Is Stretching or Warming Up Better before a Workout?

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Playing Is Stretching or Warming Up Better before a Workout?

Celebrity fitness trainer Jennifer Jacobs helps The Doctors separate fitness fact from fiction. Could having sex the night before your workout hurt your performance? Should you stretch or warm-up before your workout? Do you really need a recovery day? Does more sweat equate to a better workout? Founder of the J Method Jennifer Jacobs weighs in.

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