Effect of intravenous aminophylline upon the incremental exercise performance of healthy men

Aminophylline increases the contractile force of fatiguing muscles. The effects of aminophylline upon maximal exercise performance are not defined. 6 healthy men performed incremental bicycle ergometry before and after receiving intravenous aminophylline (6 mg/kg). Maximal oxygen uptake, maximum work rate, and maximum minute ventilation were unchanged following aminophylline. Heart rate measured at rest and at 50-watt increments of work rate was significantly increased following aminophylline (p less than 0.03). The heart rate response to incremental exercise (delta HR/delta VO2) was unchanged by aminophylline. We conclude that aminophylline does not increase maximal exercise performance of healthy men.