Contribution of the legs to double-poling performance in elite cross-country skiers.

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Contribution of the legs to double-poling performance in elite cross-country skiers.

Holmberg, Hans-Christer (författare): Karolinska Institutet,Mittuniversitetet,Institutionen för hälsovetenskap (-2013),Nationellt Vintersportcentrum / Swedish Winter Sports Research Centre,Mittuniversitetet, Institutionen för hälsovetenskap

Lindinger, Stefan, 1968 (författare): Gothenburg University,Göteborgs universitet,Institutionen för mat, hälsa och miljö,Department of Food, Health and Environment,University of Salzburg, Austria

Stöggl, Thomas (författare): University of Salzburg, Austria

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Björklund, Glenn (författare): Mittuniversitetet,Institutionen för hälsovetenskap (-2013),Mittuniversitetet, Institutionen för hälsovetenskap

Müller, Erich (författare): University of Salzburg, Austria

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Ovid Technologies (Wolters Kluwer Health), 2006
2006
Engelska.
Ingår i: Medicine and science in sports and exercise. - : Ovid Technologies (Wolters Kluwer Health). - 0195-9131 .- 1530-0315. ; 38:10, s. 1853-60

Relaterad länk:: https://gup.ub.gu.se...; visa fler...; https://doi.org/10.1...; https://urn.kb.se/re...; https://urn.kb.se/re...; http://kipublication...; visa färre...

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Abstract Ämnesord

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In the classical style of cross-country skiing, the double-poling (DP) technique, which is regarded as an upper-body exercise, is used on the flatter parts of a course. Limited biomechanical and physiological data are available about DP compared with other cross-country skiing techniques. The purpose of the present study was to evaluate the possible role of the lower body during DP.Eleven elite cross-country skiers performed two incremental tests using DP roller skiing at 1 degree inclination on a treadmill with or without locking the knee and ankle joints (DPLOCKED and DPFREE). Maximal and peak oxygen uptake (VO2max and VO2peak) during classic diagonal skiing and DP, respectively, were measured. In addition, heart rate, blood lactate concentration, and maximal DP velocity (Vmax) were determined. Pole-ground reaction forces and joint angles (elbow, hip, knee, and ankle) were analyzed.The skiers obtained 7.7% higher VO2peak, 9.4% higher Vmax, and 11.7% longer time to exhaustion during DPFREE compared with DPLOCKED (all P < 0.05). There was a higher heart rate and blood lactate concentration in DPLOCKED at submaximal stages (all P < 0.05), with no difference in oxygen consumption. At 85% Vmax, corresponding to approximately 81% VO2peak FREE, the differences in physiological variables were accompanied by a 13.6% higher poling frequency, a 4.9% shorter poling phase, 13.3% shorter recovery phase, and 10.9% lower relative pole force in DPLOCKED (all P < 0.05).Movements of the knee and ankle joints are an integrative part in the skillful use of the DP technique, and restriction of the motion in these joints markedly affects both biomechanical and physiological variables, impairing DP performance.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Health Sciences (hsv//eng)
NATURVETENSKAP -- Biologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences (hsv//eng)
NATURVETENSKAP -- Annan naturvetenskap (hsv//swe)
NATURAL SCIENCES -- Other Natural Sciences (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)

Nyckelord

Adult
Ankle Joint
physiology
Biomechanical Phenomena
Ergometry
Female
Humans
Knee Joint
physiology
Leg
physiology
Male
Muscle Contraction
physiology
Muscle
Skeletal
physiology
Oxygen Consumption
Posture
Skiing
physiology
Cross country skiing
Sports

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Av författaren/redakt...: Holmberg, Hans-C ...; Lindinger, Stefa ...; Stöggl, Thomas; Björklund, Glenn; Müller, Erich

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Av lärosätet: Göteborgs universitet; Mittuniversitetet; Luleå tekniska universitet; Karolinska Institutet

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