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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,

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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

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slide2

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

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

1) test: handling a rope

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

2) test: handling snap hooks

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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)

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims, methods, results, discussion, final conclusion

results

No principle problems during

the alltogether 45 experiments

with the 9 subjects

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

discussion

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

median split

test: handling a rope

< median > median

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

median split (2)

relative average difference of needed test-time: 4500 m - average 0 m

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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”

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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introduction, aims,methods, results, discussion, final conclusion

Thanks for your attention

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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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.

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Schwager et al.: Coordination under Hypoxia, 4th Symposium, 2009

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