The Relationship of Physical Activity and Fitness between Ages

摘要

The aim of this study is to investigate the nature and magnitude of the relationship between self-reported physical activity and fitness and the extent to which the association varies with religion. A total of 112 subjects focused on the student population of Birmingham University undergone fitness testing by bicycle ergometer, body composition and self-reported health questionnaire. The research was conducted in cross-sectional design. Age (3%), vigorous exercise (15%), and % body fat (42%) predicted VO _( 2max ) corrected for weight. When the sample was split into young and old participants, time spent in vigorous exercise and a measure of body composition predicted aerobic fitness in both cohorts, accounting for 50% of the variation in VO _( 2max ) in the younger cohort but only 37% in the older cohort. With VO _( 2max ) uncorrected for body weight, the strongest predictor was estimated total energy expenditure in physical activity, accounting for 38% of the variance in both cases. The VO _( 2max ) declined with age by 0.31 ml · kg ~( -1 ) · min ~( -1 ) per year. Percentage body fat and BMI increased with age, by 0.48% per year and 0.16 kg · m ~( -2 ) per year, respectively. Moderate exercise increased with age as vigorous exercise decreased, yielding no net change in the total time spent exercising. Again, for weight corrected VO _( 2max ) it was vigorous exercise and % body fat that predicted. This study is important in helping individuals create a new lifestyle of health as well as a guide to all of the importance of physical activity that is able to prolong the life of the individual.