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Running Men
4125 Market St #10
Ventura, CA 93003
(800) 235-3333
"Threshold" Inspiratory Muscle Trainer (IMT)

Threshold IMT provides consistent and specific pressure for inspiratory muscle strength and endurance training, regardless of how quickly or slowly patients breathe. This device incorporates a flow-independent one-way valve to ensure consistent resistance and features an adjustable specific pressure setting (in cm H20) to be set by a healthcare professional. When patients inhale through Threshold IMT, a spring-loaded valve provides a resistance that exercises respiratory muscles through conditioning.¹

  • The first inspiratory muscle trainer that ensures constant inspiratory pressure load - independent of air flow or breathing rate
  • Breathing resistance adjustable from approx. 7 to 41 cmH2O
  • Ensures consistent training effort
  • Maximizes training effort
  • Proven to increase muscle strength, endurance and exercise tolerance in selected patients with COPD
Single Patient Use

Reference: Larson JL, et al. Inspiratory muscle training with a pressure threshold breathing device in patients with chronic obstructive pulmonary disease (abstract). Am Rev Resp Dis 1986;133:A100.

Click on "Replacement Mouthpieces" see number 1018-22, looks different, but works fine.

Last Updated: 8 Mar 2022

Qty Product Catalog Number Price

Threshold Inspiratory Muscle Trainer 730 27.45
  Buy 5 or more for $25.45 each