1 Background As the basic principle of the world economy,environment,and social development,sustainable development is the focus of the international community today.In the Olympic Agenda 2020 published by the Interna...1 Background As the basic principle of the world economy,environment,and social development,sustainable development is the focus of the international community today.In the Olympic Agenda 2020 published by the International Olympic Committee(IOC),sustainable development was officially listed as one of the core concepts of the Olympic Games.Since the beginning of the bid,the concept of ctathlete-centered,sustainable and economical”was proposed,which was highly consistent with the idea of the Olympic Agenda 2020.To implement the concept of holding“green”Olympic Games and meet the sustainability requirements of the IOC,the Organizing Committee of Beijing Winter Olympic Games issued a series of documents related to the sustainability of sports venues such as Sustainability Policies for 2022 Beijing Winter Olympic Games and Winter Paralympic Games,and strived to realize the sustainable development of sports venues in the whole life cycle of planning and design stage,construction stage,operation stage,and post-game utilization.展开更多
Objective To explore the influence of the oval(plateau or plain),the lane(inner or outer),and simultaneous entry(long distance or sprint)on the result and pacing strategy in speed skating men’s 1500 m.Methods Multi-f...Objective To explore the influence of the oval(plateau or plain),the lane(inner or outer),and simultaneous entry(long distance or sprint)on the result and pacing strategy in speed skating men’s 1500 m.Methods Multi-factor analysis of variance,independent sample T test,Spearman correlation coefficient method,paired T test and other statistical methods are used to analyze the relationship and differences between the oval(plateau or plain),the lane(inner or outer),and/or simultaneous entry(long distance or sprint)and the results of the top 8 athletes of the ISU event in the 2019-2020 season.Results Among the three factors of oval,lane,and simultaneous entry,only the altitude will improve the athlete’s perfor-mance of 1500 m,an increase of about 2.52%(2.65 s).Both the oval and the simultaneous entry will affect the athlete’s 1500 m pacing strategy.Athletes tend to adopt a more positive strategy when competing in plateau;the sprint athletes have a faster opening,but a slower ending.Conclusion At present,the level of speed skating in China and the world is in the highest period.Among the oval factors,the highland oval can significantly improve the athletes’performance of 1500 m;athletes tend to adopt a more positive pacing strategy in the plateau than in the plain.In the process of preparing for the 2022 Winter Olympic Games,we can predict the competitive level of the opponent through the plateau competition results and carry out targeted preparation.Different lanes do not affect the athlete’s 1500 m performance and pacing strategy but may affect the athlete’s final lap speed.There is no obvious difference between the sprint and long-distance athletes on the performance of 1500 m,but the sprint athletes have a faster opening and a slower ending,and the long-distance athletes have a faster final lap and a smaller drop between each lap.展开更多
For spectators accustomed to human football matches,the sight of robots playing soccer is truly amusing.Ten robots,each standing 1.2 meters tall and weighing 30 kg,"gal-loped"across the green field in pursui...For spectators accustomed to human football matches,the sight of robots playing soccer is truly amusing.Ten robots,each standing 1.2 meters tall and weighing 30 kg,"gal-loped"across the green field in pursuit of glory.Though their actual movement speed fell far short of human athletes and they could even be described as somewhat clumsy and slow,they made history.This five-a-side(5v5)humanoid robot soccer match was part of the 2025 World Humanoid Robot Games.This inaugural comprehensive humanoid robot games took place from August 14 to 17 at the National Speed Skating Oval in Beijing,an iconic former Olympic Winter Games venue known as Ice Ribbon.展开更多
At the altitude,hypoxia and training load are key factors in the development of oxidative stress.Altitude-induced oxidative stress is developed due to the depletion of antioxidant potential.In the current study,we exa...At the altitude,hypoxia and training load are key factors in the development of oxidative stress.Altitude-induced oxidative stress is developed due to the depletion of antioxidant potential.In the current study,we examined the non-enzymatic antioxidant profile of blood plasma in 7 males and 5 females specializing in speed skating at a 21-day training camp at 1850m above sea level.Training included:cycling,roller skating,ice skating,strength training,and special training.At the start point and the endpoint,total hemoglobin mass(tHb-mass),hemoglobin concentration,and circulating blood volume were determined.Antioxidant profiles,hypoxic doses,hypoxic impulses,and training impulses were assessed at 3,6,10,14,and 18 days.Antioxidant profiles consisting of“urate”and“thiol”parts were registered with chemiluminometry.In the training dynamics,antioxidant parameters changed individually,but in total there was a decrease in the“urate”capacity by a factor of 1.6(p=0.001)and an increase in the“thiol”capacity by a factor of 1.8(p=0.013).The changes in“urate”capacity positively correlated(r_(S)=0.40)and the changes in“thiol”capacity negatively correlated(r_(S)=−0.45)with changes in tHb-mass.Both exercise and hypoxic factors affect the antioxidant parameters bidirectionally.They correlated with a decrease in thiol capacity and with an increase in urate capacity.The assessment of the non-enzymatic antioxidant profile can be a simple and useful addition to screening the reactive oxygen species homeostasis and can help choose the personalized training schedule,individualize recovery and ergogenic support.展开更多
文摘1 Background As the basic principle of the world economy,environment,and social development,sustainable development is the focus of the international community today.In the Olympic Agenda 2020 published by the International Olympic Committee(IOC),sustainable development was officially listed as one of the core concepts of the Olympic Games.Since the beginning of the bid,the concept of ctathlete-centered,sustainable and economical”was proposed,which was highly consistent with the idea of the Olympic Agenda 2020.To implement the concept of holding“green”Olympic Games and meet the sustainability requirements of the IOC,the Organizing Committee of Beijing Winter Olympic Games issued a series of documents related to the sustainability of sports venues such as Sustainability Policies for 2022 Beijing Winter Olympic Games and Winter Paralympic Games,and strived to realize the sustainable development of sports venues in the whole life cycle of planning and design stage,construction stage,operation stage,and post-game utilization.
