Acute Effects of Whole-Body Electromyostimulation on Energy Expenditure at Resting and during Uphill Walking in Healthy Young Men Pérez de Arrilucea Le Floc'h, Unai A. Dote Montero, Manuel Carle Calo, Abraham Sánchez Delgado, Guillermo Ruiz Ruiz, Jonatan Amaro Gahete, Francisco José Energy metabolism Respiratory exchange ratio Impulse frequencies Whole-body electromyostimulation The effects of the different electrical frequencies of whole-body electrical stimulation (WB-EMS) on energy expenditure (EE) and the respiratory exchange ratio (RER) remain poorly understood. This study aimed to determine the effects of different WB-EMS electrical frequencies on EE and the RER during supine resting and uphill walking. A total of 10 healthy and recreationally active men (21.6 +/- 3.3 years old) participated in the present study. Participants completed two testing sessions in a randomized order. In each session, a variety of impulse frequencies (1 hertz (Hz), 2 Hz, 4 Hz, 6 Hz, 8 Hz, and 10 Hz) were applied in a randomized order, allowing a 10 min passive recovery between them. Oxygen consumption and carbon dioxide production were measured to calculate EE and the RER. All frequencies increased EE at rest (all p <= 0.001), with 4 Hz being the frequency producing the highest increase (Delta = 8.89 +/- 1.49 kcal/min), as did 6 Hz (Delta = 8.05 +/- 1.52 kcal/min) and 8 Hz (Delta = 7.04 +/- 2.16 kcal/min). An increment in the RER at rest was observed with 4 Hz, 6 Hz, 8 Hz and 10 Hz (all p <= 0.016), but not with 1 Hz and 2 Hz (p >= 0.923). During uphill walking, the frequency that elicited the highest increase in EE was 6 Hz (Delta = 4.87 +/- 0.84 kcal/min) compared to the unstimulated condition. None of the impulse frequencies altered the RER during uphill walking. WB-EMS increases EE in healthy young men both during resting and uphill walking. 2022-10-17T11:55:57Z 2022-10-17T11:55:57Z 2022-08-24 journal article Perez-De-Arrilucea-Le-Floc’h, U.A... [et al.]. Acute Effects of Whole-Body Electromyostimulation on Energy Expenditure at Resting and during Uphill Walking in Healthy Young Men. Metabolites 2022, 12, 781. [https://doi.org/10.3390/metabo12090781] https://hdl.handle.net/10481/77359 10.3390/metabo12090781 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional MDPI