Inspiratory Muscles Experience Fatigue Faster Than Calf Muscles During Treadmill Marching

“The aim of this study was to determine whether treadmill marching exercise induces respiratory muscle fatigue, and to compare the extent and rate of respiratory muscle fatigue to those of the calf musculature.

Conclusion:

“Results indicated that:

  1. the inspiratory and calf muscles are the ones experiencing the most dominant fatigue during treadmill marching
  2. the rate of fatigue of each muscle group was monotonic between the initial and terminal phases of exercise
  3. the inspiratory muscles fatigue significantly faster than the calf at the terminal phase of exercise, and are likely to fatigue faster during the initial exercise as well.

Accordingly, this study supports the hypothesis that fatigue of the inspiratory muscles may be a limiting factor during exercise.”

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