1MPT (Cardiopulmonary), Department of Physiotherapy, Max Super Specialty, Hospital, New Delhi, India
2Assistant Professor, Department of Rehabilitation Sciences, HIMSR, Jamia Hamdard, Deemed University, New Delhi, India
*Corresponding author: Deepak Malhotra, Assistant Professor, Department of Rehabilitation Sciences, Hamdard Institute of Medical Sciences and Research, Jamia Hamdard, Deemed University, New Delhi-110062, India, Ph. +91-9871-666-669, Email- drdeepakphysio@gmail.com
Online published on 16 January, 2018.
Resistance training in the form of concentric and eccentric exercise is a highly recommended form of exercise for athletes and also for individuals with or at risk of developing cardiovascular disease. The purpose of this study was to compare the effect of exercise intensity on cardiovascular changes during concentric and eccentric resistive knee extension exercise in adults under isotonic condition.
A sample of 60 healthy subjects between the age group (20–30 years) was selected for the study. Each subject performed concentric resistive knee extension exercise at 85% of 1RM and 75% of 1RM and eccentric resistive knee extension exercise at 85% of 1RM of concentric + 30% of 1RM and 75% of 1RM of concentric + 30% of 1RM on Biodex multijoint exercise system 4 pro. Same numbers of repetitions were performed for concentric and eccentric contractions. SBP, DBP, HR, MAP were measured before and after each exercise.
Statistical analysis was done using single sample t-test. The results of the study indicate that there is difference in cardiovascular response at different intensities of concentric and eccentric activity. More variations are seen in cardiovascular variables after concentric activity at respective intensities as compared to eccentric activity.
The result of the study suggests that eccentric exercise produce lower cardiovascular response than concentric exercise.
cardiovascular variables, concentric, eccentric, exercise intensity resistance exercise
