人运动不耐受的潜在内在机制
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.443
Dr Kimberley Way, Dr Lewan Parker, Dr Hannah Thomas, Ms Sian O’Gorman, Dr Barbara Brayner, Dr. Jenna McVicar, Dr. Christian Verdicchio, Prof. Ralph Maddison, Geoff Wong, Jennifer L Reed, M. Keske
Approximately 45% of adults living with atrial fibrillation (AF) experience exercise intolerance (EI). However, the mechanisms of EI in AF are not well understood. We aimed to determine whether impaired skeletal muscle microvascular blood flow (MBF), not macrovascular, responses to peak exercise is a plausible explanation for EI in adults with AF. Adults with AF and healthy controls completed a Modified Bruce treadmill protocol to obtain peak oxygen uptake (V̇O2peak). Skeletal muscle microvascular blood volume, velocity, and flow in the vastus lateralis muscle was assessed using contrast enhanced ultrasound. Superficial femoral artery diameter, blood velocity and flow were assessed using 2D and Doppler ultrasound. Vascular measurements were collected at rest, immediately post-exercise, and 30 minutes post-exercise. Nine adults with AF (age: 62±5 years, 66% females, BMI: 29.7±4.2 kg/m2, V̇O2peak: 24.3±6.1 mL/kg/min) and seven controls (age: 63±10 years, 57% females, BMI: 26.7±1.7 kg/m2, V̇O2peak: 31.0±7.5 mL/kg/min) participated. One participant was in AF during testing. A significant group x time interaction in skeletal muscle MBF (p=0.04) and near significant interaction in blood volume (capillary recruitment, p=0.08) was observed. Post-hoc analysis revealed adults with AF had a significantly blunted MBF at 30 minutes post-exercise (-1.3 fold versus control, p=0.01) and reduced microvascular blood volume (i.e. capillary recruitment) pre- and 30 minutes post-exercise (-6.6 fold [p=0.01] and -9.4 fold [p=0.01] versus controls). No differences were observed for changes in skeletal muscle microvascular blood velocity, or femoral artery diameter, blood velocity or flow. Despite similar femoral artery blood flow responses, adults with AF have lower skeletal muscle MBF responses to peak exercise which may be driven by a reduced capillary recruitment in the skeletal muscle. Our findings provide new insight into vascular complications which may partially explain EI in those with AF.
在患有心房颤动(房颤)的成年人中,约有 45% 的人有运动不耐受(EI)的经历。然而,心房颤动患者运动不耐受的机制尚不十分清楚。我们旨在确定骨骼肌微血管血流(MBF)而非大血管对峰值运动的反应受损是否是房颤成人患者运动不耐受的一个合理解释。 患有房颤的成人和健康对照组完成了 "改良布鲁斯 "跑步机方案,以获得峰值摄氧量(V̇O2peak)。使用造影剂增强超声波评估了大腿外侧肌的骨骼肌微血管血容量、速度和流量。使用二维和多普勒超声波评估股浅动脉直径、血流速度和流量。血管测量在休息、运动后立即和运动后 30 分钟进行。 九名成人房颤患者(年龄:62±5 岁,66% 为女性,体重指数:29.7±4.2 kg/m2,V.M.O.峰值:24.3±6.1 mL/kg/min)和七名对照组患者(年龄:63±10 岁,57% 为女性,体重指数:26.7±1.7 kg/m2,V.M.O.峰值:31.0±7.5 mL/kg/min,BMI:29.7±4.2 kg/m2,V.M.O.峰值:24.3±6.1 mL/kg/min31.0±7.5 mL/kg/min )。一名参与者在测试期间出现房颤。在骨骼肌 MBF(p=0.04)和血容量(毛细血管募集,p=0.08)方面,观察到组别与时间之间存在明显的交互作用。事后分析显示,患有心房颤动的成年人在运动后 30 分钟的肌肉束流明显减弱(与对照组相比-1.3 倍,p=0.01),运动前和运动后 30 分钟的微血管血容量(即毛细血管募集)减少(与对照组相比-6.6 倍[p=0.01]和-9.4 倍[p=0.01])。骨骼肌微血管血流速度、股动脉直径、血流速度或血流量的变化均无差异。 尽管股动脉血流反应相似,但患有房颤的成年人对峰值运动的骨骼肌MBF反应较低,这可能是由于骨骼肌中毛细血管招募减少所致。我们的研究结果为血管并发症提供了新的见解,这可能是心房颤动患者EI的部分原因。
