Dr. Jon Hyman

Jon Hyman, MD


  • Patellofemoral pain
  • Meniscus Tears
  • Chondromalacia
  • Contusions

Knees are more than just the platform that supports our stance, run and squat.

They facilitate deep flexion, torsion, rotation, pivoting and translation. Cartilage is the most vulnerable in CrossFit and the sports of fitness. While artificial turf, cleats or grass fields may make ligaments vulnerable in rugby, football and soccer, in CrossFit, it’s the weighted flexion of squats, lunges, pistols, thrusters etc which put knee cartilage and the medial mensicus or lateral meniscus at risk.

There are two types of cartilage in the knee: articular cartilage and meniscal cartilages. Chondromalacia, or softening of the cartilage, may be a function of pre-existing degeneration or of improper load applied. Striking the knee against the ground during lunges or letting the knee get ahead of the toes in a lunge or squat can overload the cartilage pressures, leading to softening and pain.

Meniscus tears are common if the meniscus is pinched in a bent knee or a straight knee when a heavy load is applied with a twist.

The knee issues of greatest significance involve cartilage and ligament.  Our knee cartilage is composed primarily of two types: articular cartilage that we slide on, like soap, and meniscus cartilages, i.e. cushions or shock absorbers as they are called.   These structures are at risk with every movement, and there’s really no clear way to prevent chondromalacia (softening of the cartilage) or meniscus tears - other than by using good form/technique and avoiding extreme positions of deep and prolonged knee flexion with heavy weight.  If you feel sharp pain in the knee, heed the warning and back off.  Keeping the knee straight for a while can allow healing.  Deep squats can irritate the meniscus tissue, especially if it’s already inflamed.  Suspected cartilage injury should be evaluated by a specialist.  Nutritional Supplements haven’t been definitively proven to aid in healing cartilage.

comments powered by Disqus

Our thanks to FlexBuilding: A New Way to Move. A New Way to Live. for providing the anatomical images for this website.

Your Body & Injury


The biceps tendon can tear up by the shoulder (rupture of the long head of the biceps) or tear by the elbow.

Foot and Ankle

Achilles Injuries. Most commonly, CrossFitters will sustain overuse tendinits.


CrossFit and Plyometrics involves a fair amount of squatting and crouching. Wallballs, slam balls, olympic power lifts, eg squat cleans etc, all involve ‘dropping down low’ and getting your hip crease below knee crease.


Knees are more than just the platform that supports our stance, run and squat.


Muscle physiology is a complex science. There are fast twitch, slow twitch muscle fibers and elaborate mechanisms of enhancing strength, power, endurance speed and fatigue resistance of muscle.


There are two labra or labrums in the body. They are both at somewhat high risk in the Sports of Fitness activities which involve a lot of deep squatting and overhead lifting.


The spine is a complex anatomic masterpiece of axial structural support for our body.


Sprains and tendonitis are the most common ailments.

American Academy for Orthopaedic Surgeons American Board of Orthopaedic Surgery American Orthopaedic Society of Sports Medicine International Society for Hip Arthroscopy
atlanta falcons atlanta hawks atlanta thrashers