Effect of the Slapskate on Physiological Variables and Athletic Performance in Speed-skating
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.20 Vol.20】
Recently designed ice skate "the Slapskate" should allow one to slap an extra plantar flexion at the end of the push-off, then appeared to improve skating performance. The purpose of this study was to compare 1) the physiological variables and 2) muscle deoxygenation by near infrared spectroscopy (NIRS) during 1500 m skating-test between conventional skaters (CS) and slapskaters (SS) and 3) to elucidate the effect of the Slapskate on athletic performance in speed-skating. Two groups of matched junior speed skater ; CS and SS were compared while skating on a 400 m rink at submaximal and maximal intensities. The following results were obtained ;
1) All physiological variables (oxygen uptake, heart rate and blood lactate) were lower in SS than CS (NS) and this might led improved endurance capability (skating velocity at 6 mM blood lactate ; V@6 mM HLa) in SS.
2) Deoxygenation of m. vastus lateralis during 1500 m skating-test were slightly higher (NS) in SS as compared to those in CS, but showed almost constant values in spite of increasing skating velocities both in SS and CS.
3) The patterns of muscle deoxygenation of m. gluteus maximus at maximal intensity might reflect an incresed oxgen utilization rather than oxygen delivery, which in turn might suggest the importance of the power output of hip joint for accelerating the skating velocity in SS.
4) Similarity of the muscle deoxygenation of lower extremity in SS to the Slaproller (SR) and the Slide board (SB) could be an indication of the usefullness of SR and SB during dryland training.
5) Significant correlation was only noted between peak blood lactate measured after timetrial and mean velocity in sprinting event (500 m). On the other hand, there were significant correlations between skating velocities at 10 mM blood lactate (V@vLac) and performances in 1500 m and 3000 m.
These results might suggest the importance of specificity of exercise modality and energy delivery system during training for improving athletic performance in SS. Furthermore, more detailed research should be done to know about not only the physilogical but also the biomechanical characteristics of SS, and whether the SS would add a new dimension to the art of speed-skating.
DESCENTE SPORTS SCIENCE Vol.20/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
1) All physiological variables (oxygen uptake, heart rate and blood lactate) were lower in SS than CS (NS) and this might led improved endurance capability (skating velocity at 6 mM blood lactate ; V@6 mM HLa) in SS.
2) Deoxygenation of m. vastus lateralis during 1500 m skating-test were slightly higher (NS) in SS as compared to those in CS, but showed almost constant values in spite of increasing skating velocities both in SS and CS.
3) The patterns of muscle deoxygenation of m. gluteus maximus at maximal intensity might reflect an incresed oxgen utilization rather than oxygen delivery, which in turn might suggest the importance of the power output of hip joint for accelerating the skating velocity in SS.
4) Similarity of the muscle deoxygenation of lower extremity in SS to the Slaproller (SR) and the Slide board (SB) could be an indication of the usefullness of SR and SB during dryland training.
5) Significant correlation was only noted between peak blood lactate measured after timetrial and mean velocity in sprinting event (500 m). On the other hand, there were significant correlations between skating velocities at 10 mM blood lactate (V@vLac) and performances in 1500 m and 3000 m.
These results might suggest the importance of specificity of exercise modality and energy delivery system during training for improving athletic performance in SS. Furthermore, more detailed research should be done to know about not only the physilogical but also the biomechanical characteristics of SS, and whether the SS would add a new dimension to the art of speed-skating.
DESCENTE SPORTS SCIENCE Vol.20/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Isamu Nemoto*1, Natsumi Nakamura*1, Yoshio Kuroda*1, Teruo Kumagawa*2, Teruichi Shimomitsu*3 |
|---|---|
| University or institution | *1 Japan Women's College of Physical Education, *2 Tsumagoi High School, *3 Department of Preventive Medicine and Public Health, Tokyo Medical College |
Keywords
ice skate, Slapskate, physiological variables, muscle deoxygenation, muscle deoxygenation