The twin calf muscle or also calf twin muscle called, shows an approximately 25 cm long, 10 cm wide and 2 cm thick structure. It is particularly stressed during running and jumping movements. In the calf musculature there are mainly FT-fibers, which are responsible for fast and powerful movements.
The length of the heel bone, among other things, is decisive for muscular performance. The longer it is, the more favorable the leverage and athletic jumping and running disciplines are thus favored. Antagonist of this calf muscle is the front shin muscle, which causes the tip of the foot to be lifted.
Approach, Origin, Innervation
Approach: via the Achilles tendon at the calcaneus tuber calcanei Origin: above the femoral epicondylus (Epicondylus lateralis et medialis femoris) Innervation: N. tibialis, S1-2The twin calf muscle is particularly stressed during jumping movements. Therefore, this muscle is very well defined and recognizable, especially in basketball players. In targeted strength training, it is trained by squats and leg presses among other muscles.
A specific exercise for training this muscle is the calf lifter. In order to stretch the twin calf muscle in a targeted manner, the athlete stands in a stepping position. The hands press against a resistance with a slight upper body extension. The rear, stretched leg is stretched with the tip of the foot pointing forward and the heel completely resting on the floor.
