Post on 21-Jan-2016
description
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Inhomogeneity of capacity requirements and their risks on commercially guided ski tours with leisure sport
orientated ski tour participants
Diplom-Sportwissenschaftlerin Nina Reichwein
Institute for sport scienceRuhr - University Bochum, Germany
International symposium "High altitude influence on human performance: science and praxis IV"
from 08.-13.09.2009Bohinjska Bela , Slowenia
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introduction, aim, material & methods, results, discussion, conclusion
Rising Popularity of ski touring in leisure sport sector
- 1,2 mio. hours (1980) → 20mio. hours (2006) (Zeigler, 2006)
-2006: 1mio. estimated ski touring people in leisure sport sector in european alps (Burtscher, 2006)
_______________________________________________________Nina Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela
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introduction, aim, material & methods, results, discussion, conclusion
Rising popularity of ski touring
Commercial mountain sport schools widen spectrum of ski
tour supplies
↓
2008: 95% of german commercial mountain
sport schools offer ski tours in european alps or even beyond
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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Organizer´s aim:
minimize safety risks during ski tour
↓homogenous group
composition
↓- detailed tour description on
organizer´s homepage
- verbally given tour information via telephone or
Ski tour requirements
↓? Decision of
psychological & physiological
suitability to ski tour´s requirements… ¿
↓… is left up to leisure sport orientated competitioners
= frequently inexperienced laypersons
introduction, aim, material & methods, results, discussion, conclusion
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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Question:
Do the tour descriptions announced by the organizer present sufficient information in order to reduce the individual´s and the group´s safety risks by a selfreliant assessment of capacity?
introduction, aim, material & methods, results, discussion, conclusion
Aim of the study:
Assessment of the group-internal degree of inhomogeneity concerning the capacity during ascents of commercially guided ski tours.
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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introduction, aim, material & methods, results, discussion, conclusion
Three commercially guided ski tours: 1680 – 3180 masl
T1: n= 6
T2: n= 5
T3: n= 10
→
→
→
n1= 4 (3♀,1♂, age: 36 ♀,1♂, age: 36 ± 5,83, BMI: 23 ± 1,77)
n2= 4 (4♀, age: 35,5 ± 5, BMI: 22,6 ± 1,51)
n3= 4 (2♀,♀,2♂, ♂, age: 49 ± 8,37, BMI: 23,8 ± 2,14)
Physiological strain parameters:
- average heart rate
- lactate values
Subjectively perceived exertion level:
- modified RPE-scale 1-15
Degree of inhomogeneity:
Coefficient of variation V
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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Start
Ziel
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introduction, aim, material & methods, results, discussion, conclusion
avg cardial strain inhomogeneity
avg metabolic strain inhomogeneity
T1 6,1% 42,6%
T2 4,5% 35,7%
T3 4,4% 46,7%
32,2% of all lactate values exceed 4mmol/l lactate threshold
avg perceived exertion inhomogeneity
T1 23,4%
T2 12,4%
T3 23,0%
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Organizer´s aim:
minimize safety risks during ski tour
↓homogenous group
composition
↓- detailed tour description on
organizer´s homepage
- verbally given tour information via telephone or
Ski tour requirements
↓? Decision of
psychological & physiological
suitability to ski tour´s requirements… ¿
↓… is left up to leisure sport orientated competitioners
= frequently inexperienced laypersons
introduction, aim, material & methods, results, discussion, conclusion
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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12
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introduction, aim, material & methods, results, discussion, conclusion
State:
Group internal inhomogeneity under same conditions
Explanations:
-Participants made blatant misjudgement of their capacity requirements
- Pre-description of the tour does not last out a satisfactiory homogeneity of capacity within ski touring group
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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Suggested solutions
1) for responsible organizers/ mountain guides:
→ performance test under real conditions
→ tour adaption to current state of capacity afterwards
introduction, aim, material & methods, results, discussion, conclusion
2) appeal to participants:
→ truthful self-estimation of one´s state of capacity
→ avoidance of fake ambition at the interpretation of
tour description_______________________________________________________
N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia
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Thank you for your attention!
_______________________________________________________N. Reichwein, Inhomogeneity during ski tour ascents, Bohinjska Bela/ Slowenia