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Related Experiment Video

Updated: Dec 2, 2025

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
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High-Intensity Interval Training Improves Cognitive Flexibility in Older Adults.

Said Mekari1, Heather F Neyedli2, Sarah Fraser3

  • 1School of Kinesiology, Acadia University, 550. Main Street, Wolfville, NS B4P 2R6, Canada.

Brain Sciences
|November 3, 2020
PubMed
Summary
This summary is machine-generated.

High-intensity interval training (HIIT) significantly improved cognitive flexibility in older adults compared to moderate-intensity continuous training (MICT) and resistance training (RT). Exercise programs should consider HIIT to combat age-related cognitive decline.

Keywords:
agingbrain healthcardiorespiratory fitnesscognitionexercise intensity

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Area of Science:

  • Gerontology
  • Exercise Physiology
  • Cognitive Neuroscience

Background:

  • Aerobic exercise is linked to improved executive function in older adults.
  • The comparative effects of high-intensity interval training (HIIT), moderate-intensity continuous training (MICT), and resistance training (RT) on executive function remain unclear.
  • This study investigated the differential impact of these exercise modalities on cognitive function in seniors.

Purpose of the Study:

  • To determine if HIIT enhances executive function more effectively than MICT or RT in older adults.
  • To compare the effects of six weeks of HIIT, MICT, and RT on cardiorespiratory fitness and cognitive flexibility.
  • To provide evidence-based recommendations for exercise interventions aimed at preserving cognitive health in aging populations.

Main Methods:

  • Sixty-nine older adults (mean age 68 years) were randomized into HIIT, MICT, or RT groups for six weeks.
  • Interventions included HIIT (2x20 min bouts, 15s high intensity), MICT (34 min at 60% peak power), or RT (8 exercises, 2x10 reps).
  • Cardiorespiratory fitness (V̇O2max) and executive function (Stroop Task) were assessed pre- and post-intervention.

Main Results:

  • All groups showed improvements in V̇O2max, with HIIT and MICT demonstrating greater gains than RT.
  • No significant group-by-time interaction was found for the overall Stroop Task naming condition.
  • Only the HIIT group exhibited significant improvements in cognitive flexibility, indicated by faster reaction times in the switching task (1250ms to 1100ms).

Conclusions:

  • Despite comparable improvements in cardiorespiratory fitness, HIIT uniquely enhanced cognitive flexibility in older adults.
  • MICT and RT did not yield significant improvements in cognitive flexibility.
  • HIIT protocols may be a valuable strategy for mitigating age-related cognitive decline and enhancing executive function in older adults.