O2 Trainer By Bas Rutten
The Inspiratory Muscle Trainer Is Here!
New and improved set comes with 16 different screens. Adjust as you strengthen your breathing. Used for both Breathing exercises and Workout exercises.
Regulates air intake and improves muscle oxygen efficiency during exercise
Strengthens your lungs and breathing muscles in your upper abs by resisting air intake while breathing in
Amazing results with 30 reps (under 4 minutes) a day and proven stronger abs in 6 weeks