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Beware of Willpower Drains
Sedentary tasks like making decisions or focusing on listening to a speaker can drain the same willpower reserves that exercise taps, Baumeister reports. This is why forcing yourself to go for a jog will likely be more difficult after sitting through a boring presentation, even if you aren't physically tired. Try to schedule workouts for times when your willpower hasn't already been tested.
As a reminder, always consult your doctor for medical advice and treatment before starting any program.