In vivo passive mechanical properties of skeletal muscle improve with massage-like loading following eccentric exercise.
In vivo passive mechanical properties of skeletal muscle improve with massage-like loading following eccentric exercise.
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骨骼肌的体内被动机械性能通过偏心运动后按摩样负载改善。
DOI：
10.1016/j.jbiomech.2012.08.008
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发表时间：
2012-10-11
影响因子：
2.4
通讯作者：
Zhao Y
中科院分区：
文献类型：
--
作者：
Haas C;Best TM;Wang Q;Butterfield TA;Zhao Y
采用准线性粘弹性（QLV）模型研究骨骼肌在损伤性离心运动后对重复按摩样压缩负荷（MLL）的被动时变响应。用双侧腓总神经袖套刺激6只成年家兔后肢胫前肌。离心运动后，将家兔随机分配至模拟深度刮除（0.5 Hz，10 N，持续15 min或30 min）的4天MLL方案。对侧后肢作为行使，无MLL控制两个MLL条件。运动前、运动后第1天、MLL前和运动后第1天至第4天的肌肉粘弹性用斜升-保持试验测定。运动后即刻弹性反应（AG 0）增加（p <0.05），而15 min和30 min四天MLL方案均降低（p<0.05）。与无MLL组（第4天，222.0%）（p <0.05）相比，MLL后4天的标准化AG 0从运动后（第1天，248.5%）降低到MLL后（第4天，98.5%）（p<0.05）。运动和4天MLL对快、慢松弛系数无急性或累积效应（p>0.05）。这是第一个实验证据的影响，急性（每日）和累积的变化，强烈行使肌肉由于离体MLL的粘弹性。它为将被动肌肉特性与手动治疗的机械效果相关联提供了一个起点，并可能为按摩方案的设计和优化提供帮助。
A quasi-linear viscoelasticity (QLV) model was used to study passive time-dependent responses of skeletal muscle to repeated massage-like compressive loading (MLL) following damaging eccentric exercise. Six skeletally mature rabbits were surgically instrumented with bilateral peroneal nerve cuffs for stimulation of the hindlimb tibialis anterior (TA) muscles. Following the eccentric exercise, rabbits were randomly assigned to a four-day MLL protocol mimicking deep effleurage (0.5 Hz, 10 N for 15 min or for 30 min). The contralateral hindlimb served as the exercised, no-MLL control for both MLL conditions. Viscoelastic properties of the muscle pre-exercise, post-exercise on Day 1, and pre- and post-MLL Day 1 through Day 4 were determined with ramp-and-hold tests. The instantaneous elastic response (AG0) increased following exercise (p <0.05) and decreased due to both the 15 min and 30 min four-day MLL protocols (p<0.05). Post-four days of MLL the normalized AG0 decreased from post-exercise (Day 1, 248.5%) to the post-MLL (Day 4, 98.5%) (p<0.05), compared to the no-MLL group (Day 4, 222.0%) (p<0.05). Exercise and four-day MLL showed no acute or cumulative effects on the fast and slow relaxation coefficients (p>0.05). This is the first experimental evidence of the effect of both acute (daily) and cumulative changes in viscoelastic properties of intensely exercised muscle due to ex vivo MLL. It provides a starting point for correlating passive muscle properties with mechanical effects of manual therapies, and may shed light on design and optimization of massage protocols.
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影响因子：
4.1
作者：
Butterfield TA;Zhao Y;Agarwal S;Haq F;Best TM
通讯作者：
Best TM
影响因子：
3.3
作者：
Butterfield, TA;Herzog, W
通讯作者：
Herzog, W
影响因子：
2.4
作者：
Bosboom, EMH;Hesselink, MKC;Baaijens, FPT
通讯作者：
Baaijens, FPT
DOI：
10.1016/s0003-9993(96)90087-8
发表时间：
1996-04-01
影响因子：
4.3
作者：
Magnusson, SP;Simonsen, EB;Kjaer, M
通讯作者：
Kjaer, M
影响因子：
2.4
作者：
POUSSON, M;VANHOECKE, J;GOUBEL, F
通讯作者：
GOUBEL, F