Effects of inspiratory muscle training on physical performance during backpack carrying
DOI:
https://doi.org/10.35469/ak.2022.335Keywords:
load carrying, respiratory muscle fatigue, respiratory muscle training, thoracic motion restrictionAbstract
Purpose: Restricting chest movement when carrying a loaded backpack reduces efficiency and increases the work of the respiratory muscles. The aim of the present study was to investigate the effects of six weeks of inspiratory muscle training (IMT) on respiratory muscle strength and endurance and on physical performance when carrying a load.
Methods: Twenty male (age: 32.2 ± 3.4 years) members of the Special Operations Unit of the Slovenian Army volunteered to participate. The experimental group (n=10) trained their respiratory muscles for six weeks against an incremental inspiratory resistance with a breathing apparatus. The placebo group (n=10) performed the same IMT protocol but with a sham inspiratory resistance. Assessment of the subjects before and after IMT included measurements of the maximal inspiratory and expiratory pressures, heart rate measurements, and ratings of perceived physical and respiratory exertion before and after a 60-min walk test with a 25-kg backpack.
Results: After six weeks of IMT, the maximum inspiratory pressure measured before and after the 60-minute walk test increased significantly (p < 0.001) in the experimental group by 47 ± 13% and 58 ± 20%, respectively. Inspiratory fatigue was also significantly lower in the experimental group. No changes were observed in the heart rate and the rating of perceived exertion during the walking test. In the placebo group, no significant changes were observed in the measured parameters after IMT.
Conclusion: Six weeks of IMT with progressive breathing resistance improves strength and reduces fatigue of the respiratory muscles. Individuals who perform tasks that require them to carry a heavy backpack for extended periods of time may benefit from IMT.
References
Armstrong, N. C. D., Ward, A., Lomax, M., Tipton, M. J. & House, J. R. (2019) Wearing body armour and backpack loads increase the likelihood of expiratory flow limitation and respiratory muscle fatigue during marching. Ergonomics, 62(9), 1181-1192. https://doi.org/10.1080/00140139.2019.1629638
Borg, G. A. V. (1982). Psychophysical bases of perceived exertion. Medicine & Science in Sports & Exercise 14 (5), 377−381. https://doi.org/10.1249/00005768-198205000-00012
Butcher, S. J., Jones, R. L., Eves, N. D., & Petersen, S. R. (2006). Work of breathing is increased during exercise with the self-contained breathing apparatus regulator. Applied Physiology, Nutrition, and Metabolism 31(6), 693−701. https://doi.org/10.1139/h06-073.
Dempsey, J. A., Romer, L. M., Rodman, J., Miller, J., & Smith, C. (2006). Consequences of exercise-induced respiratory muscle work. Respiratory Physiology & Neurobiology, 151(2/3), 242–250. https://doi.org/10.1016/j.resp.2005.12.015
Dominelli, P. B., Sheel, A. W., & Foster G. E. (2012). Effect of carrying a weighted backpack on lung mechanics during treadmill walking in healthy men. European Journal of Applied Physiology, 112(6), 2001–2012. https://doi.org/10.1007/s00421-011-2177-8
Eves, N. D., Jones, R. L., & Petersen, S. R. (2005). The influence of the self-contained breathing apparatus (SCBA) on ventilatory function and maximal exercise. Canadian Journal of Applied Physiology 30(5), 507−519. https://doi.org/10.1139/h05-137
Faghy, M., Blacker, S., & Brown, P. I. (2016). Effects of load mass carried in a backpack upon respiratory muscle fatigue. European Journal of Sport Science, 16(8), 1032−1038. https://doi.org/10.1080/17461391.2016.1202326
Faghy, M. A., & Brown, P. I. (2014a). Preloaded time-trial to assess load carriage performance. Journal of Strength and Conditioning Research, 28(12), 3354–3362. https://doi.org/10.1519/JSC.0000000000000555
Faghy, M. A., & Brown, P. I. (2014b). Thoracic load carriage-induced respiratory muscle fatigue. European Journal of Applied Physiology, 114(5), 1085–1093. https://doi.org/10.1007/s00421-014-2839-4
Faghy, M. A., & Brown, P. I. (2016). Training the inspiratory muscles improves running performance when carrying a 25 kg thoracic load in a backpack. European Journal of Sport Science, 16(5), 585−594. https://doi.org/10.1080/17461391.2015.1071878
Fernández-Lázaro, D., Gallego-Gallego, D., Corchete, L. A., Fernández Zoppino, D., González-Bernal, J. J., García Gómez, B., & Mielgo-Ayuso, J. (2021). Inspiratory muscle training program using the PowerBreathe®: does it have ergogenic potential for respiratory and/or athletic performance? A systematic review with meta-analysis. International Journal of Environmental Research and Public Health, 18(13), 6703−6710. https://doi.org/10.3390/ijerph18136703
Griffiths, L. A., & McConnell, A. K. (2007). The influence of inspiratory and expiratory muscle training upon rowing performance. European Journal of Applied Physiology, 99(5), 457−466. https://doi.org/10.1007/s00421-006-0367-6
HajGhanbari, B., Yamabayashi, C., Buna, T. R., Coelho, J. D., Freedman, K. D., Morton, T. A., ... Reid, W. D. (2013). Effects of respiratory muscle training on performance in athletes: a systematic review with meta-analyses. Journal of Strength and Conditioning Research, 27(6), 1643−1663. https://doi.org/10.1519/JSC.0b013e318269f73f
Harms, C. A., Babcock, M. A., McClaran, S. R., Pegelow, D. F., Nickele, G. A., Nelson, W. B., Dempsey, J. A. (1997). Respiratory muscle work compromises leg blood flow during maximal exercise. Journal of Applied Physiology, 82(5), 1573–1583. https://doi.org/10.1152/jappl.1997.82.5.1573
Illi, S. K., Held, U., Frank, I., Spengler, C. M. (2012). Effect of respiratory muscle training on exercise performance in healthy individuals: a systematic review and meta-analysis. Sports Medicine 42(8), 707−724. https://doi.org/10.1007/BF03262290
Ivšek, C., & Pograjc, L. (2014). Priročnik splošne kondicijske priprave [General fitness training manual](pp. 6−64). Ljubljana: Center vojaških šol.
