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Samples in periodicals archive:
PowerLung and the Effects of a Respiratory Muscle Training Program on Respiratory Peak Flow (PEF), Forced Expiratory Volume 1 (FEV1) and SPO2 over an 8 week period
Elevation Training Mask and the Effects on Respiratory Peak Flow (PEF), SPO2, Red Blood Cell Chemistry, Pulse and Endurance performance levels over a 6 week period...