Safe bollard for jumping 75-60-50 (plyobox)

It's no secret that to develop endurance and strength you need jumps. In functional training and cardio training for these purposes are actively used special bollards with edges of different lengths. These are multifunctional projectiles - different heights allow you to choose the difficulty for any level of fitness of the athlete. For warm-up, start with the minimum height - 50 cm. Can you do more? Go to 60 and then 75 cm. One of these universal benches replaces three at once, which saves a lot of space. The equipment is ideal for individual training and for gym sessions.