Peak anaerobic power in elderly men

Area of Science:

• Gerontology
• Exercise Physiology
• Muscle Physiology

Background:

• Aging is associated with a decline in muscle function, including maximal anaerobic power (Pmax).
• The influence of habitual physical activity (PA) and maximal oxygen consumption (VO2max) on age-related Pmax decline in older men requires further investigation.
• Understanding these relationships is crucial for maintaining functional independence in older adults.

Purpose of the Study:

• To assess the relationship between Pmax and optimal shortening velocity (vopt) with age, habitual PA, and VO2max in healthy older men.
• To compare these relationships with those observed in young men.
• To determine factors influencing Pmax decline in aging.

Main Methods:

• 37 healthy older men (71.1 years) and 16 young men (22.7 years) participated.
• Pmax and vopt were measured using a friction-loaded non-isokinetic cycle ergometer.
• PA was assessed via questionnaire; VO2max was measured.

Main Results:

• Pmax declined significantly with age (8.3% per decade relative to body mass; 5.9% per decade relative to quadriceps mass).
• Older men showed a negative correlation between Pmax and age.
• Ergometer measurements were not correlated with PA or VO2max, though VO2max was positively associated with PA.

Conclusions:

• Habitual physical activity does not attenuate the age-related decline in quadriceps Pmax in healthy older men.
• Age is the primary predictor of Pmax decline in this population.
• Sex differences may exist in the determinants of Pmax in healthy older adults.