关键词: 1 500m跑, 步长, 步频, 血乳酸, 最大摄氧量速度

Abstract: Purpose: The paper is to investigate the influencing factors of 1500-m running by testing kinematics parameter, aerobic and anaerobic capacity and explore establishing the assessment methods of the special ability of 1500-m running. Method: 14 Grade 2 athletes participating in simulated 1500-m running are tested for their omnidistance, start and intermediate run, incremental load, 300-m run and constant load. Their performances, stride length, stride frequency, blood lactate, heart rate, speed associated with VO₂max are recorded. According to their individual speed, they are divided into fast (average speed over 5m/s) and slow (average speed below 5m/s) with each group consisting of 7 members. Other indexes are compared and analyzed in terms of their correlation. Results: the fast group indicates significant decrease in blood lactate under constant load compared with the slow group (P<0.05). The fast group is obviously higher than the slow group in maximum oxygen uptake speed and stride frequency(P<0.05). The analysis indicates significant correlation between VO₂max and sports performance(r=-0.756, P<0.01). Conclusion: (1) VO₂max can be used to evaluate 1500-m runners’ aerobic endurance. (2) Blood lactate after 70s sub-maximal constant load can be used to evaluate of 1500-m runners’ anaerobic endurance. (3) Stride frequency is an important indicator to evaluate technique capability of 1500-m runners.

Key words: 1500-m running, stride length, stride frequency, blood lactate, vVO₂max