Patellar Tendinopathy

Patellar tendon tendinopathy (PT), also known as jumper’s knee, is frequently observed in sports involving running and jumping (Figueroa et al., 2016). This injury is caused by overload due to repetition of the Stretch-Shortening Cycle (SSC). Stresses will be greater in the deceleration stages of the movement (takeoff, landing, etc.) (van Ark et al., 2016). The specific definition of an overload injury is based on the concept of an injury occurring in the absence of a single and identifiable traumatic cause (Chéron et al., 2017). In most cases, sports-related tendinopathies have well-defined histopathological lesions that stem from overstress, insufficient recovery but also other processes such as aging, adaptation to stress, genetics, etc. (Khan et al., 1998; Maffulli et al., 1998; Magra et al., 2005; Sharma et al., 2009). PT is most often characterized by the progressive onset of pain at the lower pole of the patella (Rudavsky et al., 2014). It can have a severe impact on recreational and daily activities as well as sports performances (De Vries et al., 2017).