  The aim of this study was to investigate the age dependence of the fitness
and body mass index (BMI) in Korean adults and to find an effective exercise to
restore the degradation of fitness due to aging. The age dependence of the
fitness and BMI were calculated using their lump mean values (LMVs) and a
linear regression method. The fitness sensitivity percentage to age (FSPA) and
fitness sensitivity percentage to BMI (FSPB) were introduced as indicators for
the effective improvement of the fitness. The results showed that the
degradation of fitness due to aging, especially the degradation of
cardiorespiratory endurance and muscular endurance, could be improved
effectively by controlling the 20-m multi-stage shuttle run and sit-up scores
for both males and females. The results also showed that the BMIs could be
effectively controlled with enhancing the 10-m shuttle run and standing long
jump scores for both males and females. It is expected that the LMV, FSPA, and
FSPB could be used to improve fitness effectively and to establish personal
exercise aims.
