Overview
- Researchers at the University of Hong Kong ran a randomized trial of 315 adults with central obesity between September 2021 and September 2024 and published the results in Nature Communications this week.
- At the 16‑week assessment both the once‑weekly and three‑times‑weekly groups, each completing 75 minutes of interval walking per week, achieved similar reductions in total body fat mass, body fat percentage, and waist circumference and improved cardiorespiratory fitness compared with a control group.
- By the 32‑week follow up waistline reductions largely persisted but most of the fat‑loss and weight‑loss advantages had faded, showing limited longer‑term maintenance after the intervention ended.
- The trial used dual‑energy X‑ray absorptiometry (DXA) for precise body composition measurement and found no significant changes in blood pressure or cholesterol, which authors say may reflect normal baseline levels in participants.
- The finding implies that total weekly exercise volume may matter more than session frequency and offers a practical, time‑efficient option for time‑pressed adults, though generalizability is limited because the study tested 315 Chinese adults in Hong Kong and longer‑term cardiometabolic effects are uncertain.