Inspiratory muscle training improves the swimming performance of competitive young male sprint swimmers

Rodrigo Yañez-Sepulveda, Ildefonso Alvear-Ordenes, Alvaro Tapia-Guajardo, Humberto Verdugo-Marchese, Carlos Cristi-Montero, Marcelo Tuesta

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: Inspiratory muscle training (IMT) stimulates the strengthening of the respiratory muscles by placing a resistance to the entry of air into the lung. The objective was to observe the effect of IMT on swimming performance, and its relationship with inspiratory strength and lung function. METHODS: Fifteen male swimmers (age=15.1±1.1 years) were divided into an experimental group (EG; N.=9) and a sham control group (SCG; N.=6). Lung flows/volumes using spirometry, dynamic inspiratory strength (S-Index), maximum inspiratory flow (MIF), and swimming tests (50-m, 100-m and 200-m) were measured before and after a four-week aerobic swimming training program (R1-R2) and IMT. An initial load at 50% and 15% of S-Index was adjusted for EG and SCG respectively. Only the EG increased the initial load by 5% each week. RESULTS: The S-Index and MIF were only increased in the EG after IMT (∆S-Index=18.0±8.8 cmH2O and ∆MIF=0.7±0.33 L·min-1; P<0.05). The same occurred for FVC (∆=0.3±0.2 l), and MVV (∆=6.9±3.6 l·min-1) (P<0.05). For swimming performances, the EG swimming times decreased significantly respect to CG for 50-m (∆EG=-1.2±0.3 s vs. ∆CG=-0.1±0.2 s), 100-m (∆EG=-2.9±1 s vs. ∆CG=-0.7±0.5 s) and 200-m (∆EG=-7.3±2.8 s vs. ∆CG=-2.0±1 s) with P<0.05. Finally, the S-Index and MIF had a negative correlation with swimming performances for 50-m (S-Index, r=-0.72; MIF, r=-0.70) and 100-m (S-Index, r=-0.65; MIF, r=-0.62) with P<0.05. CONCLUSIONS: A short-period IMT increases the maximum S-Index, ventilation and MIF which positively influence the swimming performance of young swimmers. (Cite this article as: Yañez-Sepulveda R, Alvear-Ordenes I, Tapia-Guajardo A, Verdugo-Marchese H, Cristi-Montero C, Tuesta M. Inspiratory muscle training improves the swimming performance of competitive young male sprint swimmers. J Sports Med Phys Fitness 2021;61:1348-53. DOI: 10.23736/S0022-4707.21.11769-4)

Original languageEnglish
Pages (from-to)1348-1453
Number of pages106
JournalJournal of Sports Medicine and Physical Fitness
Volume61
Issue number10
DOIs
StatePublished - Oct 2021
Externally publishedYes

Keywords

  • Athletic performance
  • Inspiratory capacity
  • Respiratory function tests
  • Swimming

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