Evaluation of the strength-size relationship in vivo using various muscle size indices
Evaluation of the strength-size relationship in vivo using various muscle size indices
复制标题
DOI：
10.1097/00005768-200007000-00019
复制
发表时间：
2000-07-01
期刊：
影响因子：
--
通讯作者：
Hunter, GR
中科院分区：
文献类型：
--
作者：
Bamman, MM;Newcomer, BR;Hunter, GR
目的：人们普遍认为最大力量与肌肉大小有关。本研究的主要目的是确定人体测量法或双能x线吸收测量法（DEXA）对肌肉大小的估计是否能有效预测足底屈肌最大自主收缩（MVC）强度，并可替代更复杂的技术（如磁共振成像（MRI））。此外，我们比较了MVC和三种mri确定的肌肉大小测量之间的关系；解剖（ACSA）和生理（PCSA）横截面积；肌肉体积（VOLm）。方法：测量1.83 rad时的足底屈肌MVC和肌肉大小的各项指标：1)体重，2)全身瘦质量（LM） （DEXA）， 3)小腿LM （DEXA）。4) 39名绝经前妇女（平均±标准差：36±8岁，165±6厘米，65±9公斤）的小腿围，5)围围和小腿皮肤褶估算的肌肉+骨横截面积（CSA）， 6)三头肌表面ACSA， 7)三头肌表面PCSA，和(8)三头肌表面体积（VOLm）。结果：MVC与全身LM （r = 0.365）、下肢LM （r = 0.381）、周长（r = 0.584）、估计肌肉+骨骼CSA （r = 0.447）、ACSA （r = 0.733）、PCSA （r = 0.715）、VOL （r = 0.649）之间存在显著的零级相关（P < 0.05）。通过Fisher z变换，ACSA和PCSA与MVC的相关性显著高于人体测量指数和DEXA指数（P < 0.05）。此外，只有ACSA和PCSA回归到原点，表明这两种测量方法预测MVC的能力最强。结论：与全肢人体测量和DEXA指数相比，mri测定的三头肌表面肌肉尺寸指数与力量的相关性更好。在这组女性中，ACSA和PCSA在预测强度方面都优于VOLm。没有发现PCSA比ACSA更精确。ACSA似乎提供了足够的精度估计足底屈肌特定张力在体内。
Purpose: It is well accepted that maximum strength is related to muscle size. The primary purpose of this study was to determine whether anthropometric or dual-energy x-ray absorptiometry (DEXA) estimates of muscle size were valid predictors of plantar flexor maximum voluntary contraction (MVC) strength and could be used in lieu of more sophisticated techniques (e.g., magnetic resonance imaging (MRI)). Additionally, we compared the relationship among MVC and three MRI-determined muscle size measures; anatomical (ACSA) and physiological (PCSA) cross-sectional areas; and muscle volume (VOLm). Methods: We measured plantar flexor MVC at 1.83 rad and various indices of muscle size: 1) body weight, 2) total body lean mass (LM) (DEXA), 3) lower leg LM (DEXA). 4) lower leg circumference, 5) estimated muscle+bone cross-sectional area (CSA) from circumference and calf skin-fold, 6) triceps surae ACSA, 7) triceps surae PCSA, and (8) triceps surae volume (VOLm), in 39 premenopausal women (mean +/- SD: 36 +/- 8 yr, 165 +/- 6 cm, and 65 +/- 9 kg). Results: Zero-order correlations showed significant (P < 0.05) associations between MVC and total body LM (r = 0.365), lower leg LM (r = 0.381), circumference (r = 0.584), estimated muscle+bone CSA (r = 0.447), ACSA (r = 0.733), PCSA (r = 0.715), and VOL, (r = 0.649). By using the Fisher Z-transformation, ACSA and PCSA correlated significantly higher with MVC (P < 0.05) than anthropometric and DEXA indices. Further, only ACSA and PCSA regressed to the origin, indicating the ability to predict MVC was greatest with these two measures. Conclusions: The MRI-determined muscle size indices, which were specific to the triceps surae, correlated with strength better than whole limb anthropometric and DEXA indices. In this group of women, both ACSA and PCSA appeared superior to VOLm for predicting strength. PCSA was not found to be more precise than ACSA. ACSA appears to provide adequate precision for estimating plantar flexor specific tension in vivo.