After fitness is best not to eat to achieve the purpose of fat loss, if it is evening fitness can eat something before working out, and then go to the gym. After fitness if you feel really hungry, you can eat tomatoes or fresh vegetables, fruits, can not eat, you can eat more before fitness. If you want to gain muscle, you can eat high-protein foods after working out, such as beef and protein powder. If you want to lose fat, fitness must also be adhered to, three days of fishing and two days of sunbathing is not to play a weight loss effect. The amount of daily exercise needs to reach at least 30-50 minutes of high-intensity exercise to achieve the purpose of burning fat.