Um dos livros mais marcantes que li nos últimos tempos:
When all is said and done, exercise - despite its manifold benefits - requires overriding deep, natural instincts. So instead of shaming and blaming people who avoid exertion, we should help each other choose to exercise.
Make exercise necessary and fun. Do mostly cardio, but also some weights. Some is better than none. Keep it up as you age.
(from the last two pages of this amazing book)