Differences in Abdominal and Lumbar Muscle Thickness and Contractile Function Between Nulliparous, Primiparous, and Multiparous Women 6 Months Postpartum.

IF 3.5 4区 医学 Q1 ORTHOPEDICS Physical Therapy Pub Date : 2024-10-10 DOI:10.1093/ptj/pzae141
Laura Fuentes-Aparicio, Sofia Pérez-Alenda, Juan J Carrasco, Begoña Valls-Donderis, Lirios Dueñas, Mercè Balasch-Bernat
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Abstract

Objective: The purpose of this study was to evaluate the differences between primiparous and multiparous women at 6 months postpartum and nulliparous women regarding the thickness (including thickness pattern) and contractile function of the abdominal and lumbar muscles.

Methods: A cross-sectional observational study of 80 women, both primiparous (n = 29) and multiparous (n = 25), as well as including nulliparous as a comparison group (n = 26), was conducted. B-mode ultrasound imaging was used for the measurement of abdominal and lumbar muscle thickness in 2 conditions (resting and activation). Moreover, the contractile function of these muscles was determined by the thickness ratio.

Results: Significant differences between groups were observed in abdominal muscle thickness. During activation, the obliques showed a lower thickness in both groups of postpartum women compared to nulliparous women, while lower values for the thickness for the transverse abdominis (TrA) were only observed in primiparous women. The thickness pattern observed in nulliparous women both in resting and in activation (internal oblique [IO] > external oblique [EO] > TrA) was also achieved among postpartum women, despite no statistical differences observed between IO and EO in these groups. No significant differences between groups were observed for contractile function, showing the TrA greater values, followed by IO and EO in both nulliparous and postpartum women.

Conclusions: This study suggests that the thickness (and the thickness pattern) of the abdominal muscles in women at 6 months postpartum differs from nulliparous, while for the lumbar muscles, it is comparable to nulliparous. However, despite the obliques being thinner in postpartum women, the abdominal muscles are functionally competent.

Impact: This is believed to be the first study to compare abdominal and lumbar muscles thickness and contractile function specifically between primiparous and multiparous women. Although at 6 months' postpartum abdominal thickness differs from nulliparous women, these muscles are functionally competent. These findings provide valuable insights for use in the development of postpartum interventions.

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单胎、一胎和多胎妇女产后 6 个月腹部和腰部肌肉厚度及收缩功能的差异。
研究目的本研究的目的是评估产后 6 个月的初产妇和多产妇与非初产妇在腹肌和腰肌的厚度(包括厚度模式)和收缩功能方面的差异:对 80 名初产妇(29 人)和多产妇(25 人)进行了横断面观察研究,并将无产妇作为对比组(26 人)。B 型超声波成像用于测量两种状态(静止和激活)下的腹肌和腰肌厚度。此外,这些肌肉的收缩功能是通过厚度比来确定的:结果:腹部肌肉厚度在各组之间存在显著差异。在激活过程中,两组产后妇女的斜方肌厚度均低于无产褥期妇女,而只有初产妇的腹横肌厚度值较低。产后妇女在静止和激活状态下观察到的厚度模式(腹内斜肌[IO]>腹外斜肌[EO]>TrA)也同样存在,尽管在这些组别中腹内斜肌和腹外斜肌之间没有观察到统计学差异。在收缩功能方面,各组间未观察到明显差异,在无产褥期妇女和产后妇女中,TRA 的值更大,其次是 IO 和 EO:这项研究表明,产后 6 个月妇女腹部肌肉的厚度(和厚度模式)与无产褥期妇女不同,而腰部肌肉的厚度与无产褥期妇女相当。然而,尽管产后妇女的斜方肌较薄,但腹部肌肉的功能却很强:这被认为是第一项专门比较初产妇和多产妇腹肌和腰肌厚度及收缩功能的研究。虽然产后 6 个月的腹部厚度与无产褥期妇女不同,但这些肌肉的功能是正常的。这些发现为制定产后干预措施提供了宝贵的启示。
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来源期刊
Physical Therapy
Physical Therapy Multiple-
CiteScore
7.10
自引率
0.00%
发文量
187
审稿时长
4-8 weeks
期刊介绍: Physical Therapy (PTJ) engages and inspires an international readership on topics related to physical therapy. As the leading international journal for research in physical therapy and related fields, PTJ publishes innovative and highly relevant content for both clinicians and scientists and uses a variety of interactive approaches to communicate that content, with the expressed purpose of improving patient care. PTJ"s circulation in 2008 is more than 72,000. Its 2007 impact factor was 2.152. The mean time from submission to first decision is 58 days. Time from acceptance to publication online is less than or equal to 3 months and from acceptance to publication in print is less than or equal to 5 months.
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