@theobaldaledk
Fragmented 15-minute workouts suit busy professionals well with quick results, but often rebound due to insufficient stimulus for long-term adaptation. To achieve sustainable effects, courses should adopt progressive overload design (gradually increase intensity/volume) and pair with systematic nutrition guidance (calorie cycling + macro balance). Compared with traditional 90-minute systematic training, the main differences lie in: lower total volume, slower muscle & strength gains, higher reliance on consistency & diet, but much better adherence for time-poor people.
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