de Freitas Marcelo Conrado, de Souza Pereira Caroline Galan, Batista Vitor Cabrera, Rossi Fabricio Eduardo, Ribeiro Alex Silva, Cyrino Edilson Serpeloni, Cholewa Jason M, Gobbo Luís Alberto
Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil.
Post Graduation Program in Movement Sciences, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil.
J Exerc Rehabil. 2019 Feb 25;15(1):148-154. doi: 10.12965/jer.1836534.267. eCollection 2019 Feb.
The aim of this study was to compare the effects of linear periodization (LP) versus nonperiodized (NP) resistance training on upper-body isometric force and skeletal muscle mass (SMM) in sarcopenic older adults. Twenty sarcopenic older adults were randomly assigned into the LP and NP groups and performed 16 weeks of resistance training. The SMM was measured by octopolar bioelectrical impedance. The isometric force for handgrip and trunk were assessed by dynamometer. Evaluations were performed at baseline, after 4, 8, 12, and 16 weeks of resistance training. For total weight lifted, there was a main effect for time (=126.986, <0.001), statistically significant difference between condition (=13.867, =0.001) and interaction (=8.778, <0.001), whereby total weight lifted was greater for NP after 4 months of training. Isometric force for handgrip and trunk increased across time (<0.001) but no significant differences between groups or interaction were observed (>0.05). The SMM increased across time (<0.05), however no significant difference between groups or interaction were observed (>0.05). There were strong and significant correlations between handgrip maximum force and SMM (LP: rho=0.79, =0.004 vs. NP: rho=-0.43, =0.244) and handgrip mean force and SMM (LP: rho=0.68, =0.021 vs. NP: rho=-0.37, =0.332) only for the LP group. In conclusion, LP and NP resistance training induced similar benefits on upper-body isometric force and SMM in sarcopenic older adults. However, LP presented lower total weight lifted, suggesting that it is possible to obtain similar gains in isometric force and SMM with less total work.
本研究的目的是比较线性周期化（LP）与非周期化（NP）抗阻训练对肌肉减少症老年男性上身等长肌力和骨骼肌质量（SMM）的影响。20名患有肌肉减少症的老年男性被随机分为LP组和NP组，并进行了16周的抗阻训练。通过八极生物电阻抗测量SMM。用测力计评估握力和躯干的等长肌力。在抗阻训练的基线、4周、8周、12周和16周后进行评估。对于总举重量，时间存在主效应（F = 126.986，P < 0.001），训练条件之间存在统计学显著差异（F = 13.867，P = 0.001）以及交互作用（F = 8.778，P < 0.001），即训练4个月后NP组的总举重量更大。握力和躯干的等长肌力随时间增加（P < 0.001），但未观察到组间或交互作用的显著差异（P > 0.05）。SMM随时间增加（P < 0.05），然而未观察到组间或交互作用的显著差异（P > 0.05）。仅在LP组中，握力最大肌力与SMM之间（LP组：rho = 0.79，P = 0.004；NP组：rho = -0.43，P = 0.244）以及握力平均肌力与SMM之间（LP组：rho = 0.68，P = 0.021；NP组：rho = -0.37，P = 0.332）存在强且显著的相关性。总之，LP和NP抗阻训练对肌肉减少症老年男性的上身等长肌力和SMM产生了相似的益处。然而，LP组的总举重量较低，这表明可以用较少的总训练量获得相似的等长肌力和SMM增长。
