‌The 31 year old tore his quadriceps tendon, which collaborates with the quadriceps muscle to straighten the leg, at a gym in Teresina in north-eastern Brazilian state Piaui while sculpting his physique for a bodybuilding competition scheduled for May. Video of the incident captured him clutching his right knee and shrieking in pain as his head tilted backwards and he sat powerless in the leg press apparatus. View 3 Images Ranieri Lopes Filho, 31 (Image: @ranierilf/Instagram)Article continues belowGregory Ferraz told Ranieri in a message: "Get better soon. The quadriceps tendon is the most important tendon involved in straightening the knee from a bent position. It connects the quadriceps muscle to the top of the kneecap.