Effects of age on human muscle torque, velocity, and power in two muscle groups

  • Lanza I
  • Towse T
  • Caldwell G
 et al. 
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The purpose of this study was to test the hypotheses that, under isovelocity conditions, older compared with young humans would 1). be slower to reach target velocity and 2). exhibit a downward shift in the torque-velocity and power-velocity relationships in the ankle dorsiflexor and knee extensor muscles. We studied 12 young (26 +/- 5 yr, 6 men/6 women) and 12 older (72 +/- 6 yr, 6 men/6 women) healthy adults during maximal voluntary concentric contractions at preset target velocities (dorsiflexion: 0-240 degrees /s; knee extension: 0-400 degrees /s) using an isokinetic dynamometer. The time to target velocity was longer in older subjects in the dorsiflexors and knee extensors (both P

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  • I. R. Lanza

  • T. F. Towse

  • G. E. Caldwell

  • D. M. Wigmore

  • J. A. Kent-Braun

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