| Title | Effect of Moderate- Versus High-Intensity Interval Exercise Training on Heart Rate Variability Parameters in Inactive Latin-American Adults: A Randomized Clinical Trial. | ||
| Author | Ramirez-Velez, Robinson; Tordecilla-Sanders, Alejandra; Tellez-T, Luis A; Camelo-Prieto, Diana; Hernandez-Quinonez, Paula A; Correa-Bautista, Jorge E; Garcia-Hermoso, Antonio; Ramirez-Campillo, Rodrigo; Izquierdo, Mikel | ||
| Journal | J Strength Cond Res | Publication Year/Month | 2020-Dec |
| PMID | 28198783 | PMCID | -N/A- |
| Affiliation + expend | 1.Center of Studies in Physical Activity Measurements, School of Medicine and Health Sciences, University of Rosario, Bogota, District Capital, Colombia. | ||
Ramirez-Velez, R, Tordecilla-Sanders, A, Tellez-T, LA, Camelo-Prieto, D, Hernandez-Quinonez, PA, Correa-Bautista, JE, Garcia-Hermoso, A, Ramirez-Campillo, R, and Izquierdo, M. Effect of moderate- versus high-intensity interval exercise training on heart rate variability parameters in inactive Latin-American adults: a randomized clinical trial. J Strength Cond Res 34(12): 3403-3415, 2020-We investigated the effect of moderate versus high-intensity interval exercise training on the heart rate variability (HRV) indices in physically inactive adults. Twenty inactive adults were randomly allocated to receive either moderate-intensity training (MCT group) or high-intensity interval training (HIT group). The MCT group performed aerobic training at an intensity of 55-75%, which consisted of walking on a treadmill at 60-80% of the maximum heart rate (HRmax) until the expenditure of 300 kcal. The HIT group ran on a treadmill for 4 minutes at 85-95% peak HRmax and had a recovery of 4 minutes at 65% peak HRmax until the expenditure of 300 kcal. Supine resting HRV indices (time domain: SDNN = SD of normal-to-normal intervals; rMSSD = root mean square successive difference of R-R intervals and frequency domain: HFLn = high-frequency spectral power; LF = low-frequency spectral power and HF/LF ratio) were measured at baseline and 12 weeks thereafter. The SDNN changes were 3.4 (8.9) milliseconds in the MCT group and 29.1 (7.6) milliseconds in the HIT group difference between groups 32.6 (95% confidence interval, 24.9 to 40.4 [p = 0.01]). The LF/HFLn ratio changes were 0.19 (0.03) milliseconds in the MCT group and 0.13 (0.01) milliseconds in the HIT group (p between groups = 0.016). No significant group differences were observed for the rMSSD, HF, and LF parameters. In inactive adults, this study showed that a 12-week HIT training program could increase short-term HRV, mostly in vagally mediated indices such as SDNN and HF/LFLn ratio power. Trial registration. ClinicalTrials.gov NCT02738385 https://clinicaltrials.gov/ct2/show/NCT01796275, registered on March 23, 2016.