Before exercise, you eat food to provide energy. It will fill your "fuel tank", boost your brain energy and focus on exercise.

At this time, you should eat high-calorie food and have an energy bar. This is a snack made of grain. It tastes like an omelet, which can bring you enough energy and make you feel neither too full nor too hungry.

2. The first 20 minutes

If you only have 20 minutes before exercise, then the liquid or food with high G 1 value is the most suitable. These fast-acting carbohydrates will help reduce abdominal discomfort or breathing during exercise, while providing instant burst of energy.

At this time, you should eat high-vitamin food, open a bottle of vitamin drink or eat a honey or jam sandwich made of white bread. This food digests quickly.

3. The first 5 minutes

Snacking before exercise is never necessary, but it can provide instant energy supplement if you are short of energy or have to rush to the gym after a long meeting.

At this time, you need a small amount of carbohydrates with a high G 1, such as eating a handful of raisins, almonds or dates.

Extended data:

Before running, you can generally do the following warm-up activities:

(1) Stand with your hands akimbo and move your ankles alternately;

(2) Squat down and move your knees with your hands;

(3) Lift the legs alternately to move the hip joint;

(4) Turn the waist with your hands akimbo and move the waist;

(5) One-handed support, kicking back and forth in turn to move the hips and knees;

(6) lunge and lunge leg press; Left and right leg compression, involving leg ligaments;

(7) The upper body bends back and forth, and the upper limbs move slightly.