Relationship between cardiovascular drift and performance in marathon running
Taiikugaku kenkyu (Japan Journal of Physical Education Health and Sport Sciences)
フルマラソンレースにおける Cardiovascular drift と パフォーマンスとの関係 1) 学校法人名古屋学院名古屋中学校・高等学校 〒 461-8676 愛知県名古屋市東区砂田橋 2-1-58 2) 筑波大学体育系 〒 305-8574 茨城県つくば市天王台 1-1-1 3) 日本学術振興会特別研究員 〒 102-0083 東京都千代田区麹町 5-3-1 4) 国立スポーツ科学センター スポーツ研究部 〒 115-0056 東京都北区西が丘 3-15-1 Abstract: Heart rate (HR) monitoring, which reflects exercise intensity and environmental factors, is often used for pacing strategies in the marathon race. However, it is difficult to obtain appropriate feedback for only the HR value since cardiovascular drift
... rdiovascular drift (CV drift) occurs during prolonged exercise. Recently, cardiac cost (CC: HR divided by running velocity) has been shown to be a potential index for evaluation of CV drift during the marathon race. The aim of this study was to clarify the relationship between CV drift and performance in the marathon race. Fourteen male university student runners participated. They carried out incremental tests on a treadmill and took part in an actual marathon race. CV drift was evaluated from differences between CC in the 0-5-km section and over every 5-km section (ΔCC). The marathon performance was examined from two viewpoints: absolute performance (average running velocity during the race: V mar ), and relative performance (V mar against velocity corresponding to ventilatory threshold: vVT achv.). Significant correlations were found between ΔCC and vVT achv. in the 25-30 km, 30-35 km and 35-40 km sections (r = −0.672, −0.671 and −0.661, respectively), suggesting that excessive CV drift had a negative impact on relative performance. We can therefore conclude that suppression of CV drift after 25 km is an important factor for improvement of relative performance.