Inspiratory Muscle Training Improves Aerobic Fitness in Active Children

Ching-Hsin Lin, Chih-Wei Lee and Chien-Hui Huang ()
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Ching-Hsin Lin: Division of Rehabilitation Technology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970473, Taiwan
Chih-Wei Lee: Department of Physical Therapy, Tzu Chi University, Hualien 970374, Taiwan
Chien-Hui Huang: Department of Physical Therapy, Tzu Chi University, Hualien 970374, Taiwan

IJERPH, 2022, vol. 19, issue 22, 1-10

Abstract: Research on the effect of inspiratory muscle training (IMT) on exercise performance is inconsistent. IMT has not been applied to fit child athletes, who are more likely to develop inspiratory muscle fatigue, and, consequently, to benefit from IMT. Methods: Thirty children (mean age: 10.7 ± 1.2 years) were recruited and randomly assigned to a high-intensity (HG), a low-intensity (LG), or a control group (CG). For both training groups, a double-blind procedure was applied. In the HG, 80% of maximal inspiratory pressure (MIP) was used as the level of training intensity. The LG used 30% MIP. Training groups were trained at 6 breaths a set, 4 sets a day, totaling 24 breaths a day for 6 weeks. Exercise capacity outcomes include maximal and submaximal aerobic capacity, as measured as VO 2 max and distance from six-minute walk test (6MWD). Results show improvement in MIP, VO 2 max, and 6MWD only in the HG. MIP in the HG significantly increases from 108.7 (100.8–143.3) to 144.4 (130.0–175.6) cmH 2 O. VO 2 max in the HG increases from 43.0 (40.5–45) to 53.0 (46–63) mL·kg −1 ·min −1 . The 6MWD increases from 792.0 (737.5–818.0) to 862.0 (798.5–953.5) m. Data are presented as median (interquartile range). No difference is found in the LG or CG. Conclusion: high-intensity IMT increases MIP, maximal, and submaximal exercise capacity in the HG, but no difference is found in the LG or CG. Therefore, high-intensity type of IMT improves aerobic fitness in fit children by appropriately applying inspiratory muscle strength training.

Keywords: maximal inspiratory pressure; six-minute walk distance; aerobic fitness; VO 2 max; inspiratory muscle training (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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