Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners
<i>Background and objectives:</i> Respiratory muscle fatigue is one of the important factors limiting sports performance due to the metaboreflex. This reflex will cause a decrease in blood flow to the extremities and accelerate exercising limb fatigue. Previous studies found that inspira...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Medicina |
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| Online Access: | https://www.mdpi.com/1010-660X/57/1/72 |
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| author | Yun-Chi Chang Hsiao-Yun Chang Chien-Chang Ho Po-Fu Lee Yi-Chen Chou Mei-Wun Tsai Li-Wei Chou |
| author_facet | Yun-Chi Chang Hsiao-Yun Chang Chien-Chang Ho Po-Fu Lee Yi-Chen Chou Mei-Wun Tsai Li-Wei Chou |
| author_sort | Yun-Chi Chang |
| collection | DOAJ |
| description | <i>Background and objectives:</i> Respiratory muscle fatigue is one of the important factors limiting sports performance due to the metaboreflex. This reflex will cause a decrease in blood flow to the extremities and accelerate exercising limb fatigue. Previous studies found that inspiratory muscle training (IMT) can effectively enhance the respiratory muscle endurance and reduce fatigue during long-duration exercise or aerobic exercise, thereby enhancing athletic performance. However, the mechanism between inspiratory muscle strength, change of limb blood flow and sports performance still requires investigation, especially in short-duration exercise, anaerobic or both aerobic and anaerobic exercise. The purpose of this study was to investigate the effects of 4-week inspiratory muscle training on respiratory muscle strength, limb blood flow change rate and sports performance in recreational 800-m college runners. <i>Materials and Methods:</i> Twenty healthy 800-m college runners randomized into the IMT group (11 subjects) and control group (9 subjects). IMT consisted of 30 inspiratory efforts twice daily, 5 days a week, with intensity at 50%, 60%, 70% and 80% of maximum inspiratory pressure (MIP) for 4 weeks, while a control group kept 50% of MIP for 4 weeks. An 800-m trial test, limb blood flow change rate by using Impedance Plethysmography, and MIP were as the outcome measured variables and be evaluated. All measured variables were assessed before and after 4-week IMT training. Two-way ANOVA was conducted for statistical analysis. <i>Results:</i> The results showed significantly interaction between groups and pre-posttest. IMT group significantly decreased limb blood flow change rate from 19.91 ± 11.65% to 9.63 ± 7.62% after received the IMT training program (<i>p</i> < 0.05). The MIP significantly improved from 112.95 ± 27.13 cmH<sub>2</sub>O to 131.09 ± 28.20 cm H<sub>2</sub>O in IMT group, and the 800-m trial test also shorted the running time from 162.97 ± 24.96 s to 156.75 ± 20.73 s. But the control group no significantly changed in MIP and 800-m trial test. <i>Conclusions:</i> Our results indicated that the 4-week IMT training (twice a day, 5 days a week) significantly improves participants’ inspiratory muscle strength, 800-m running performance and decreases the limb blood flow change rate. |
| first_indexed | 2024-03-12T08:32:46Z |
| format | Article |
| id | doaj.art-59c1d662de014629a86a982f41e3d02a |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-12T08:32:46Z |
| publishDate | 2021-01-01 |
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| spelling | doaj.art-59c1d662de014629a86a982f41e3d02a2023-09-02T17:28:49ZengMDPI AGMedicina1010-660X2021-01-0157727210.3390/medicina57010072Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track RunnersYun-Chi Chang0Hsiao-Yun Chang1Chien-Chang Ho2Po-Fu Lee3Yi-Chen Chou4Mei-Wun Tsai5Li-Wei Chou6Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei 112, TaiwanDepartment of Athletic Training and Health, National Taiwan Sport University, Taoyuan 333, TaiwanDepartment of Physical Education, Fu Jen Catholic University, New Taipei City 242, TaiwanDepartment of Physical Education, Fu Jen Catholic University, New Taipei City 242, TaiwanPhysical Education Office, National Tsing Hua University, Hsinchu City 300, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei 112, TaiwanDepartment of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei 112, Taiwan<i>Background and objectives:</i> Respiratory muscle fatigue is one of the important factors limiting sports performance due to the metaboreflex. This reflex will cause a decrease in blood flow to the extremities and accelerate exercising limb fatigue. Previous studies found that inspiratory muscle training (IMT) can effectively enhance the respiratory muscle endurance and reduce fatigue during long-duration exercise or aerobic exercise, thereby enhancing athletic performance. However, the mechanism between inspiratory muscle strength, change of limb blood flow and sports performance still requires investigation, especially in short-duration exercise, anaerobic or both aerobic and anaerobic exercise. The purpose of this study was to investigate the effects of 4-week inspiratory muscle training on respiratory muscle strength, limb blood flow change rate and sports performance in recreational 800-m college runners. <i>Materials and Methods:</i> Twenty healthy 800-m college runners randomized into the IMT group (11 subjects) and control group (9 subjects). IMT consisted of 30 inspiratory efforts twice daily, 5 days a week, with intensity at 50%, 60%, 70% and 80% of maximum inspiratory pressure (MIP) for 4 weeks, while a control group kept 50% of MIP for 4 weeks. An 800-m trial test, limb blood flow change rate by using Impedance Plethysmography, and MIP were as the outcome measured variables and be evaluated. All measured variables were assessed before and after 4-week IMT training. Two-way ANOVA was conducted for statistical analysis. <i>Results:</i> The results showed significantly interaction between groups and pre-posttest. IMT group significantly decreased limb blood flow change rate from 19.91 ± 11.65% to 9.63 ± 7.62% after received the IMT training program (<i>p</i> < 0.05). The MIP significantly improved from 112.95 ± 27.13 cmH<sub>2</sub>O to 131.09 ± 28.20 cm H<sub>2</sub>O in IMT group, and the 800-m trial test also shorted the running time from 162.97 ± 24.96 s to 156.75 ± 20.73 s. But the control group no significantly changed in MIP and 800-m trial test. <i>Conclusions:</i> Our results indicated that the 4-week IMT training (twice a day, 5 days a week) significantly improves participants’ inspiratory muscle strength, 800-m running performance and decreases the limb blood flow change rate.https://www.mdpi.com/1010-660X/57/1/72respiratory muscle capabilityathletic performancemuscle fatigue |
| spellingShingle | Yun-Chi Chang Hsiao-Yun Chang Chien-Chang Ho Po-Fu Lee Yi-Chen Chou Mei-Wun Tsai Li-Wei Chou Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners Medicina respiratory muscle capability athletic performance muscle fatigue |
| title | Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners |
| title_full | Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners |
| title_fullStr | Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners |
| title_full_unstemmed | Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners |
| title_short | Effects of 4-Week Inspiratory Muscle Training on Sport Performance in College 800-Meter Track Runners |
| title_sort | effects of 4 week inspiratory muscle training on sport performance in college 800 meter track runners |
| topic | respiratory muscle capability athletic performance muscle fatigue |
| url | https://www.mdpi.com/1010-660X/57/1/72 |
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