| （Department of Physical Education，Guangzhou Sport University，Guangzhou 510500，China） Abstract: In order to explore kinetic factors that affect differences in running economy (RE) between individual runners, the authors ultimately selected 7 runners (at the age of (21.43±0.53), the height of (172.8±3.79) cm, the weight of (63.66±3.82) kg, the trained years of (4.57±0.98), and the RE of (35.65±2.58) mL• kg-1• min-1) as research subjects according to their relative values of VO2 max and performances in the 800m run, and revealed that the corre-lations between RE and force peak value, force fluctuation range and impulse were all not significant, which indi-cated that ground reaction forces in the vertical, longitudinal and transversal directions and impulse at the running support stage were not causes for differences in RE between medium distance runners, however, medium distance runners with a poor RE shown a greater impulse in the vertical direction, and differences in RE may caused by work done by lower limb muscles of the human body.
Key words: physiology；running economy；kinetics；oxygen intake |
