Study Finds You May Need Only One Workout a Week to Lose Belly Fat!

Keypoints:

• • A randomized trial followed 315 adults with central obesity over four months
  • One group did 75 minutes of interval walking in a single weekly session
  • Another group split the same 75 minutes across three sessions a week
  • Both groups saw nearly identical improvements in body fat and fitness
  • The findings were published in Nature Communications

Skipping the gym twice a week might not cost you as much as most fitness guides claim. Researchers at the University of Hong Kong just put that assumption to a real test, and the results landed in one of the field's top journals.

The trial ran from September 2021 to September 2024 and recruited 315 adults, all dealing with central obesity, the kind of stubborn belly fat tied closely to heart disease and metabolic issues. Participants were split into three groups. One did brisk interval walking once a week for 75 minutes straight, another spread that same 75 minutes across three separate weekly sessions, and a control group simply attended health education classes every two weeks.

After four months, both exercise groups showed strikingly similar results. 

Body fat percentage dropped, waistlines shrank, and cardiovascular fitness improved by comparable amounts in both the once-weekly and three-times-weekly groups. Professor Parco Siu, who led the research at HKUMed's School of Public Health, said the real value here is practical. For anyone juggling work, family, and a packed schedule, consolidating a week's worth of exercise into one focused session turns out to be a genuinely realistic alternative, not a lesser one.

The catch is intensity. This isn't a leisurely stroll once a week, it's 75 minutes of interval walking, alternating bursts of brisk effort with easier recovery periods. The workout has to be demanding enough to count, even if it only happens once.