Many athletes use beta2-agonists as treatment of airway hyperresponsiveness during exercise. High dose beta2-agonists may have an ergogenic effect on exercise performance. We hypotheis that the beta2-agonist, salbutamol, taken in high doses can improve muscle power and recovery during exercise in well-trained athletes.

Inclusion Criteria:

• Males
• age 18-45
• training frequency > 10 hrs/wk
• informed consent

Exclusion Criteria:

• smoker or former smoker
• chronic diseases, as well as asthma
• allergy to the study drugs
• intake of any form of medicin or inhibited drugs during the study
• use of beta2-agonist 14 days before the intervention