English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Extreme‐intensity exercise is described by W′ext (analogous to J′ for isometric exercise) that is smaller than W′ of severe‐intensity exercise (W′sev) in males. Sex differences in exercise tolerance appear to diminish at near‐maximal exercise, however, there is evidence of greater contributions of peripheral fatigue (i.e. potentiated twitch force; Q pot ) in males during extreme‐intensity exercise. Therefore, the current study tested the hypotheses that J′ext would not be different between males and females, however, males would exhibit a greater reduction in neuromuscular function (i.e. maximal voluntary contraction, MVC; Q pot ) following extreme‐intensity exercise. Seven males and 7 females completed three severe‐ (T lim : 2–4 min, S3; 5–8 min, S2; 9–15 min, S1) and three extreme‐intensity (70, 80, 90%MVC) knee‐extension bouts. MVC and Q pot  relative to baseline were compared at task failure and at 150 s of recovery. J′ext was significantly less than J′sev in males (2.4 ± 1.2kJ vs 3.9 ± 1.3kJ;  p  = 0.03) and females (1.6 ± 0.8kJ vs 2.9 ± 1.7kJ;  p  = 0.05); however, there were no sex differences in J′ext or J′sev. MVC (%Baseline) was greater at task failure following extreme‐intensity exercise (76.5 ± 20.0% vs 51.5 ± 11.5% in males, 75.7 ± 19.4% vs 66.7 ± 17.4% in females), but was not different at 150 s of recovery (95.7 ± 11.8% in males, 91.1 ± 14.2% in females). Reduction in Q pot , however, was greater in males (51.9 ± 16.3% vs 60.6 ± 15.5%) and was significantly correlated with J′ext ( r  2  = 0.90,  p  &lt; 0.001). Although there were no differences in the magnitude of J′ext, differences in MVC and Q pot  are evidence of sex‐specific responses and highlight the importance of appropriately characterizing exercise intensity regarding exercise domains when comparing physiological responses in males and females.   Highlights    We have previously shown evidence that extreme‐intensity dynamic exercise is described by W′ext in males and smaller than W′sev. We currently tested for potential sex differences in J′ext (isometric analogue to W′) and neuromuscular responses (i.e. maximal voluntary contraction, MVC; potentiated twitch force, Q pot ) during extreme‐intensity exercise.    J′ext and extreme‐intensity exercise tolerance was not different between males and females. The reduction in MVC was not different across extreme‐intensity exercise across males and females, whereas the reduction in Q pot  was greater in males following all extreme‐intensity exercises, although not after exercise at 90%MVC.    Together, although extreme‐intensity exercise tolerance is not different, these data highlight differences in the contributing mechanisms of fatigue during severe‐ and extreme‐intensity exercise between males and females.

Sex differences in the intensity–duration relationships of the severe‐ and extreme‐intensity exercise domains