During pre season training and early in the competition season weight training tends to play a major role in the sport. It is customary for a high jumper to weight train up to 4 times a week, focusing mainly on quick movements involving the legs and trunk. Some athletes perform Olympic lifts in training. Athletes use low repetition and emphasize speed to maximize the strength increase while minimizing adding additional weight to their frame. Important lifts for a high jumper include the back squat, front squat, power cleans and hang cleans. The emphasis on these lifts should be on speed and explosive as those are crucial in the high jump take off phase.