As for what to eat after fitness, mainly related to the purposefulness of fitness.
Weight loss, fitness before 1-2 hours to eat the best, fitness will be able to consume its calories, to prevent more calories accumulate in the body to form fat.
For muscle building, eat before and after working out. Eating 1-2 hours before a workout provides energy for the next workout, helping you to complete large weights more efficiently. 1 hour after the fitness must also be again to replenish energy, because the fitness process consumes a lot of energy, timely nutrition after the workout, for the fitness effect has a relatively large enhancement, to promote muscle growth.