Key result
Lower limb 10-repetition maximum testing strongly reduces RMSSD 15 minutes postexercise versus baseline.
Why the study?
The acute heart rate variability behavior after 10 repetitions maximum load test for lower limbs in normotensive subjects was not well characterized.
Does a 10 repetitions maximum load test for lower limbs alter heart rate variability in normotensive recreationally trained women?
Does a 10 repetitions maximum load test for lower limbs alter heart rate variability in normotensive recreationally trained women?
Effect estimate: effect size -1.3
p-value: p=0.010
A 10-repetition maximum load test for lower limbs does not generate exacerbated postexercise sympathetic activity in healthy women, suggesting it is safe for cardiovascular healthy individuals.
International Journal of Exercise Science 11(6): 834-843, 2018. The purpose of this study was to analyze the acute heart rate variability behavior after 10 repetitions maximum load test for back squat, leg press, leg extension, and leg flexion in normotensive subjects. Eight recreationally trained women (age: 21.8 ± 2.2 yrs; height: 167.6 ± 6.3 cm; weight: 61.6 ± 10.1 kg) performed two 10 repetitions maximum testing days with 48-hours rest between each one. Heart rate variability was measured in baseline and postexercise (15-, 30-, 45-, and 60-minutes) for time and frequency domain. A significant difference was identified in RMSSDms (p = 0.010; effect size = -1.3), MRRms (p = 0.026; effect size = -1.3), MHR (p = 0.006; effect size = 1.4), and PNN50% (p = 0.006; effect size = -1.6) when compared 15 minutes postexercise with baseline. For all others comparison and index were no differences (p > 0.05). The present study demonstrates that load test, although works with maximum intensities, did not generate an exacerbated postexercise sympathetic activity. Thus, it seems to be safe for cardiovascular healthy individuals. As a practical application, these results can encourage exercise practitioners to do a maximum load test to resistance training loads prescription.
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Monteiro et al. (2018) studied Normotensive (n=8). 10 repetitions maximum load test for lower limbs vs. Baseline was evaluated on Heart rate variability (RMSSDms) at 15 minutes postexercise (effect size -1.3, p=0.010). A 10 repetitions maximum load test for lower limbs significantly reduced RMSSDms at 15 minutes postexercise compared to baseline (effect size -1.3; p=0.010).
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