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Effects of eccentric exercise on cycling efficiency.

Joaquin Sanchis Moysi1, Jerónimo Carmelo Garcia-Romero, José Ramón Alvero-Cruz

  • 1Departamento de Educacion Fisica, Campus Universitario de Tafira, Las Palmas de Gran Canaria, Canary Islands, Spain.

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquee
|September 1, 2005
PubMed
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Eccentric squatting exercise minimally impacts cycling efficiency, even with significant muscle soreness. This study found no major impairment in gross cycling efficiency following eccentric exercise protocols.

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Muscle Physiology

Background:

  • Eccentric exercise is known to cause muscle damage and soreness.
  • The impact of eccentric exercise on the efficiency of subsequent concentric muscle contractions is not fully understood.
  • Understanding these effects is crucial for optimizing training programs and athletic performance.

Purpose of the Study:

  • To investigate whether eccentric squatting exercise impairs the efficiency of concentric muscle contraction during cycling.
  • To determine the effects of eccentric exercise on maximal voluntary contraction (MVC) and cycling gross efficiency.
  • To examine the recovery of cycling performance and muscle strength after eccentric exercise.

Main Methods:

  • Two experiments were conducted with male physical education students.

Related Experiment Videos

  • Experiment 1: Cycling exercise at 65% VO(2)max interrupted by eccentric squatting (10 sets of 25 reps, 150% body mass) versus rest.
  • Experiment 2: Eccentric squatting (25 reps, 95% MVC) to exhaustion, followed by cycling performance assessment.

    • Main Results:

    • Gross cycling efficiency decreased similarly in both experimental and control conditions during Experiment 1.
    • Blood lactate was higher in the eccentric exercise condition, but substrate oxidation and MVC reduction were similar.
    • Despite muscle soreness, cycling efficiency and VO(2) recovered within one hour after eccentric exercise in Experiment 2.

    Conclusions:

    • Eccentric exercise has minimal to no detrimental effect on gross cycling efficiency.
    • Muscle soreness induced by eccentric exercise does not significantly impair subsequent concentric exercise performance.
    • Interspersed cycling may accelerate MVC recovery after eccentric exercise.