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A randomized study conducted over four months has revealed that condensing a full week’s worth of interval walking into a single session can be as effective as distributing it over three days. Researchers from the University of Hong Kong assigned 315 overweight individuals with central obesity to undergo interval training once a week, three times a week, or to be part of a control group. Each exercise group engaged in 75 minutes of activity weekly. After 16 weeks, both groups demonstrated reductions in overall body fat mass, body fat percentage, and waist size, alongside improvements in cardiorespiratory fitness. The researchers suggest that this once-a-week approach presents a viable alternative for those with limited time availability.

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00:0075 minutes. One session. That may be all it takes. Researchers at the University of Hong Kong
00:06ran a randomized trial with 315 overweight adults, all carrying excess fat around the waist.
00:14The trial ran for three years, from September 2021 to September 2024. One group did brisk
00:21interval walking once a week. Another split the same 75 minutes across three sessions.
00:26A third group just attended health education classes. After 16 weeks, both exercise groups
00:33had reduced total body fat mass, body fat percentage, and waist circumference. Both also
00:39improved cardiorespiratory fitness compared with the control group. Body fat was measured with
00:44dual-energy X-ray absorptiometry, so this was not a scale-and-mirror study. Professor Parko-Sue
00:50says once-weekly interval training offers similar benefits and represents a practical exercise
00:56strategy. For anyone juggling work, study, and family, that changes what a realistic exercise
01:02plan can look like. Disclosure. This video contains stock footage and content created or enhanced
01:07using AI-assisted tools.
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