Design: For this prospective, triple-blinded, randomized clinical trial, people after stroke will be randomly allocated into either experimental or control/sham groups. The experimental group will undertake training of the inspiratory muscles with the PowerBreath Medic Plus regulated at 50% of the subjects' maximal inspiratory pressure (MIP) values, five times/week over six weeks during 30 minutes/day. The control group will undertake the same protocol, but the participants will receive the threshold devices with minimal resistance valves. At baseline and post intervention after the cessation of the interventions, researchers blinded to group allocations will collect all outcome measures. After 12 weeks will collect again maximal inspiratory pressures and functional gait performance.