Summary
The article highlights three key facts about exercise: interval training should be personalized, individuals without medical issues can begin light-to-moderate exercise with a doctor’s approval, and regular physical activity can reduce heart disease risk by a third, regardless of age. The author recounts waking up early in Shanghai and, unable to sleep, decided to go to the hotel gym, reflecting on his past fitness. Despite feeling fit, he realized he was unprepared for the workout, arriving inappropriately dressed while others were in proper gym attire.
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