基金We are thankful for the financial support provided by National Key R&D Program of China(2018YFF0300801).
文摘Objective To explore the influence of the oval(plateau or plain),the lane(inner or outer),and simultaneous entry(long distance or sprint)on the result and pacing strategy in speed skating men’s 1500 m.Methods Multi-factor analysis of variance,independent sample T test,Spearman correlation coefficient method,paired T test and other statistical methods are used to analyze the relationship and differences between the oval(plateau or plain),the lane(inner or outer),and/or simultaneous entry(long distance or sprint)and the results of the top 8 athletes of the ISU event in the 2019-2020 season.Results Among the three factors of oval,lane,and simultaneous entry,only the altitude will improve the athlete’s perfor-mance of 1500 m,an increase of about 2.52%(2.65 s).Both the oval and the simultaneous entry will affect the athlete’s 1500 m pacing strategy.Athletes tend to adopt a more positive strategy when competing in plateau;the sprint athletes have a faster opening,but a slower ending.Conclusion At present,the level of speed skating in China and the world is in the highest period.Among the oval factors,the highland oval can significantly improve the athletes’performance of 1500 m;athletes tend to adopt a more positive pacing strategy in the plateau than in the plain.In the process of preparing for the 2022 Winter Olympic Games,we can predict the competitive level of the opponent through the plateau competition results and carry out targeted preparation.Different lanes do not affect the athlete’s 1500 m performance and pacing strategy but may affect the athlete’s final lap speed.There is no obvious difference between the sprint and long-distance athletes on the performance of 1500 m,but the sprint athletes have a faster opening and a slower ending,and the long-distance athletes have a faster final lap and a smaller drop between each lap.
文摘For spectators accustomed to human football matches,the sight of robots playing soccer is truly amusing.Ten robots,each standing 1.2 meters tall and weighing 30 kg,"gal-loped"across the green field in pursuit of glory.Though their actual movement speed fell far short of human athletes and they could even be described as somewhat clumsy and slow,they made history.This five-a-side(5v5)humanoid robot soccer match was part of the 2025 World Humanoid Robot Games.This inaugural comprehensive humanoid robot games took place from August 14 to 17 at the National Speed Skating Oval in Beijing,an iconic former Olympic Winter Games venue known as Ice Ribbon.
文摘At the altitude,hypoxia and training load are key factors in the development of oxidative stress.Altitude-induced oxidative stress is developed due to the depletion of antioxidant potential.In the current study,we examined the non-enzymatic antioxidant profile of blood plasma in 7 males and 5 females specializing in speed skating at a 21-day training camp at 1850m above sea level.Training included:cycling,roller skating,ice skating,strength training,and special training.At the start point and the endpoint,total hemoglobin mass(tHb-mass),hemoglobin concentration,and circulating blood volume were determined.Antioxidant profiles,hypoxic doses,hypoxic impulses,and training impulses were assessed at 3,6,10,14,and 18 days.Antioxidant profiles consisting of“urate”and“thiol”parts were registered with chemiluminometry.In the training dynamics,antioxidant parameters changed individually,but in total there was a decrease in the“urate”capacity by a factor of 1.6(p=0.001)and an increase in the“thiol”capacity by a factor of 1.8(p=0.013).The changes in“urate”capacity positively correlated(r_(S)=0.40)and the changes in“thiol”capacity negatively correlated(r_(S)=−0.45)with changes in tHb-mass.Both exercise and hypoxic factors affect the antioxidant parameters bidirectionally.They correlated with a decrease in thiol capacity and with an increase in urate capacity.The assessment of the non-enzymatic antioxidant profile can be a simple and useful addition to screening the reactive oxygen species homeostasis and can help choose the personalized training schedule,individualize recovery and ergogenic support.
