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interval exercise
Also known as: interval exercise task
Facts (15)
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Sex differences in the cardiopulmonary and neuromuscular ... biorxiv.org Nov 11, 2024 15 facts
measurementTen males and ten females with an average age of 25±3 years participated in a study comparing physiological responses to interval exercise.
referenceInterval exercise is a training method prescribed to enhance aerobic and anaerobic capacity, as described by Laursen & Jenkins (2002).
measurementIn absolute values, males had greater minute ventilation (E) throughout an interval exercise task compared to females (p < 0.001).
measurementThere were no main effects of sex (p = 0.330) or sex × time interaction effects (p = 0.710) observed for RER (Respiratory Exchange Ratio) during an interval exercise task.
measurementDuring an interval exercise task, there were no main effects of sex observed for heart rate (p = 0.601), RPE (p = 0.497), or blood lactate (p = 0.203).
claimBillaut & Bishop (2012) suggested that the lesser fatigue experienced by females during interval exercise is related to lower absolute mechanical work.
measurementWhen expressed relative to peak values, there were no sex differences in the oxygen uptake (VO2) or carbon dioxide production (VCO2) response to the interval exercise task (p≥0.781).
claimThere were no sex differences in the reductions of maximal voluntary contraction (MVC), quadriceps potentiated twitch (Qtw.pot), and voluntary activation (VA) during the interval exercise task (p≥0.150).
measurementDuring an interval exercise task, heart rate, RPE (Rate of Perceived Exertion), and blood lactate levels increased progressively over time for both sexes (p < 0.001).
claimResearch investigating sex differences in response to interval exercise typically utilizes repeated sprints of 5-6 seconds interspersed with 25-30 seconds of rest, as noted by Brooks et al. (1990) and Billaut & Smith (2009).
referenceThe intention of interval exercise, as described by Jones & Vanhatalo (2017), is to intersperse severe intensity bouts with periods of moderate intensity recovery or rest to repeatedly elicit a state of metabolic stress.
claimLonger duration intervals are typically prescribed at submaximal, supra-threshold intensities, such as 2-6 minutes at 3 km-10 km race pace, according to Parmar et al. (2021).
measurementA sex × time interaction effect was observed for heart rate during an interval exercise task (p = 0.028), where females had a greater heart rate at the end of the warmup compared to males (p = 0.041), but no significant differences were observed at other time points.
measurementWhen O2 and CO2 values were expressed as a percentage of peak values from an incremental exercise test, there were no main effects of sex (p ≥ 0.631) or sex × time interaction effects (p ≥ 0.781) observed during an interval exercise task.
claimFemales experienced greater hyperpnoea during the initial stages of interval exercise and had lesser decreases in contractile function post-exercise compared to males.