Author(s): MIYAZAKI, D.1, TANAKA, S.2, KUMAGAWA, D.2, OKADA, M., Institution: KOKUSHIKAN UNIVERSITY, Country: JAPAN, Abstract-ID: 1523

INTRODUCTION:
In previous studies, it has been reported that improving aerobic capacity is important for improving the athletic record in long distance athletes (1,2). Recently, running speed, as seen in world record breaking and last spurts in marathons, has been influencing victory and defeat. Therefore, it is considered that long-distance runners need not only aerobic capacity but also anaerobic capacity. The effects of anaerobic power and middle power on changes in athletic records at more marathon like distances due to long-term endurance training have not been examined. Therefore, the purpose of this study was to examine the effect of power capacity on the improvement of 20 km records in collegiate long-distance runners.
METHODS:
Twenty-two collegiate long-distance runners (age: 19.2±0.9yrs, Height: 169.8±4.8cm, Weight: 56.4±4.9kg) participated in this study. The athletic records in 5,000m, 10,000m and 20km were researched throughout pre-season (Pre) and post-season (one year after Pre). These subjects were classified by athletic record based by 20km athletic record in S2. The records of 14 subjects (HG) were improved in S2 than that of S1, while 8 subjects (LG) remained unchanged athletic record. The maximal anaerobic power (MAP), middle power (MP) and middle power to peak power ratio (MP/PP ratio) in Pre and Post as an anaerobic power generation capacity were measured by cycling ergometer (Power max VII), respectively. The change ratio of measurement parameters was calculated in all subjects.
RESULTS:
As a results, the S2 athletic record of 5000m, 10000m and 20km in all subjects were improved than that of S1 by endurance training during 1 year. There was no significant difference of MAP in AG between S1 and S2. On the other hand, BG showed a significantly lower value in S2 than that of S1. The change ratio in S2 relative to S1 of MAP in AG was 99.3 ± 5.3%, and BG was 89.4 ± 8.9%. Change ratio of MP and MP/PP showed no significant differences between the two groups. And, the change ratio of MAP was observed related to the change ratio of 20km record.
CONCLUSION:
These results indicates that one year of endurance training significantly improved 5000m, 10,000m, and 20km athletic records in collegiate long-distance runners. In addition, AG who improved their 20km athletic record showed maintenance of MAP, MP, and MP/PP. However, BG who did not improve their 20km athletic record showed a significant decrease in MAP, although MP and MP/PP were maintained after one year of endurance training. From these results, it was suggested that not only the improvement of endurance power generation capacity but also training to maintain MAP is important to improve the 20km athletic record.
REFERENCES:
1. Taunton et al. (1981) 2. Dotan et al. (1983)