The POWERbreathe Classic is the original breathing device. It works by controlling the amount of air that you breathe in. Just like any resistance training your body responds by an increase in strength, power and endurance. In this case in the Inspiratory muscles.
The Classic is available in three models
 

• Wellness (light resistance) - Ideal for people who, because of illness or advancing age, are restricted by shortness of breath.
• Fitness (medium resistance)- For people who are moderately fit and lead an active lifestyle, whether professionally or socially.
• Sports (heavy resistance)- Elite athletes and people that are in top physical condition who lead a very physically demanding lifestyle, whether professionally or socially.

All Classic models are drug free with no side effects and feature

• Fully washable design
• Calibrated Inspiratory load
• Adjustable training resistance (9 levels and in this case of medium resistance)
• Resistance level indicator

Directions - Just breathe into the device twice a day for 30 breaths. As it becomes easier progressively increase the resistance level.