The 20-minute routine that works for beginners and athletes: how all levels reset metabolism
Your fitness tracker buzzes at 6:30 AM, offering brutal hour-long HIIT for athletes or gentle 10-minute stretching for beginners. You close the app, feeling neither elite nor sedentary. This false binary traps millions who quit within weeks, yet certified personal trainers studying metabolic conditioning discovered a revolutionary truth. A single 20-minute protocol scales across all … Lire plus









