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Neck and Shoulder Muscle Fatigue in High Performance Aircrafts Pilots: Effects of a Training Program (Part 2)

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Advances in Social and Occupational Ergonomics (AHFE 2019)

Abstract

The aim of the study is to investigate the effect of a specific training on muscle fatigue by means of the analysis of the amplitude and spectral parameters of surface electromyography.

This report is a second part of our first paper on muscle fatigue in high performance pilots.

One experienced jet pilot was enrolled for this study. sEMG activity of the neck and shoulder muscles was recorded before and soon after a flight on European Fighter Aircraft. Afterwards, the pilot followed a specific neck and shoulder muscles training and he was recorded before and soon after a flight. Muscle activity was recorded bilaterally from Sternocleidomastoid, Upper and Middle Trapezius muscles. The temporal changes of amplitude and frequency of the sEMG signals were calculated on root mean square values, median frequency of the power spectrum and on spectral full width at half maximum.

The main finding of this study is that training strengthened the muscles of both the dominant and non-dominant side, as through the fatigue indexes we observed less fatigue after flight after the training.

It is possible to conclude that it would be important to incorporate neck and shoulder specific training in the list of operational duties. Moreover, by studying sEMG fatigue parameters, it is possible to obtain more detailed information about neck stress in order to deeper understand some of the causative factors for neck pain, so it would be possible to provide recommendations and tools to increase and improve the career longevity of jet pilots.

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Acknowledgements

Paper edited by Lucia Falco.

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Correspondence to Giorgia Chini .

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Appendix

Appendix

Tables

Table 1. Task run order before the flight. Abbreviations used: C40 = isometric contraction at 40% of the isometric maximal voluntary contraction; C60 = isometric contraction at 60% of the isometric maximal voluntary contraction; iMVC = isometric maximal voluntary contraction; SCM = sternocleidomastoid; MT = middle trapezius; UT = upper trapezius.
Table 2. Task run order after the flight. Abbreviations used: C40 = isometric contraction at 40% of the isometric maximal voluntary contraction; C60 = isometric contraction at 60% of the isometric maximal voluntary contraction; SCM = sternocleidomastoid; MT = middle trapezius; UT = upper trapezius.
Table 3. Difference after and before the flight for each index (delta), both before (pre) and after the training (post). Abbreviations used: C40 = isometric contraction at 40% of the isometric maximal voluntary contraction; C60 = isometric contraction at 60% of the isometric maximal voluntary contraction; SCM = sternocleidomastoid; MT = middle trapezius; UT = upper trapezius.
Table 4. Mean values of the maximum force value recorded with the dynamometer during the iMVC, for each investigated muscle before and after the training. Abbreviations used: iMVC = isometric maximal voluntary contraction; SCM = sternocleidomastoid; MT = middle trapezius; UT = upper trapezius.

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Chini, G. et al. (2020). Neck and Shoulder Muscle Fatigue in High Performance Aircrafts Pilots: Effects of a Training Program (Part 2). In: Goossens, R., Murata, A. (eds) Advances in Social and Occupational Ergonomics. AHFE 2019. Advances in Intelligent Systems and Computing, vol 970. Springer, Cham. https://doi.org/10.1007/978-3-030-20145-6_43

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  • DOI: https://doi.org/10.1007/978-3-030-20145-6_43

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