Threshold® -- Inspiratory Muscle Trainer (Model 64485)

Increase Your Aerobic Capacity !  Calibrated, Spring-Loaded Valve   Adjustable pressure, 7 - 41 cm H2O   Maximizes Training Effect   Ensures Consistent Training Effort   Boost your performance! Increase your endurance! ...And do it without leaving the comfort of your easy chair! Just inhale through the Threshold® Inspiratory Muscle Trainer... Studies show that training at 30% of maximal inspiratory pressure for two months will increase max. inspiratory pressure, improve endurance time, and increase the distance walked in 12 minute trials. The Threshold® Inspiratory Muscle Trainer (IMT) provides a constant and specific training workload, regardless of how fast or slowly you breathe. The adjustable (and calibrated) spring-loaded valve blocks air flow until you can produce enough inspiratory pressure to overcome the spring force. Inspiration muscles work harder and get stronger over time. The IMT is easy to use. With the mouthpiece removed, twist the control knob so the indicato