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00005768-200705001-0239700005768_2007_39_s399_ren_relationships_5miscellaneous< 15_0_1_0 >Medicine & Science in Sports & Exercise© 2007 American College of Sports MedicineVolume 39(5) SupplementMay 2007p S399–S400Relationships between Aerobic Capacity and Special Physical Fitness in Youth Soccer Players: 2216: Board #129 June 1 9:00 AM ‐ 10:30 AM[E-27 Free Communication/Poster - Pediatric Exercise Physiology: JUNE 1,2007 7:30 AM - 12:30 PM ROOM: Hall E]Ren, Jiansheng; Chen, Qian-ni; Chen, Ning1 Wuhan Institute of Physical Education, Wuhan, Hubei, China.2Georgia State University, Atlanta, GA. Email: rjs1710@hotmail.com (Sponsor: Yong Wang, FACSM)PURPOSE: To investigate effective factors of soccer special fitness, characteristics of metabolism for scientific training of elite youth soccer players.METHODS: Soccer special fitness parameters, maximal velocity (Vm) and average velocity (Va) with designated exercise load, final average velocity (Vf), and total sprint numbers (N) were determined in 30-meter repeated sprints. A special fitness index (SFI) was calculated (SFI = N/Vf). Compared general aerobic capacity parameters, maximal oxygen uptake (), maximal oxygen uptake in unit weight mass (/kg), maximal exhaust (VEmax), oxygen pulse (O2pulse), anaerobic threshold (AT) and oxygen equivalent (EQO2), the relationships between SFI and general aerobic capacity were analyzed through correlation test.RESULTS: The comprehensive analysis indicates: (1) 30-meter repeated sprints is a novel method to evaluate soccer special fitness because SFI is correlated with /kg, AT and EQO2 (r = 0.566, 0.448, 0.546 and 0.594, P < 0.01) and significantly correlated with O2pulse (r = 0.863, P < 0.001); (2) SFI reflects the ATP-phosphocreatine energy supply because SFI is correlated with Vm and Va (r = 0.808 and 0.34, P < 0.001 and P < 0.05); (3) glycolysis is not an important pathway for soccer specific fitness due to without obvious correlations between SFI and hemolactate at designated load and fatigue status (r = 0.005); (4) general aerobic capacity can not substitute specific aerobic capacity because of lower correlation coefficients between and SFI (r = 0.566) than COOPER 12-mintue running and PALIER method (r = 0.90 and 0.94).CONCLUSIONS: The 30-meter repeated sprints are a novel and practical method for soccer special fitness evaluation to guide scientific selection and specific fitness training, and investigate special aerobic capacity theories in elite soccer players.Relationships between Aerobic Capacity and Special Physical Fitness in Youth Soccer Players: 2216: Board #129 June 1 9:00 AM ‐ 10:30 AMRen, Jiansheng; Chen, Qian-ni; Chen, NingE-27 Free Communication/Poster - Pediatric Exercise Physiology: JUNE 1,2007 7:30 AM - 12:30 PM ROOM: Hall E539
00005768-200705001-0239700005768_2007_39_s399_ren_relationships_5miscellaneous< 15_0_1_0 >Medicine & Science in Sports & Exercise© 2007 American College of Sports MedicineVolume 39(5) SupplementMay 2007p S399–S400Relationships between Aerobic Capacity and Special Physical Fitness in Youth Soccer Players: 2216: Board #129 June 1 9:00 AM ‐ 10:30 AM[E-27 Free Communication/Poster - Pediatric Exercise Physiology: JUNE 1,2007 7:30 AM - 12:30 PM ROOM: Hall E]Ren, Jiansheng; Chen, Qian-ni; Chen, Ning1 Wuhan Institute of Physical Education, Wuhan, Hubei, China.2Georgia State University, Atlanta, GA. Email: rjs1710@hotmail.com (Sponsor: Yong Wang, FACSM)PURPOSE: To investigate effective factors of soccer special fitness, characteristics of metabolism for scientific training of elite youth soccer players.METHODS: Soccer special fitness parameters, maximal velocity (Vm) and average velocity (Va) with designated exercise load, final average velocity (Vf), and total sprint numbers (N) were determined in 30-meter repeated sprints. A special fitness index (SFI) was calculated (SFI = N/Vf). Compared general aerobic capacity parameters, maximal oxygen uptake (), maximal oxygen uptake in unit weight mass (/kg), maximal exhaust (VEmax), oxygen pulse (O2pulse), anaerobic threshold (AT) and oxygen equivalent (EQO2), the relationships between SFI and general aerobic capacity were analyzed through correlation test.RESULTS: The comprehensive analysis indicates: (1) 30-meter repeated sprints is a novel method to evaluate soccer special fitness because SFI is correlated with /kg, AT and EQO2 (r = 0.566, 0.448, 0.546 and 0.594, P < 0.01) and significantly correlated with O2pulse (r = 0.863, P < 0.001); (2) SFI reflects the ATP-phosphocreatine energy supply because SFI is correlated with Vm and Va (r = 0.808 and 0.34, P < 0.001 and P < 0.05); (3) glycolysis is not an important pathway for soccer specific fitness due to without obvious correlations between SFI and hemolactate at designated load and fatigue status (r = 0.005); (4) general aerobic capacity can not substitute specific aerobic capacity because of lower correlation coefficients between and SFI (r = 0.566) than COOPER 12-mintue running and PALIER method (r = 0.90 and 0.94).CONCLUSIONS: The 30-meter repeated sprints are a novel and practical method for soccer special fitness evaluation to guide scientific selection and specific fitness training, and investigate special aerobic capacity theories in elite soccer players. Relationships between Aerobic Capacity and Special Physical Fitness in Youth Soccer Players: 2216: Board #129 June 1 9:00 AM ‐ 10:30 AM