Dr. Jon Hyman

Jon Hyman, MD

Muscle

  • Tears in the hamstrings, biceps, lats, calf muscles
  • Strains of the any muscle tendon unit
  • Rhabdomyolysis

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.

In short, good flexibility, starting muscle length and warmth seem to be important in efficient contracture of the muscle tendon contractile unit. Hamstrings are vulnerable during running, sprinting, cartwheels, inverted burpees, and deadlifts just to name a few. All muscles are at risk but due to the high concetration of blood vessels in muscle and their oxygen levels, most muscle injuries will recover with time.

Rhabdomyolysis is a rare, but dangerous condition of muscle breakdown and the harmful effects the breakdown products can have on the body, in particular, on the kidneys. Many people will experience muscle swelling, stiffness, even beyond feeling ‘pumped’ and may even be pre-rhabdo. Rest and proper hydration often takes care of that. If you have not worked out for a while or do a particularly intense and long workout, involving multiple reps of load-to-failure lifting, you might be at risk for ‘rhabdo.’ Prevention is safer than treatment so all I can say is educate yourself about rhabdo, and then make sure you avoid it.

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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

Elbow

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.

Hips

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

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

Muscle

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.

Shoulder

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.

Spine

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

Wrist

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
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