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Area of Science:

  • Exercise Physiology
  • Cardiovascular Physiology
  • Skeletal Muscle Physiology

Background:

  • Leg order in sequential single-leg cycling may alter muscular responses and adaptations.
  • Understanding these differences is crucial for optimizing training protocols.

Purpose of the Study:

  • To investigate cardiovascular and skeletal muscle hemodynamic responses during double-leg cycling (DLC) versus sequential single-leg cycling (SSLC).

Main Methods:

  • Ten healthy adults performed 1-min intervals of DLC and SSLC with passive recovery.
  • Measurements included oxygen consumption, heart rate, blood pressure, muscle oxygenation, muscle blood volume, and power output.

Main Results:

  • Mean arterial pressure was higher during DLC than SSLC and higher in the initial vs. second SSLC set.
  • Muscle blood volume increase was similar between active single leg and double leg.
  • Muscle blood volume changes differed significantly between the first and second SSLC sets.

Conclusions:

  • The sequence of leg engagement in SSLC affects local hemodynamic responses.
  • The inactive limb influences the training stimulus of the contralateral active limb.