Janssens, L., McConnell, A. K., Pijnenburg, M., Claeys, K., Goossens, N., Lysens, R., ... Brumagne, S. (2015). Inspiratory muscle training affects proprioceptive use and low back pain. Medicine & Science in Sports & Exercise 47(1), 12–19. https://doi.org/10.1249/MSS.0000000000000385
Johnson, M. A., Sharpe, G. R., & Brown, P. I. (2007). Inspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power. European Journal of Applied Physiology, 101(6), 761–770. https://doi.org/10.1007/s00421-007-0551-3
Karsten, M., Ribeiro, G. S., Esquivel, M. S., & Matte, D. L. (2018). The effects of inspiratory muscle training with linear workload devices on the sports performance and cardiopulmonary function of athletes: A systematic review and meta-analysis. Physical Therapy in Sport, 34, 92-104. https://doi.org/10.1016/j.ptsp.2018.09.004.
Knapik, J., Harman, E. A., Steelman, R. A., & Graham, B. S. (2012). A systematic review of the effects of physical training on load carriage performance. Journal of Strength and Conditioning Research, 26(2), 585–597. https://doi.org/10.1519/JSC.0b013e3182429853.
McConnell A. K. (2011). Breathe strong perform better. USA. Human Kinetics: 12−55.
McConnell, A. K. (2013). Respiratory muscle training: theory and practice (pp 22−76). Edinburgh, Churchill Livingstone: Elsevier.
Romer, L. M., McConnell, A. K., & Jones, D. A. (2002). Inspiratory muscle fatigue in trained cyclists: Effects of inspiratory muscle training. Medicine & Science in Sports & Exercise 34(5), 785–792. https://doi.org/10.1097/00005768-200205000-00010
Romer, L. M., & Polkey, M. I. (2008). Exercise-induced respiratory muscle fatigue: implications for performance. Journal of Applied Physiology, 104(3), 879–888. https://doi.org/10.1152/japplphysiol.01157.2007
Sales, A. T., Fregonezi, G. A., Ramsook, A. H., Guenette, J. A., Lima, I. N., & Reid, W. D. (2016). Respiratory muscle endurance after training in athletes and non-athletes: a systematic review and meta-analysis. Physical Therapy in Sport, 17(January), 76–86. https://doi.org/10.1016/j.ptsp.2015.08.001
Shei, R. J., Chapman, R. F., Gruber, A. H., Mickleborough, T. D. (2017). Respiratory effects of thoracic load carriage exercise and inspiratory muscle training as a strategy to optimize respiratory muscle performance with load carriage. Springer Science Reviews, 5(1-2), 49−64. https://doi.org/10.1007/s40362-017-0046-5
Tong, T. K., Fu, F. H., Chung, P., Eston, R., Lu, K., Quach, B., … So, R. (2008). The effect of inspiratory muscle training on high-intensity, intermittent running performance to exhaustion. Applied Physiology, Nutrition, and Metabolism, 33(4), 671−681. https://doi.org/10.1139/H08-050
Verges, S., Lenherr, O., Haner, A. C., Schulz, C., & Spengler, C. M. (2007). Increased fatigue resistance of respiratory muscles during exercise after respiratory muscle endurance training. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 292(3), R1246–R1253. https://doi.org/10.1152/ajpregu.00409.2006
Yañez-Sepulveda, R., Alvear-Ordenes, I., Tapia-Guajardo, A., Verdugo-Marchese, H., Cristi-Montero, C., & Tuesta, M. (2021). Inspiratory muscle training improves the swimming performance of competitive young male sprint swimmers. The Journal of Sports Medicine and Physical Fitness, 61(10),1348-1353. https://doi.org/10.23736/S0022-4707.21.11769-4
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