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引用次数: 0
A CASE STUDY OF THE PHYSIOLOGICAL AND PSYCHOLOGICAL RESPONSES TO COACHING PROFESSIONAL AUSTRALIAN FOOTBALL 澳大利亚职业足球教练生理和心理反应案例研究
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.422
Prof. Mark Watsford, Mr Adam Trama, Dr Yael Grasko, Ms Suzie Rhydderch, Dr Milo Arne-Wilkinson, Dr Simon Eggleton, Dr Tom Cross
Coaching professional sport is stressful, yet there is little information detailing the physiological and psychological responses of coaches during match-play. The burden of measurement instruments during competition may preclude their use with coaches during this high-pressure part of the coaching cycle. This exploratory case study examined physiological and psychological alterations when coaching professional Australian football to determine the potential health implications and enhance health literacy in coaches. One head coach of a professional football team was monitored for heart rate (HR), stress-related hormones (C-Reactive Protein, Cortisol, Troponin, Brain Natriuretic Peptide) and psychological stress prior to, during and following seven matches and descriptive data was examined. The HR response indicated sustained elevation during match-play, with the intermittent nature of the game causing an undulating profile. Periods of locomotion during breaks in play led to elevations in HR, with maximum HR recorded as 8% above age-predicted maximum. Further, differences in HR were evident in the final five minutes between small (145 ± 7.0 bpm) and large (113 ± 5.1 bpm) score margins. There were no irregularities for stress hormones, while the psychological questionnaire revealed differences in perceptions of accomplishment, success, recovery and stress related to match outcome. This exploratory case study indicated that substantial elevations in HR are evident while coaching professional football, yielding implications for health management. Coaches require appropriate levels of cardiovascular health to cope with the demands of coaching and targeted health intervention programs may be warranted. Further, differences in psychological outcomes from winning or losing may reflect the need to develop recovery and coping strategies that are contextualised to match results. Since match-play observation elicits alterations to physical and psychological markers, confirmatory research with larger cohorts is warranted to examine and enhance well-being and health management strategies in these elite performers.
执教职业体育运动压力很大,但有关教练员在比赛期间的生理和心理反应的详细信息却很少。在教练周期的这一高压阶段,比赛期间测量工具的负担可能会使教练无法使用这些工具。这项探索性案例研究考察了教练员在执教澳大利亚职业足球队时的生理和心理变化,以确定潜在的健康影响并提高教练员的健康素养。 在七场比赛之前、期间和之后,对职业足球队的一名主教练进行了心率(HR)、压力相关激素(C-反应蛋白、皮质醇、肌钙蛋白、脑钠肽)和心理压力监测,并对描述性数据进行了研究。 心率反应表明,比赛期间心率持续上升,比赛的间歇性导致心率起伏不定。比赛间歇期间的运动导致心率升高,记录的最大心率比年龄预测的最大值高出 8%。此外,在最后五分钟,比分差距小(145 ± 7.0 bpm)和比分差距大(113 ± 5.1 bpm)之间的心率差异也很明显。压力荷尔蒙没有异常,而心理问卷则显示了与比赛结果有关的成就感、成功感、恢复感和压力感方面的差异。 这项探索性案例研究表明,在从事职业足球教练工作时,心率明显大幅升高,这对健康管理产生了影响。教练需要适当的心血管健康水平来应对教练工作的需求,因此可能需要制定有针对性的健康干预计划。此外,输赢造成的心理结果差异可能反映出需要根据比赛结果制定恢复和应对策略。由于比赛观察会引起生理和心理指标的变化,因此有必要对更大的群体进行确认性研究,以检查和提高这些精英运动员的幸福感和健康管理策略。
