Could pain on the outside of the knee while running be iliotibial band syndrome?

Yes. Iliotibial band syndrome typically causes localised lateral-knee pain during running and may be more noticeable downhill, after a sudden mileage increase, or with repeated knee bending. Management includes temporarily reducing running load, improving hip strength, and adjusting training and running mechanics.

What causes lower-leg tightness during running that improves after stopping?

Pain and tightness that repeatedly begin at a similar running distance or time and gradually ease after stopping may indicate chronic exertional compartment syndrome. Numbness or weakness can also occur. Assessment should exclude a stress fracture, vascular disorder, and nerve entrapment.

Why should rehabilitation after sports medicine surgery not follow time alone?

A timeline gives only a rough stage. Progress is determined by pain, swelling, range of motion, strength, movement control, tissue healing, and what was done during surgery. Moving too quickly may increase failure risk; moving too slowly may lead to stiffness and loss of function.