METABOLIC RESPONSES DURING REPEATED DOUBLE-HYDRAULIC RESISTANCE EXERCISES AMONG DIFFERENT AGED-GROUPS

Abstract

To investigate metabolic responses during repeated agonist–antagonist muscle contractions during double–hydraulic resistance exercises (DHRE), 32 healthy males volunteer participated in this study. They were selectively divided into four aged–groups of: Group 1 (gr1, 18–24 yrs), Group 2 (gr 2, 25–34 yrs), Group 3 (gr 3, 35–49 yrs) and Group 4 (gr 4, 50–59 yrs). Metabolic responses, via energy expenditures (EE) derived
from oxygen consumption and carbon dioxide production, were assessed during repeated DHRE on five DHRE machines using progressive workload protocols from initial load (load 1, the lowest) to load 4 where subjects were asked to perform 15 repetitions at each workload. Within–group comparisons from initial values,heart rate responses increased in gr 1, 2 and 3 for shoulder press/lateral pull down, chest fly/reverse fly and
abdominal crunch/lower back extension (p<0.05) with the exception in the aged group (gr 4). Energy expenditures were higher in the aged groups (shoulder press/lateral pull down and chest fly/reverse fly at
load 3 and 4 in gr 3 (p<0.05); and shoulder press/lateral pull down at load 2 in gr 4, p<0.05). No significant differences for between–group comparisons in all variables for all exercises were detected (p>0.05). In
conclusion, energy expenditures increase during repeated DHRE as a function of progressive workload.However, these metabolic responses were not different among aged–groups during repeated DHRE, which is
possibly due to the low intensity used in this experiment.
(Journal of Sports Science and Technology 2016; 16(1) : 65-73 )
Keywords: Energy expenditure, Double–hydraulic resistance exercises, Oxygen consumption,Carbon dioxide production

*Corresponding author: Chidanan Ngamsa-ard
College of Sports Science and Technology, Mahidol University,
Phuttamonthon, Nakhonpathom, Thailand
E-mail: chidananchob@gmail.com