![](http://www.alamy.com/thumbs/6/76235B2E-340E-49AF-B5F8-1BECB86E9571/2GN0JWT.jpg)
A man having difficulty in straightening or bending the knee because of patellofemoral pain syndrome
Size: 5824px × 3872px
Photo credit: © Marina Andriichuk / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: arthritis, athlete, collision, fitness, fracture, hand, hurt, impact, injured, injury, jogger, jogging, joint, knee, leg, ligament, male, man, massage, meniscus, nature, overuse, pain, patellar, patellofemoral, person, pfps, runner, runners, running, soccer, soreness, spain, sport, sprain, spring, strain, tendinitis, tendon, tendonitis, torn, training, treatment