Stretch your legs by following a few flexibility exercises. This helps your ankle and hamstring region and allows extra movement to raise your legs as high as you can effectively. Stretches such as the active hamstring assists in increasing the strength and height of your kicks. You can start by lying down on your back and stretch one leg out. After that, maintain the back of your thigh for force and bend the lifted knee a little. Begin straightening your knee until the thigh is fully raised. Maintain the lower back on the ground and hold the raised leg with both hands as you move them close to your nose. Maintain this stance for around 15 seconds and repeat with the other leg.
It is important to do ankle stretches as well. You should point, rotate and flex the ankle when your leg is raised. Increase the difficulty by rotating the leg in a clockwise direction to open the hip joint. Your core strength needs to be increased for higher kicks. If you are fully fit and have a stable body, then you can easily jump kick higher. Sit-ups, push-ups, lunges, squats and weight training help improve your core strength. Devise a workout plan for the primary muscles and follow this in the off season as well. This will help reduce the chances of injury and will assist you in a high kicking sport like soccer, taekwondo and dancing.
If you want to achieve your targets then you must practice like a madman. Every day practice kicking as high as you possibly can. Know that a high kick for every sport is different and requires an alteration in your techniques.