Original scientific paper

Differences in force pressure distribution during a ski and inline skating turn

Vjekoslav Cigrovski ; Sveučilište u Zagrebu, Kineziološki fakultet

Abstract

Short parallel turns on in-line skates are performed in the same order of body movements as during alpine skiing. Therefore, in-line skating is often used by competitors in alpine skiing as an alternative sport during preparation season for alpine skiing. Most of the competitors first learn the basics of skiing and then use in-line skating as a means for out of season training. From the aspect of ski beginners, it is important to determine force pressure differences during performance of short parallel turns on skies and in-line skates.
Five participants were enrolled in the present study. They were all top-level alpine skiers who performed short parallel turns on skies and in-line skates in the previously defined corridors. They used Novel insoles for objective determination of force pressure under both left and right foot and under different parts of foot during in-line skating and skiing. Analysed were overall 70 skiing and 70 in-line skating turns.
Measured force on outer foot during left turn on in-line skates is significantly lower than in the same turn on skies (584,82 N vs 764,79 N), and the same pressure pattern was seen for outer leg in right turn (564,44 N vs 811,37 N). Significantly higher pressure was seen on inner leg compared to outer while in-line skating and in both left and right turn (left turn-720,26 N vs 378,45 N; right turn-745,23 N vs 412,83 N). Moreover, results suggest the time delay in achieving maximal pressure on inner foot during in-line skating compared to outer foot. In addition, pressure over medial part of outer leg during skiing is significantly higher compared to that seen while in-line skating (left turn-53,54 N vs 159,64 N; right turn-65,33 N vs 161,33 N).
Determined differences in the pressure distribution between turns performed on in-line skates and skies most probably come out of different terrains and friction forces which results in different speeds of turns. Although turns on in-line skates and skies differ in the characteristics of equipment and terrain (steepness and surface) and therefore
produce different friction forces and speed, knowledge of in-line skating ameliorates learning of alpine skiing.

Keywords

alpine skiing, in line skating, kinetic analysis, pressure insoles

Hrčak ID:

263079

URI

https://hrcak.srce.hr/263079

Publication date:

30.7.2021.

Article data in other languages: croatian

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