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Controlled‐frequency breath swimming improves swimming performance and running economy
Author(s) -
Lavin K. M.,
Guenette J. A.,
Smoliga J. M.,
Zavorsky G. S.
Publication year - 2015
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/sms.12140
Subject(s) - medicine , running economy , limiting , hypercapnia , respiratory system , physical therapy , cardiology , vo2 max , anesthesia , heart rate , blood pressure , mechanical engineering , engineering
Respiratory muscle fatigue can negatively impact athletic performance, but swimming has beneficial effects on the respiratory system and may reduce susceptibility to fatigue. Limiting breath frequency during swimming further stresses the respiratory system through hypercapnia and mechanical loading and may lead to appreciable improvements in respiratory muscle strength. This study assessed the effects of controlled‐frequency breath ( CFB ) swimming on pulmonary function. Eighteen subjects (10 men), average (standard deviation) age 25 (6) years, body mass index 24.4 (3.7) kg/m 2 , underwent baseline testing to assess pulmonary function, running economy, aerobic capacity, and swimming performance. Subjects were then randomized to either CFB or stroke‐matched (SM) condition. Subjects completed 12 training sessions, in which CFB subjects took two breaths per length and SM subjects took seven. Post‐training, maximum expiratory pressure improved by 11% (15) for all 18 subjects ( P < 0.05) while maximum inspiratory pressure was unchanged. Running economy improved by 6 (9)% in CFB following training ( P < 0.05). Forced vital capacity increased by 4% (4) in SM ( P < 0.05) and was unchanged in CFB . These findings suggest that limiting breath frequency during swimming may improve muscular oxygen utilization during terrestrial exercise in novice swimmers.