The Effect of two Type Resistance Exercise on Biomarkers of Cardiac Injury in Trained Athletes [In Persian]

چکیده مقاله

Abstract

resistance exercise to failure along with the rapid development of muscle and physical fitness. The purpose of the present study is to investigate effect of exercise to failure sets and cluster sets on biomarkers of cardiac injury. Methods: Twelve trained male athletes with a mean age of 23.20 ± 2.25 years were voluntarily selected. Two kinds of exercises’ concentric failure sets and cluster sets done separately with pre-test and 30 minutes, 4, 12 and 24 hours follow-up. Both failure sets and cluster sets include nine exercises with a weight in equal intensity zone (12-15RM) and training volumes. Result: in final cycling of exercise both protocols has shown decreased in mean heart rate, especially in cluster sets this decrease with high effect size (ES) (d = 0.99) was most obviously (P <0.05). Only in the first period of monitoring, perceived exertion level was different and which was higher in concentric failure sets ES (d = -3.59) (P <0.05). hscTnI mean after the intervention, at the 24 hours later monitoring showed large ES (d = 0.90) in failure sets (P <0.05). During all periods of two protocol follow up (with the exception of a 24-hour monitoring) a cardiac Nt-proBNP elevated above the baseline levels, which peaked 4 hours later monitoring with ES (d = 1.35) in failure sets. Conclusion: Performing resistance exercise to failure increases the biomarkers of cardiac injury levels and 24-hour recover period may not be sufficient.

Keywords

• cluster sets resistance exercise
• exercise volume index
• high sensitivity Cardiac Troponin I (hscTnI)
• N-terminal proBNP (NT-proBNP)
• resistance exercise to concentric failure