Leg lifts and sprints. This can train the speed and strength of kicking. You can also practice leg control after long-term training.
Empty fists and vigorous kicking are easy to hurt your muscles, and are generally used when looking for feelings and correcting actions. Only seven components are enough. If there is no goal, you can do a set of physical fitness, such as doing 20 push-ups, shaking your arms to relax, and then punching straight for 40 times. Then do 20 squats, 10 cross kick, rest and repeat the previous actions.
Be sure to warm up and pull the ligament before doing the action, otherwise, the action is not in place, and the other is easy to damage your muscles. The best way to enhance physical fitness is long-distance running, and then carry out intensive exercise in special parts according to your own needs. If you really want to practice boxing legs, you must always target and fight if possible. This is the most effective way to improve, and all fighting techniques should return to actual combat.