PMID 41162584

Research
All papers

Effort intensification and restoration in short-term HIIT predict strategic control in complex tasks

Zhao Y, Qin C, Zhang Y, Shi Y, Wang F

Question

How do short-term HIIT exercise duration and interval duration patterns relate to inhibitory function and weighted reaction time in college students?

Summary

In college sports students, four acute 24-minute treadmill HIIT formats with different work and recovery durations were associated with immediate changes in Flanker-task reaction-time measures and inhibitory-function metrics. The paper suggests interval pattern and exercise intensity influenced cognitive responses, but the study used short-term surrogate cognitive outcomes and complex modeling rather than practical fitness outcomes.

Methodology

  • Moderately active college sports students
  • 85 participants.
  • Treadmill.
  • Work intervals: 30 s or 60 s at at least 85% HRmax.
  • Recovery: 30 s, 60 s, or 120 s slow walking.
  • Intensity: At least 85% HRmax.
  • 24 min interval block.
  • Single session.
  • Randomized four-group acute exercise experiment
  • Inhibitory function, Weighted reaction time, and Exercise intensity were tracked.

Outcomes

WRT base

Weighted reaction time in baseline-condition comparisons declined after exercise.

Largest decline was 14.8% in HIIT3 males and 13.9% in HIIT2 females, both p<0.001.

Improved

WRT no

Incongruent-task WRT was the strongest modeled factor for IF_delta.

Variance decomposition: WRT_no 49.96% pretest and 82% posttest.

Mixed

HIIT type

Interval pattern influenced cognitive-response magnitude, with gender differences.

HR differed by HIIT type p<0.001; IF_delta group p values in Table 1 were not significant.

Mixed

Cognition

Authors concluded all four HIIT types improved cognitive function immediately after exercise.

Narrative conclusion; effects varied by task and model.

Improved

Insights

  • Use cognitive claims carefully: this is immediate Flanker-task performance, not durable executive function.
  • Short work and recovery choices may change acute mental responses.

Limitations

  • Acute only
  • Surrogate cognitive outcomes
  • No long-term training arm
  • Reasons for dropout not described
  • Moderately active student sample

Safety

  • No adverse events reported in the paper.
  • Seven of 92 initial participants did not complete the whole test; reasons not reported.