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引用次数: 0
BENEFICIAL EFFECTS OF A COMBINED AEROBIC AND STRENGTH TRAINING PROGRAM IN PATIENTS WITH MOTOR NEURON DISEASE 运动神经元病患者综合有氧和力量训练计划的益处
Pub Date : 2024-05-01 DOI: 10.31189/2165-7629-13-s2.512
Dr Alessandra Ferri, Francesca Lanfranconi
Motor Neuron Disease (MND) is a neurodegenerative disease characterised by the progressive degeneration and death of motor neurons, which leads to a reduction in muscle strength and physical function. Although “Exercise as Medicine” is accepted for many diseases, the role of exercise in individuals with MND is still debated. The aim of this study was to evaluate the effect of a combined, moderate-intensity, aerobic and strength training program on aerobic capacities, strength and physical function in individuals with MND. Fifteen individuals with MND were randomly assigned to either a training (3 times/week for 12 weeks; TRAIN, n=8) or a control (continued their usual standard of care; CTRL, n=7) group. The peak aerobic capacity (VO2peak) and the maximal capacity of oxygen extraction (via Near-Infrared Spectroscopy) were evaluated during an incremental test to exhaustion on a cycle ergometer. The strength of both the lower- and upper-limb muscles was evaluated with a 1-Repetition Maximum (1RM) test on the leg press, leg extension, biceps curl, and vertical chest press. Participants also performed the “Timed Up and Go” test (TUG) and the 6-min walking test (6MWT). The adherence to training was 86 ± 6%, and the satisfaction with the exercise program was 9.6 out of 10. VO2peak did not change significantly in both groups, but the maximal capacity of O2 extraction improved significantly in TRAIN (from 44 ± 3 to 67 ± 4%). In TRAIN, the 1RM for the leg press and leg extension increased significantly by 47 ± 8% and 50 ± 13%, respectively, while this parameter did not change in CTRL. While the 6MWT increased by 5% in TRAIN and decreased by 3% in CTRL, the change was not significant. These preliminary results support the beneficial role of a combined aerobic and strength training program in individuals with MND.
运动神经元病(MND)是一种神经退行性疾病,其特点是运动神经元逐渐退化和死亡,导致肌肉力量和身体功能下降。虽然 "运动即医疗 "已被许多疾病所接受,但运动对 MND 患者的作用仍存在争议。本研究旨在评估中等强度的有氧和力量综合训练计划对 MND 患者有氧能力、力量和身体功能的影响。 15 名 MND 患者被随机分配到训练组(每周 3 次,为期 12 周;TRAIN,人数=8)或对照组(继续其常规标准护理;CTRL,人数=7)。在自行车测力计上进行力竭递增测试时,对峰值有氧能力(VO2peak)和最大析氧能力(通过近红外光谱)进行了评估。通过腿部推举、腿部伸展、二头肌卷曲和垂直胸部推举的最大重复次数(1RM)测试,对下肢和上肢肌肉的力量进行了评估。参与者还进行了 "定时起立行走 "测试(TUG)和 6 分钟步行测试(6MWT)。 训练坚持率为 86 ± 6%,运动计划满意度为 9.6(满分为 10 分)。两组的 VO2 峰值均无明显变化,但 TRAIN 组的最大氧气萃取能力明显提高(从 44±3% 提高到 67±4%)。在 TRAIN 组中,压腿和伸腿的 1RM 分别显著提高了 47 ± 8% 和 50 ± 13%,而在 CTRL 组中这一参数没有变化。虽然 6MWT 在 TRAIN 中增加了 5%,在 CTRL 中减少了 3%,但变化并不显著。 这些初步结果支持有氧和力量训练相结合的计划对 MND 患者的益处。
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Journal of clinical exercise physiology
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