Are anti-gravity treadmills reliable to explore exercise energy metabolism at low degrees of alleviation in normal-weight male individuals?

IF 1.4 4区医学 Q4 ENGINEERING, BIOMEDICAL Technology and Health Care Pub Date : 2024-07-07 DOI:10.3233/THC-240314

Léna Pélissier, Duane Beraud, Bruno Pereira, Alexis Couret, Laurie Isacco, David Thivel

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Abstract

Background: Exploring the independent effect of mechanical discharge in response to weight loss (WL) seems necessary but remains highly challenging from a methodological point. Anti-gravity treadmills could be relevant to simulate a mechanical WL by body weight support (BWS), but their reliability remains unclear to properly explore exercise energy metabolism, especially at low degrees of alleviations.

Objective: The study aimed to evaluate the accuracy and reproducibility of an anti-gravity treadmill to generate BWS, and the reproducibility of cardiometabolic responses to an exercise performed at low degrees of BWS on this device.

Methods: Observed BWS of 18 normal-weight males was obtained twice at seven degrees of target BWS (i.e., 0, 3, 6, 9, 12, 15, 18%) using a digital scale inside the anti-gravity treadmill, and was compared to the expected BWS. Then, 15 of them performed 5-min bout of low-intensity walking exercise at these degrees of BWS in a randomized order, separated by 4-min rest. The exercise was identically repeated on three occasions separated by a minimum of 3 days. Energy metabolism and heart rate (HR) were measured throughout the exercise by indirect calorimetry and a HR monitor, respectively.

Results: The observed BWS were significantly different from the expected BWS (p< 0.001), and there was a high inter- and intra-individual variability in BWS generated by the anti-gravity treadmill. Results showed an overall good reliability of VO2 (intraclass correlation coefficients (ICC) values ranging from 0.67 to 0.85) and HR (ICC > 0.8) in response to exercise. An effect of the degree of BWS was observed for VO2 (p< 0.001), illustrating reduced values at 15% and 18% of BWS compared to 0, 3, and 6%.

Conclusions: Such device might not be adapted to simulate low degrees of WL in normal-weight males, particularly when it comes to the exploration of energy metabolism.

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反重力跑步机对正常体重的男性在低缓解度下探索运动能量代谢是否可靠？

背景：探索机械放电对减轻体重（WL）的独立影响似乎很有必要，但从方法学的角度来看仍然极具挑战性。反重力跑步机可通过体重支撑（BWS）模拟机械减重，但其可靠性仍不清楚，无法正确探索运动能量代谢，尤其是在低度减轻时：本研究旨在评估反重力跑步机产生体重支撑的准确性和可重复性，以及在该设备上进行低度体重支撑运动时心脏代谢反应的可重复性：方法：使用反重力跑步机内的数字刻度，在七个目标 BWS 度（即 0、3、6、9、12、15、18%）下对 18 名体重正常的男性进行两次观察，并将观察到的 BWS 与预期 BWS 进行比较。然后，其中 15 人按随机顺序在这些 BWS 度下进行 5 分钟的低强度步行运动，中间休息 4 分钟。在至少相隔 3 天的时间内，重复进行三次相同的运动。在整个运动过程中，分别用间接热量计和心率监测器测量能量代谢和心率：结果：观察到的血氧饱和度与预期的血氧饱和度有很大差异（P< 0.001），反重力跑步机产生的血氧饱和度在个体间和个体内有很大差异。结果显示，VO2（类内相关系数（ICC）值在 0.67 至 0.85 之间）和心率（ICC > 0.8）对运动反应的总体可靠性良好。在 VO2 方面观察到了 BWS 程度的影响（p< 0.001），说明与 0、3 和 6% 的 BWS 程度相比，15% 和 18% 的 BWS 程度会降低 VO2 值：这种装置可能不适合模拟正常体重男性的低WL程度，尤其是在能量代谢方面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Technology and Health Care HEALTH CARE SCIENCES & SERVICES-ENGINEERING, BIOMEDICAL

CiteScore

2.10

自引率

6.20%

发文量

282

审稿时长

>12 weeks

期刊介绍： Technology and Health Care is intended to serve as a forum for the presentation of original articles and technical notes, observing rigorous scientific standards. Furthermore, upon invitation, reviews, tutorials, discussion papers and minisymposia are featured. The main focus of THC is related to the overlapping areas of engineering and medicine. The following types of contributions are considered: 1.Original articles: New concepts, procedures and devices associated with the use of technology in medical research and clinical practice are presented to a readership with a widespread background in engineering and/or medicine. In particular, the clinical benefit deriving from the application of engineering methods and devices in clinical medicine should be demonstrated. Typically, full length original contributions have a length of 4000 words, thereby taking duly into account figures and tables. 2.Technical Notes and Short Communications: Technical Notes relate to novel technical developments with relevance for clinical medicine. In Short Communications, clinical applications are shortly described. 3.Both Technical Notes and Short Communications typically have a length of 1500 words. Reviews and Tutorials (upon invitation only): Tutorial and educational articles for persons with a primarily medical background on principles of engineering with particular significance for biomedical applications and vice versa are presented. The Editorial Board is responsible for the selection of topics. 4.Minisymposia (upon invitation only): Under the leadership of a Special Editor, controversial or important issues relating to health care are highlighted and discussed by various authors. 5.Letters to the Editors: Discussions or short statements (not indexed).