RELATIONSHIP BETWEEN THE ABILITY TO MAINTAIN JOINT TORQUE AND MUSCULAR ENDURANCE OF LOWER LIMBS DURING 400m RUNNING.
- VernacularTitle:４００ｍ走中の下肢関節トルク持続能力と下肢の筋持久性との関係
- Author:
MITSUGI OGATA
;
YOSHIAKI MANABE
;
MEGUMI TAKAMOTO
;
KIYONOBU KIGOSHI
- Publication Type:Journal Article
- Keywords:
400m running;
decrease in running velocity;
joint torque;
muscular endurance
- From:Japanese Journal of Physical Fitness and Sports Medicine
2003;52(4):455-463
- CountryJapan
- Language:Japanese
-
Abstract:
A study was conducted to investigate the relationships among changes of joint torque of the lower limbs, sprint ability such as sprint speed, stride length and stride frequency in 400 m running, and muscular endurance of the lower limbs. Subjects were 11 male track and field athletes who had a 400m running time of 48.75±1.32s. The experiment was composed of videotaping sprint form at 160 m and 360 m points during 400 m running, and measuring muscular endurance of hip and knee flexion and extension using Cybex NormTM.
The main results were as follows:
1) There was a significant relationship between 400 m running time and ability to maintain a higher running speed at the 360 m point.
2) Running speed, stride length and stride frequency decreased significantly at the 360 m point.
3) Subjects who showed a smaller decrease in stride frequency at the 360 m could maintain higher running speed.
4) Subjects who showed smaller decrease in maximal joint torque of the lower limbs at the 360 m could maintain a higher running speed.
5) There was a significant relationship between an increase in support time and decrease in maximal joint torque of hip extension for the recovery leg.
6) Ability to maintain joint torque during 400 m running was influenced by muscular endurance of the lower limbs.
These results suggest that the ability to maintain torque needed for higher performance in 400 m running is influenced by muscular endurance of the lower limbs.
