This review proposes that physical inactivity could be considered a behavior selected by
evolution for resting, and also selected to be reinforcing in life-threatening situations in …

This review focuses on how blood flow to contracting skeletal muscles is regulated during
exercise in humans. The idea is that blood flow to the contracting muscles links oxygen in …

Importance Adverse cardiovascular findings associated with habitual vigorous exercise
have raised new questions regarding the benefits of exercise and fitness. Objective To …

The human body is designed for activity. For most of our history, physical activity was
required for survival, but technological advances have eliminated much of the need for hard …

SUMMARY ACSM Position Stand on The Recommended Quantity and Quality of Exercise
for Developing and Maintaining Cardiorespiratory and Muscular Fitness, and Flexibility in …

Background—The ability of older persons to function independently is dependent largely on
the maintenance of sufficient aerobic capacity and strength to perform daily activities …

BACKGROUND The relative contributions of decreases in maximal heart rate, stroke
volume, and oxygen extraction and of changes in body weight and composition to the age …

Long-term endurance training significantly influences how the autonomic nervous system
controls heart function. Endurance training increases parasympathetic activity and …

Increased life expectancy combined with the aging baby boomer generation has resulted in
an unprecedented global expansion of the elderly population. The growing population of …

Background. Identification of the physiologic factors most relevant to functional
independence in the elderly population is critical for the design of effective interventions. It …