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Coordination during acute isobaric hypoxia without exercise

This study investigates the influence of hypoxia on motor coordination at high altitudes. Tests were conducted simulating practical mountaineering tasks under varying levels of hypoxia. Results suggest a mild effect of hypoxia on coordination, with individual variation.

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Coordination during acute isobaric hypoxia without exercise

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  1. Coordination during acute isobaric hypoxia without exercise corresponding to altitudes until 4500 m Marius Schwager (sports science student), Dr. Sonja Claus (medic), Dr. Hermann Claus (medic), Prof. i. R. Dr. H.-V. Ulmer (physiologist) Institute for sports science, Johannes Gutenberg-Universität, Mainz, Germany marius.schwager@gmx.de 4th international Symposium:“High altitude influence on human performance: science and praxis” – Bohinjska Bela (Slovenia) Sept. 8-13, 2009 1

  2. introduction, aims, methods, results, diskussion, conclusion introduction • mountaineering in high altitude has lots of consequences for human body • metabolic aspects/physical fatigue are analyzed well • previous study (BURKHARDT 2007) underlines that: • motor aspects are not well analyzed for moderate altitudes • hypoxia might influence coordination • high altitudes above ~4000 m: strong effect on body and central nervous system ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 2

  3. Introduction, aims,methods, results, discussion, final conclusion aims • show influence of hypoxia on motor aspects • focus on „touristical height“ until 4500 m (europe, alps) • show progress from low heights to medium heights (2500-4500 m) • exclude metabolic aspects/physical fatigue • use task-typical tests ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 3

  4. introduction, aims,methods, results, discussion, final conclusion methods 9 subjects 5 female, 4 male, (students with inconspicuous Hb-values) • sitting in a chair in front of table • performing 2 tests after a pretest-training until plateau values • use of breathing mask: simulating hypoxia via O2-reduction • simulating practical-relevant tasks for mountaineering: • handling a rope • handling snap hooks ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 4

  5. introduction, aims,methods, results, discussion, final conclusion 1) test: handling a rope ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 5

  6. introduction, aims,methods, results, discussion, final conclusion 2) test: handling snap hooks ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 6

  7. introduction, aims,methods, results, discussion, final conclusion • isobaric hypoxia was generated (Hypoxico, USA), for 10 min, each • 4 levels: low level: “0 m” (= niveau of Mainz), 2500 m, • 3500 m and 4500 m • systematically changing order • one repetition and a control series (“0 m” low level). • Measurements of: • needed test-time (accuracy: 0.2 s) • inspiratory O2-concentration • heart rate (fingerclip oxymeter) • Hb-saturation (fingerclip oxymeter) ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 7

  8. introduction, aims, methods, results, discussion, final conclusion results No principle problems during the alltogether 45 experiments with the 9 subjects ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 8

  9. introduction, aims,methods, results, discussion, final conclusion ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 9

  10. introduction, aims,methods, results, discussion, final conclusion ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 10

  11. introduction, aims,methods, results, discussion, final conclusion discussion ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 11

  12. introduction, aims,methods, results, discussion, final conclusion median split test: handling a rope < median > median ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 12

  13. introduction, aims,methods, results, discussion, final conclusion median split (2) relative average difference of needed test-time: 4500 m - average 0 m ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 13

  14. introduction, aims,methods, results, discussion, final conclusion • regarding means of test-times: • no influence of training effects • (continuous) increase from 2500 m – 4500 m • effect of hypoxia measurable after 10 min of exposition, each level • allover only a very light effect • the coordination is only lightly affected by hypoxia • some individuals are higher affected then others • depending on personal disposition • some subjects had problems with handling snap hooks and rope • add measurement: “movement quality” ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 14

  15. introduction, aims,methods, results, discussion, final conclusion final conclusions • only very light effect of hypoxia on coordination until 4500 m while rest (no physical action) • some individuals more affected then others • coordinative influence depending distinclyon personal disposition • stronger negative effect on coordination might be possible • add intensive physical exercise ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 15

  16. introduction, aims,methods, results, discussion, final conclusion Thanks for your attention ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 16

  17. introduction, aims,methods, results, discussion, final conclusion Literature 1. BEITZEL, K. (2006): Auswirkungen hypobarer Hypoxie auf die Reaktionsfähigkeit im Alter, Dissertation, Hohe Medizinische Fakultät, Bonn, http://hss.ulb.uni-bonn.de/diss_online/med_fak/2006/beitzel_knut. 2. BURKHARDT, T. (2007): Der Einfluss des Sauerstoffmangels auf die Koordination bzw. Technik beim Bergsport. Diplomarbeit, Institut für Sportwissenschaft Mainz, abstract under: http://www.uni-mainz.de/FB/Sport/physio/pdffiles/BURKHARDT_DiplKurzf_XI-07.pdf.3. ELSNER, D., HAASE, J. (2000): Bergsport-Handbuch, Reinbek bei Hamburg.4. MEINEL, K., SCHNABEL, G. (2008). Bewegungslehre – Sportmotorik, Aachen. ________________________________________________________ Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009 17

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