To estimate the total outer power (Pto) of racing skiers when they go skiing is of primary importance as it enables to study principles of metabolic energy transformation into speed, therefore, to study its effectiveness.
In our research we compared Pto indicators covering energy provision for skiing over flat ground with simultaneous strideless and simultaneous one-step classic gluiding and simultaneous one- step and simultaneous two- step uphill freestyle gliding. Data from 10 racing skiers was used in the research.
Energy provision indicators of Mechanical Power of cross-country skiers in classic and skate skiing
|
Style |
Classic Skiing |
Skate Skiing |
||
|
Gliding types |
simultaneous stepless (SS) |
simultaneous one-step (SOS1) |
simultaneous one-step (SOS2) |
simultaneous two-step uphill (STU) |
|
M ± m |
413,27 ± 30,42 |
461,66 ± 88,22 |
704,04 ± 69,66 |
480,90 ± 123,12 |
In classic simultaneous stepless skiing the least number of muscles are used: arm muscles, shoulder and upper body muscles, so Pto indicators are minimal. In simultaneous one-step skiing (Classic Skiing) and simultaneous two-step uphill (Freestyle Skiing) pushing with one leg is involved too, so Pto is higher than in simultaneous stepless skiing. We explain high Pto indicators in simultaneous one-step skiing by active work of all muscle groups and by higher frequency of moves possible.
Thus, we see that indicators of mechanical power are different and depend on the number of involved muscle groups. Judging by subjective observations, we can say that the described gliding types are ranked differently in speed. First comes skate simultaneous one-step skiing, then classic simultaneous stepless skiing, then the other two. It is obvious that metabolic energy is transformed differently in each type. The following research will enable us to identify the pattern and to provide recommendations for training programmes and competitions.
The article is written with the support of Russian State Humanities Fund, project № 11-36-00312а2.
The work is submitted to International Scientific Conference «Fundamental research», Israel (Tel Aviv), October, 16-23, 2012, came to the editorial office on 14.11.2012.