Autonomic function after deadlifting

Abstract

Deadlift performance may give strong affect to autonomic activity, because it lift the heaviest weight among three attempts of powerlifting game. Therefore, we studied on the change of autonomic function after deadlifting. Ten healthy male volunteers aged 30.0 ± 15.0 years were recruited in the study. The deadlifting weight was employed based at 90% of the individual’s maximum weight (90%max; 153.3 ± 31.4 kg). The electrocardiographic R-R interval variabilities (CVRRs) were analyzed using the autonomic nerve function analysis software “Kiritsu Meijin” (Crosswell Co., Yokohama, Japan). We measured the CVRRs while sitting for 2 min, at immediately standing up, and standing for 1 min immediately after deadlifting. We monitored the five autonomic parameters at three different weights of 90%max ± 5 kg. Statistical analysis was performed using analysis of variance, and multiple comparisons of Bonferroni correction were employed. Measure of the effect of 3 times deadlift with 90%max weight on autonomic function was performed, i.e. twice at day 1 and once at day 2 at more than one week later. The increase of heat rate by the 3 times deadlifting with 90%max weight was no significant when compared among the first and second times at day 1 and third times at day 2. The change in the increase of heart rate by deadlifting with 90%max ± 5 kg was increased by the increasing of weight, and that with 90%max + 5 kg was significantly increased (p＝0.039) than that with 90%max −5 kg. The score of Kiritsu Meijin at 90%max ± 0 kg deadlift was significantly decreased (p＝0.029) than that at 90%max −5 kg..