![](http://www.alamy.com/thumbs/6/5718E1FA-3F00-460F-8318-1DEE66AC8237/2GN0K0T.jpg)
A man having difficulty in straightening or bending the knee because of patellofemoral pain syndrome
Size: 6016px × 4016px
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