抄録
It is well known that factors such as muscle strength, anaerobic power, aerobic and anaerobic capacities, coordination, agility, balance, and flexibility play an important role in performance during alpine skiing races. Recently, it can provide a proposal for effective utilization of genetic information to improve physical training. The purpose of the study was to investigate the ACE and ACTN3 genotypes with physical fitness and skiing performance（ FIS points） in Japanese alpine ski racers. Eighteen collegiate ski racers（ age; 19.7±1.1 yrs, height; 171.5±4.2 cm, Body weight; 70.2±5.3 kg, male） participated in this study. Subjects ware three in DD, seven in DI and eight II in ACE genotype each. In ACNT3 genotype, subjects were four in RR, seven in RX and seven in XX on alpine ski racers. Body weight and muscle mass in ACTN3/RX were heavier than those in RR. The peak torque of knee flexion（ left at 60deg/sec） in ACTN3/XX was significantly higher than that in RR. The peak torque of knee extension （right at 180deg/sec） in ACTN3/RX was significantly higher than that in RR. The peak torque of knee flexion（ left at 180deg/sec） in ACE/II was significantly higher than that in DD. There were no significantly differences in parameters of physical fitness （VO2max, anaerobic power, standing jump, grip and back strength, agility and flexibility） and ski racing performance on ACE and ACTN3 genotypes, respectively. Significantly difference was not found among the three groups in ACE and ACTN3. These results suggest that it was unclear the differences in ACE and ACTN3 genotypes with physical fitness and ski racing performance（ FIS points） in collegiate elite alpine ski racer.
