May 01, 2005
There is a small, yet significant possibility of catastrophic trauma from intense training, Eugene Allen writes in “Killer Workouts.” Rhabdomyolysis (Rhabdo) is a potentially fatal condition, marked by high concentrations of potassium in the blood.
Rhabdomyolysis is the breakdown of muscle cell contents, and their consequent release into the bloodstream. Muscle stress is exacerbated, and breakdown accelerates when Eccentric contractions occur simultaneously with stretching (think kipping pull up). Extra potassium is released into the blood from this process and may reach levels that can alter heart function. In extreme cases, the heart may fail completely.
Intense exercise after a recent infection raises the chance of muscle deterioration during exertion, as well as exercising when it is very hot and humid. Other rhabdo invitations are heavy alcohol consumption, cocaine usage, and the use of a cholesterol-lowering drug called Mevacor (lovastatin is the generic name).
The primary diagnostic indicator of rhabdo is elevation of serum creatine phosphokinase (CPK). Rhabdo can raise CPK levels to five times the norm. This is an advanced indicator. Post WOD warning signs may be harder to come by. Extreme weakness or fluid build up may be cause for concern. However, if you’re pissing what resembles Coca-Cola, find an emergency room STAT.
The risk of rhabdomyolysis can be reduced by vigilance and common sense. The warning label for CrossFit is a strict adherence to our charter: mechanics first, consistency with those mechanics and then intensity. Highly fit athletes are not immune to rhabdo, however increased work capacity is an excellent prophylactic measure.