| Research purpose: With the rapid development of skateboarding and China’s strategic goal of preparing for the Olympics,it is necessary to improve the level of scientific training and grasp the winning rules of street skateboarding events.Therefore,this article takes the physical fitness of excellent female street skateboarders as the research object.Based on sufficient research,it analyzes the physical characteristics of excellent female street skateboarders,establishes an evaluation system for the physical fitness of excellent female street skateboarders,and provides a certain theoretical reference for monitoring and evaluating the physical fitness training of excellent female street skateboarders in the future.Research methods: This paper adopts a variety of methods,including literature review,expert interviews,Delphi method,testing method and mathematical statistics method.Through the preliminary screening of physical indicators,the Delphi method and mathematical statistics method are used to further screen,and the weight coefficient of the indicators is calculated using the principal component analysis,to build the physical evaluation index system of excellent female street skaters.On this basis,a physical fitness evaluation standard was established using the percentile method.Research results:(1)After preliminary selection of indicators and two rounds of expert selection,three primary indicators(body shape,body function,and athletic fitness)were obtained,and ten secondary indicators(length,fullness,anaerobic ability,aerobic ability,explosive power,maximum strength,speed,endurance,sensitive coordination,and balance)were obtained,Ten three-level indicators(Achilles tendon length,body fat rate,maximum anaerobic power,maximum oxygen uptake,Ollie height,1RM squat,30 m run,1-minute box jump test,1-minute rope jump,and roller balance board).(2)In the physical fitness evaluation index system of excellent female street skateboarders,the weights of the first level indicators are 0.24 for body shape,0.32 for body function,and 0.44 for athletic fitness.The weights of the third level indicators are Achilles tendon length 0.43,body fat rate 0.57,maximum anaerobic power 0.72,maximum oxygen uptake 0.28,Ollie height 0.23,1RM deep squat 0.23,30 m run 0.11,1 minute box jumping test 0.13,1 minute rope jumping 0.12,and roller balance board0.18.(3)The percentile method was used to develop the evaluation criteria for the physical fitness level of excellent female street skateboarders,dividing the athletes’ physical fitness level into five levels: upper,middle upper,medium,middle lower,and lower.The comprehensive scores are divided according to the following standards:lower grade<8.48,middle and lower grade 8.48～<10.73,medium grade 10.73～15.23,middle and upper grade>15.23～17.48,and upper grade>17.48.A corresponding comprehensive physical fitness level evaluation table for female street skateboarders has been developed,which can help coaches scientifically diagnose and evaluate the future physical fitness development level of female street skateboarders.Research conclusion:(1)The body shape of excellent female street skateboarders mainly shows moderate body shape,even weight,relatively long lower limbs,long Achilles tendons,wide thigh circumference,low body fat rate and narrow pelvis.In terms of physiological function,the main performance is to have strong anaerobic metabolic ability and body recovery ability.In terms of sports quality,the main performance is to have better lower limb strength and explosive power,excellent balance ability,and good agility and coordination ability.(2)This paper establishes an evaluation system of physical performance of excellent female street skateboarders,which contains three parts: evaluation indexes,index weights and evaluation criteria.The evaluation indexes are divided into three primary indicators of morphology,function and quality,including ten secondary indicators and ten tertiary indicators.Among them,sports quality has the greatest weight,followed by physiological function and physical form.For each evaluation index,this paper establishes scoring evaluation criteria and grade evaluation criteria.(3)In the physical fitness evaluation system constructed in this paper,specific diagnosis and analysis can be provided for the strengths and weaknesses of individual athletes in terms of physical fitness development. |
