Knowledge Tree
high-intensity interval training
Also known as: high-intensity interval training, high-intensity interval exercise
Facts (13)
Sources
Sex differences in the cardiopulmonary and neuromuscular ... biorxiv.org Nov 11, 2024 11 facts
referenceHigh-intensity interval exercise is often prescribed to improve an individual’s O2max through positive adaptations to skeletal muscle capillary density, maximum stroke volume, cardiac output, and blood volume, according to MacInnis & Gibala (2017).
claimThere is no significant sex difference in oxygen consumption (VO2), carbon dioxide production (VCO2), respiratory exchange ratio (RER), or blood lactate levels during high-intensity interval exercise, indicating similar metabolic responses between males and females.
procedureThe high-intensity interval exercise protocol consisted of 4 intervals of 3 minutes each at 90% of vO2peak, with 90 seconds of rest between each interval.
procedureThe high-intensity interval exercise protocol used in the study consisted of 4 intervals of 3 minutes each at 90% of the final incremental test velocity (vO2peak), with 90-second rest periods between intervals.
claimThe study authors observed that females demonstrated poorer ventilatory efficiency in the first half of a high-intensity interval exercise task compared to males.
measurementDuring high-intensity interval exercise, both males and females reached oxygen consumption (VO2) values of approximately 95% of VO2peak by the final interval.
claimThe study authors observed that females demonstrated lesser reductions in knee-extensor contractile function following a high-intensity interval exercise task compared to males.
claimEvidence from cycling exercise suggests there may be perceptual, but not physiological, sex differences in the response to high-intensity interval exercise, according to Tripp et al. (2024).
claimFemales demonstrate poorer ventilatory efficiency during the first two intervals of high-intensity interval exercise compared to males, reflecting poorer matching of lung ventilation to perfusion and impaired gas exchange.
referenceA study by Tripp et al. (2024) employing 4-minute intervals with 3 minutes of rest demonstrated similar fatigability between sexes, suggesting that the specific demands of high-intensity interval exercise do not permit sex differences in fatigability to manifest.
referenceSex differences in substrate utilization are limited to steady-state exercise (moderate and heavy intensity domains) rather than the intensities used during high-intensity interval exercise, as noted by Tarnopolsky et al. (1990) and Devries et al. (2006).
Understanding Male Hormonal Changes: A Complete Guide (2025) coremedicalwellness.com Oct 21, 2025 1 fact
claimRegular physical activity, specifically resistance training and high-intensity interval training, supports healthy testosterone production in men.
Cycle Syncing Through Your Menstrual Phases trinityhealthmichigan.org Jan 20, 2025 1 fact
procedureTo manage exercise during the ovulation phase, individuals should engage in strength training or high-intensity cardio exercises like kickboxing, spinning, running sprints, or high-intensity interval training (HIIT) to take advantage of peak energy levels.