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Updated: Jan 13, 2026

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
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Variation in cycling exercise mechanical efficiency in the HERITAGE Family Study.

Angelo Tremblay1,2, Claude Bouchard3, Mark A Sarzynski4

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Cycling exercise mechanical efficiency (ME) improves with training in nonathletes, comparable between sexes. Improved ME correlates with better body composition and glycemic control, independent of fitness levels.

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Area of Science:

  • Exercise Physiology
  • Human Performance
  • Metabolic Health

Background:

  • Mechanical efficiency (ME) in cycling is crucial for endurance performance.
  • Understanding factors influencing ME, such as training, sex, and body composition, is important.
  • Previous research has not fully elucidated the determinants of ME in diverse populations.

Purpose of the Study:

  • To assess the impact of endurance exercise training and sex on cycling mechanical efficiency (ME).
  • To explore associations between ME and body composition, glycemic profile, and skeletal muscle characteristics.
  • To determine if ME is trainable in sedentary individuals.

Main Methods:

  • Study included 371 males and 465 females from European and African descents.
  • Participants underwent a 20-week controlled endurance exercise program.
  • Substudy examined skeletal muscle traits and ME variations in 78 participants.

Main Results:

  • Training increased ME by 4%-5%, with similar improvements in males and females.
  • Higher ME was linked to lower body weight, fat mass, fasting glucose, and insulin, irrespective of cardiorespiratory fitness.
  • No significant associations were found between ME and muscle fiber type, capillarity, or enzymatic profiles.

Conclusions:

  • Cycling exercise mechanical efficiency (ME) is trainable in nonathletes.
  • Variations in ME are associated with favorable body composition and glycemic profiles, both in sedentary states and after training.
  • Further research is needed to identify the biological determinants of ME.