A Study on Physical Fitness Index and Predicted Maximum Aerobic Capacity (VO2 Max) Among Young Male Individuals
Abstract
Introduction: There is increased prevalence of
obesity among adolescents due to sedentary life style, faulty
food habits and lack of physical activity. Overweight and
obesity are associated with hemodynamic changes at rest.
Whether these changes are reflected in exercise needs to
be ascertained. Physical Fitness Index (PFI) is one of the
important criteria to assess the cardiopulmonary efficiency of
a subject. This study was aimed to find out whether or not
obesity affects cardiovascular functional abilities in young
male individuals. Aim: The aim of the study is to assess and
compare the cardiovascular response to exercise in young
normal weight and over-weight subjects by comparing
Physical Fitness Index (PFI) score obtained by Astrand
Ryhming Step Test and predicted VO2 max value obtained
using Astrand Ryhming Nomogram method. Method: 60
male medical students in the age group of 18-20 years were
selected consisting of 30 over-weight subjects and 30
normal weight subjects as determined by their Body Mass
Index (BMI). For Astrand Ryhming Step Test, the subjects
were asked to step up and down on an 40 cm (16 inch) high
platform at a rate of 22 cycles per minute for 5 minutes.
Physical Fitness Index score calculated. Predicted VO2 max
calculated from Astrand Ryhming Nomogram. Observations
and Results: PFI score and predicted VO2 max value
between two groups were analyzed using student t test and
found to be statistically significant (p value <0.05). There is
significant negative correlation between BMI and PFI score
(r value = -0.417, p value <0.05), BMI and predicted VO2
max. (r value = -0.607, p value <0.05). Conclusion: This
study shows that young overweight individuals have a
poorer cardiovascular response to exercise as compared to
normal individuals. The results of this study emphasizes the
need for early identification of the risk factors leading to
excessive weight gain and initiation of preventive measures
in order to prevent the deterioration of cardiovascular
performance in susceptible young adults.
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