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Training Mask will make your workout so efficient, you can actually cut the amount of time spent in training by as much as two-thirds. Simply strap it on and begin your normal work out. Within days, you'll see the difference! By conditioning your lungs and creating pulmonary resistance, your diaphragm is strengthened, thereby making your lungs work harder. When lungs work harder, the surface area and elasticity in the alveoli is increased, thus increasing your stamina and ability to go harder at your sport -- or simply have increased energy for daily living. Benefits: Conditions the lungs by creating pulmonary resistance. Strengthens the diaphragm. Increases surface area and elasticity in alveoli. Increases lung capacity. Increase anaerobic thresholds.
Sizing based on bodyweight:
SMALL - 4 inches (10.2 cm) - 100lbs to 145
MEDIUM - 4.5 inches (11.4 cm) - 150 to 249
LARGE - 5 inches (12.7 cm) - 250lbs+