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- Andersson, Erik P., 1984-, et al.
(author)
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Physiological responses and cycle characteristics during double-poling versus diagonal-stride roller-skiing in junior cross-country skiers
- 2021
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In: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 121:8, s. 2229-2241
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Journal article (peer-reviewed)abstract
- Purpose: This study aimed to compare physiological factors and cycle characteristics during cross-country (XC) roller-skiing at matched inclines and speeds using the double-poling (DP) and diagonal-stride (DS) sub-techniques in junior female and male XC skiers. Methods: Twenty-three well-trained junior XC skiers (11 women, 12 men; age 18.2 ± 1.2 yr.) completed two treadmill roller-skiing tests in a randomized order using either DP or DS. The exercise protocols were identical and included a 5 min warm-up, 4 × 5 min submaximal stages, and an incremental test to exhaustion, all performed at a 5° incline. Results: No significant three-way interactions were observed between sex, submaximal exercise intensity, and sub-technique. For the pooled sample, higher values were observed for DP versus DS during submaximal exercise for the mean oxygen uptake kinetics response time (33%), energy cost (18%), heart rate (HR) (9%), blood lactate concentration (5.1 versus 2.1 mmol·L−1), rating of perceived exertion (12%), and cycle rate (25%), while cycle length was lower (19%) (all P < 0.001). During the time-to-exhaustion (TTE) test, peak oxygen uptake (V˙ O2peak), peak HR, and peak oxygen pulse were 8%, 2%, and 6% lower, respectively, for DP than DS, with a 29% shorter TTE during DP (pooled data, all P < 0.001). Conclusion: In well-trained junior XC skiers, DP was found to exert a greater physiological load than DS during uphill XC roller-skiing at submaximal intensities. During the TTE test, both female and male athletes were able to ski for longer and reached markedly higher V˙ O2peak values when using DS compared to DP.
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| 2. |
- Hämberg, Irina, et al.
(author)
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Physiological responses and cycle characteristics during double-poling versus diagonal-stride roller-skiing in junior cross-country skiers
- 2020
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Conference paper (peer-reviewed)abstract
- Purpose: This study aimed to compare physiological factors and cycle characteristics during cross-country (XC) roller-skiing at matched inclines and speeds using the double-poling (DP) and diagonal-stride (DS) sub-techniques in male and female XC skiers.Methods: Following familiarization to treadmill roller-skiing, 23 well-trained junior XC skiers (12 males, 11 females; age 18.2 ± 1.2 y) completed two roller-ski tests in a randomized order using either DP or DS. The exercise protocols were identical and included a 5-min warm-up, 4 x 5-min submaximal stages and an incremental test to exhaustion all performed at a 5° incline.Results: Submaximal energy cost, mean O2 kinetics response time, blood lactate concentration, heart rate (HR), rating of perceived exertion and cycle rate were all significantly lower during DS compared to DP, while cycle length was significantly higher (all P<0.001). In addition, O2peak and peak HR were higher and time to exhaustion was longer during DS compared to DP (all P<0.001).Conclusion: In well-trained junior XC skiers, DP was found to exert a greater physiological load than DS during uphill XC roller-skiing at submaximal intensities. Moreover, athletes were able to ski for longer and reached markedly higher O2peak and HR values during incremental exercise to exhaustion when using DS compared to DP.Practical application: It is important to consider the specific demands of DS and DP when planning and implementing training programs and sessions, as these two sub-techniques elicit distinct responses among junior XC skiers.
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