Vol. 7, Issue 8, Part E (2021)

Abstract
Overweight is to weigh more than a standard weight for one’s height and age. Excessive body fat reflects the association of a person’s eating habits with his or her energy use and storage. BMI in overweight ranges between 25.0 - 29.9. Overweight are defined as abnormal or excessive fat accumulation that may impair health [1]. Excess weight may increase the risk for many health problems, including, type 2 diabetes, high blood pressure, heart disease and strokes, certain types of cancer, sleep apnea, osteoarthritis, fatty liver disease, kidney disease, pregnancy problems, such as high blood sugar during pregnancy, high blood pressure, and increased risk for caesarean delivery (C- section). The prevalence of overweight in India is increasing faster than the world average. For instance, the prevalence of overweight increased from 8.4% to 15.5% among women between 1998 and 2015, and the prevalence of obesity increased from 2.2% to 5.1% over the same period. Physiological cost index is the measure of energy cost of walking. It uses heart rate to indicate the energy cost of walking. The measurement relies on the assumption that heart rate is linearly related to oxygen expenditure (vo2) 3 items: resting heart rate, working heart rate, and walking speed. The PCI is an easy to use valid and reliable measure of energy expenditure and it is recommended as a useful tool for physiotherapist in the assessment and evaluation of functional performance. The relation of BMI and PCI was studied and, the underweight and normal BMI participants have PCI which was lower than the overweight individual. The speed of walking was decreased as BMI increased normal BMI participants have PCI which was lower than the overweight and obese individual. The speed of walking was decreased as BMI increased. Hence, it can be concluded that as BMI increases, the PCI increases which suggested poor economy. The energy expenditure was directly proportional to body weight. Plyometric training (PT) is a very popular form of physical conditioning of healthy individuals. Plyometrics is a training technique used to increase strength and explosiveness. Conclusion: This study concluded 4 weeks of plyometrics training, decrease in PCI value.