Identification of New Serum Markers for Detection of Abuse With Erythropoietin

rHuEpo (5000 IU)is administered using a small syringe under the skin every other day for the first 2 weeks, on 3 consecutive days during week 3, and once a week from week 4-10.

For ten weeks participants will receive supervised endurance training on a bike three times a week. Physical effect will be examined with VO2-max tests before during and after the training period.

placebo (saline) is administered using a small syringe under the skin every other day for the first 2 weeks, on 3 consecutive days during week 3, and once a week from week 4-12.