You weren’t misled: improving blood flow and raising your body temperature is key before a workout. ‘Muscle becomes more pliable, like elastic, when it gets warmer,’ Vincent says. This enhances ...

1. Stand in a doorway. Cross one leg over the other leg. 2. Reach toward the side with the leg that’s in front. 3. Push onto the doorway. Hold for between 10 and 30 seconds. Then, switch legs to ...