Fitness is an important determinant for health and influenced by using large muscles. Muscles respond to training. We want to know if adding arm exercise to leg exercise can provide a better training session for healthy individuals. If the strategy shows promise for healthy people then it might work for people with lung disease who have trouble training because of difficulty breathing. The purpose of this first study is to evaluate, in healthy people, a unique approach to training by determining if adding arm exercise to leg exercise can be endured longer than leg exercise alone.

Inclusion Criteria:

• healthy individuals

Exclusion Criteria:

• orthopedic or neurological condition that might affect the performance of the treadmill, arm or leg cycling
• have a symptomatic cardiac disease or undergone a recent surgical procedure that might affect the performance on an exercise test
• presence of any chronic respiratory condition