thank you and pleased to answer you The Triceps sural and its 3 muscular chiefs: The Soleus in depth and the internal and external gastrocnemius, is the muscle which anatomically gives its curve to the calf and physiologically intervenes both in the maintenance of the standing position and the propulsion of the lower limbs. Extremely solicited in sports: racing, impulse, starting, changes of direction, jumps, it can be partially or totally disintegrated by detachment of its muscular fibers between its back part the Soleus and forward and inwardly its superficial part; The separation will be filled by a hematoma. Frequent in the tennis player of the quarantine, this disintegration lesion whose severity is proportional to the importance of the aponeurotic tear and the hematoma that will fill the gap left by the detachment, received the name of Tennis-Leg (leg of the tennis player). It is also found in football, squash, badminton and running. The pain is immediately violent or even syncopal accompanied by a total functional impotence The trauma can sometimes go unnoticed and the pain will wake up during a sports exercise. Treatment focuses on Resting - Frosting - relative rest with crutches - elevation of the injured limb with decreased position in the bed - compression by a compression band of grade 2 from the toes to the calf to wear a good ten days - Physiotherapy must precede the sporting recovery. Recovery of sport, especially running and team sports, will depend on the size of the hematoma and ranges from 3 to 4 weeks to several months if the hematoma persists. Lastly for sport running, never run in tar road after having TENNIS-LEG recovery. I hope i was helpfull for you. best wishes