Year: 2015
Type: article
Abstract: The increased popularity of high-intensity intermittent training (HIIT) has stimulated research that seems to support the idea that a greater fatigue resistance and/or recovery ability is demonstrated in women vs. men during this mode of exercise.The purpose of this study was to identify if a sex-specific response to HIIT would influence metabolic pathway contribution between men and women when working at a similar relative intensity.Seventeen well-trained men and women performed three total trials consisting of a VO 2 max test and two trials of repeated treadmill sprints at 110% vVO 2 max.Both trials consisted of four sets of 4, 30-sec sprints interspersed with three minutes of passive recovery between each set.The counterbalanced trials only differed by rest period duration between sprints: 30-sec recovery (30:30 trial) and 15-sec recovery (30:15 trial).VO 2 (via indirect calorimetry) was measured during all sprints and recovery periods along with a 10-min post-exercise recovery to estimate oxidative pathway contribution during work and EPOC.The glycolytic component was measured via change in blood lactate concentration by drawing a sample of blood two minutes into the recovery stage of each set.A 2 (sex) x 4 (sprint sets) repeated measures ANOVA revealed that men significantly consumed more kCals than women in both trials (p < 0.01); however, relative contribution of energy pathway (i.e., percentage of oxidative, glycolytic, and EPOC to total energy expenditure) did not reveal differences between men and women in either trial.One-way ANOVAs showed women demonstrate consistently higher heart rates and ratings of perceived exertion (p ≤ 0.03) throughout the trials than men.Session rating of perceived Aerobic Contribution ..................
Author: Kaitlyn J. Kielsmeier
Institution: Bowling Green State University
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2884275976