Date on Master's Thesis/Doctoral Dissertation


Document Type

Master's Thesis

Degree Name



Health and Sport Sciences

Degree Program

Exercise Physiology, MS

Committee Chair

Zavorsky, Gerald S.

Committee Co-Chair (if applicable)

Symons, Brock

Committee Member

Harms, Craig A.

Committee Member

Folz, Rodney


Swimmers--Training of; Breathing exercises; Muscles--Physiology; Fatigue


Controlled frequency breathing (CFB) is a common swim training modality that involves holding one’s breath for ~12 strokes before taking another breath. We sought to examine the effects of CFB training on reducing respiratory muscle fatigue (RMF). Elite swimmers (n = 25) were divided into either the CFB or a group that breathed regularly, every ~3rd stroke. The training intervention included 16 sessions of 12x50-m repetitions with either breathing pattern. RMF was defined as the drop in maximal inspiratory mouth-pressure (MIP) between rest and 46 seconds after a 200 yard free-style swimming race (~114 seconds). Pooled results demonstrated a reduction in MIP after the race at baseline (-11%, p