Can one hard interval workout a week help you lose body fat?

One weekly 75-minute interval workout led to about as much fat loss as three weekly sessions over 16 weeks. Popular Science reported on a Hong Kong study of 315 adults. They were overweight or carried extra fat around their waist. Researchers compared two schedules for High-Intensity Interval Training (HIIT), which pairs hard bursts with brief rests. One group did a single 75-minute session each week. Another spread the same weekly exercise across three sessions. A third group served as the comparison. The once-weekly group lost about 1.75 pounds more body fat than the comparison group. The three-session group lost about 2.2 pounds more. Both exercise groups also had clear improvements in waist size. Neither group reported exercise-related injuries. Keith Diaz, an exercise expert quoted in the article, described the fat losses as modest. The key detail is equal weekly exercise, not less exercise. This was not a test of one short workout against three full-length ones. The findings suggest some freedom in scheduling exercise for fat loss. They do not show that both schedules match for every health goal. The researchers also tracked how well people used oxygen during exercise. But the supplied report does not give those results. For BioSocial members, weekly minutes add useful context to progress logs. Session count alone leaves out part of the story. Tracking waist size or Body Fat Percentage over time could help members compare notes. Those personal trends are not proof that a schedule caused a change. Still, sharing both the routine and the numbers makes community comparisons more useful. What changes have you noticed in your measurements with one weekly workout versus several?