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Effects of inspiratory muscle training on physical performance during backpack carrying
ID Jeruc Tanšek, Monika (Author), ID Švent, Andrej (Author), ID Kacin, Alan (Author)

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Abstract
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.

Language:English
Keywords:load-carrying, respiratory muscle fatigue, respiratory muscle training, thoracic motion restriction
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:ZF - Faculty of Health Sciences
Publication status:Published
Publication version:Version of Record
Publication date:30.12.2022
Year:2022
Number of pages:Str. 5-21
Numbering:Vol. 13, no. 1
PID:20.500.12556/RUL-143631 This link opens in a new window
UDC:612.2:613.73
ISSN on article:2335-4240
DOI:10.35469/ak.2022.335 This link opens in a new window
COBISS.SI-ID:136088835 This link opens in a new window
Publication date in RUL:04.01.2023
Views:287
Downloads:50
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Record is a part of a journal

Title:Annales kinesiologiae
Shortened title:Ann. kinesiol.
Publisher:Univerza na Primorskem, Znanstveno-raziskovalno središče, Univerzitetna založba Annales, Univerza na Primorskem, Znanstveno-raziskovalno središče, Univerzitetna založba Annales2010-2016, Znanstveno-raziskovalno središče Koper, Annales ZRS
ISSN:2335-4240
COBISS.SI-ID:269008128 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:30.12.2022

Secondary language

Language:Slovenian
Title:Učinki vadbe inspiratornih mišic na telesno zmogljivost med nošenjem nahrbtnika
Abstract:
Cilj: Omejitev gibanja prsnega koša med nošnjo obteženega nahrbtnika zmanjša učinkovitost in poveča delo dihalnih mišic. Cilj pričujoče študije je bil raziskati učinke šesttedenske vadbe inspiratornih mišic (VIM) na jakost in vzdržljivost dihalnih mišic ter telesno zmogljivost med prenašanjem bremena. Metode: Prostovoljno je sodelovalo 20 moških (starost: 32,2 ± 3,4 let) pripadnikov Enote za specialno delovanje Slovenske vojske. Eksperimentalna skupina (n=10) je šest tednov neprekinjeno vadila proti naraščajočemu uporu pri vdihu s posebno dihal-no napravo. Placebo skupina (n=10) je izvedla enak protokol VIM z napravo, vendar le z navideznim inspiratornim uporom. Začetno in končno testiranje preiskovancev je vključevalo meritve največjih inspiratornih in ekspiratornih tlakov, meritve frekvence srčnega utripa in oceno občutenja telesnega in dihalnega napora pred in po 60-minu-tnem testu hoje s 25-kg nahrbtnikom. Rezultati: Po šesttedenski VIM se je največji inspiratorni tlak izmerjen pred in po testu hoje pomembno (P < 0,001) povečal v eksperimentalni skupini, in sicer za 47 ± 13 % pred testom in za 58 ± 20 % po testu. Značilno se je zmanjšala tudi inspiratorna utrujenost v eksperimentalni skupini. Odziv frekvence srčnega utripa in ocena občute-nja napora med testom hoje se po VIM ni spremenila. V placebo skupini po VIM nismo opazili pomembnih sprememb v nobenem izmerjenem parametru. Zaključek: Šesttedenska VIM s progresivnim inspiratornim uporom izboljša jakost inspiratornih mišic in zmanjša njihovo utrudljivost. Tovrstna dihalna vadba ima lahko pozitivne učinke za ljudi med opravljanjem nalog, ki zahtevajo dolgotrajno nošenje težkega nahrbtnika.

Keywords:prenašanje bremen, utrujenost dihalnih mišic, vadba dihalnih mišic, omejitev gibanja prsnega koša

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