Abstract
Aim: To contrast the acute effects of whole-body electromyostimulation (WB-EMS) with sham associated with dynamic exercises on cardiovascular, ventilatory, metabolic, and autonomic responses in men with obesity and controls. Methods: A randomized cross-over and double-blind trial with nine eutrophic (23.6 years; 23 ± 1.4 kg/m2) and ten men with obesity (26 ± 4 years; 38 ± 7 kg/m2), who were randomized to receive WB-EMS-Sham or Sham-WB-EMS with 30 min of rest between protocols. WB-EMS protocol (Miha Bodytec®) was applied at the motor level, frequency = 85 Hz, pulse duration = 350 μs, cycle on = 6′; cycle off = 4′. Sham group performed the same exercises with the electric current turned off. Throughout both protocols, subjects executed two dynamic exercises of 5 minutes each (step-up and step down associated with shoulder flexion, and lunge exercise associated with elbow flexion) in the same order. R-R intervals and breath-by-breath respiratory gases analysis were collected during the protocols. Heart rate variability (HRV) indexes were obtained using linear and nonlinear analysis. The level of statistical significance was set at p < 0.05. Results: Regarding both exercises, participants with obesity presented reduced oxygen uptake, higher ventilation, respiratory rate, blood pressure, and Borg scores (p < 0.05) when contrasted with controls, as expected. However, no significant differences were found for HRV indexes between groups (p > 0.05). In addition, WB-EMS did not increase oxygen uptake or altered autonomic modulation when contrasted with sham in both groups (p < 0.05). Conclusion: Obesity has a negative impact on symptoms and functional capacity. However, WB-EMS did not acutely enhance oxygen uptake or HRV during exercise in a population with obesity.
Highlights
Obesity is associated with excessive accumulation of body fat, which has a multifactorial etiology, being attributed to genetic factors, imbalance in nutritional intake, and low energy expenditure[1]
A total of thirty-three participants were recruited, 13 participants were not eligible for the study; twenty participants were divided into two groups according to their body mass index (BMI)
Ten men with obesity concluded the protocols, 5 of which were allocated to the sham-protocol first, performing the exercises with the device turned off, and the other 5 were allocated to the whole-body electromyostimulation (WB-EMS)-protocol, starting with the device on
Summary
Obesity is associated with excessive accumulation of body fat, which has a multifactorial etiology, being attributed to genetic factors, imbalance in nutritional intake, and low energy expenditure[1]. Obesity is related to several comorbidities, such as diabetes, hypertension, and cardiovascular diseases[2] These comorbidities, alone or combined, contribute to promote impairments in cardiac autonomic control, producing altered adjustments during physical exercise[3]. Dietary guidance and physical activity programs are the main pillars of conservative treatment[4] In this context, physical exercise can increase energy expenditure and is typically included in the rehabilitation programs for the obesity population[5,6]. Physical exertion, pain, and musculoskeletal comorbidities have been common exercise barriers[10] in the population with obesity For this reason, new training strategies including technologies that could facilitate exercise training programs and improve caloric expenditure could be promising resources[11,12]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
