More jumping power and flexibility - with springiness training. Springiness training belongs to Functional Training. The springiness training is very popular among sprinters and basketball players and other. Jumping power and acceleration are mainly improved with fitness equipment of this category. Springiness training for the torso is also often used for boxing and MMA. We offer the best and safe plyo boxes for this type of training from Escape, Xenios, Element Fitness and other brands.