Le Parkour is a sport where the athletes transpose common day-to-day obstacles in the best possible way. This sport demands elements like strength, focus and decision making;elements supposedly affected by energy drin...Le Parkour is a sport where the athletes transpose common day-to-day obstacles in the best possible way. This sport demands elements like strength, focus and decision making;elements supposedly affected by energy drinks, with performance improvement. The aim of this study was to investigate the effects of energy drink ingestion on Le Parkour athlete’s performance. Twelve male amateur athletes, mean age of 23.5 ± 2.74, took part in this randomized, double-blind, placebocontrolled study. Subjects were randomly assigned to drink: 250 ml of energy drink, 500 ml of energy drink or placebo. Forty minutes after the beverage consumption, they were evaluated in a specific circuit performance test (time to complete the circuit) followed by a perceived exertion and a circuit technical difficulty evaluation. We also evaluated heart rate in 3 different moments: rest, pre-circuit and post-circuit. All variables were collected in 3 different experimental days. Time, perceived exertion and technical difficulty were higher in the first day compared to the others. Heart rate did not show a difference when we compared the days. Drinking one or two cans of an energy drink did not improve performance of Le Parkour athletes in a sport specific test. It also did not change heart rate or perceived exertion.展开更多
Retinal surgery is one of the most delicate and complex operations,which is close to or even beyond the physiological limitation of the human hand.Robots have demonstrated the ability to filter hand tremors and motion...Retinal surgery is one of the most delicate and complex operations,which is close to or even beyond the physiological limitation of the human hand.Robots have demonstrated the ability to filter hand tremors and motion scaling which has a promising output in microsurgery.Here,we present a novel soft micron accuracy robot(SMAR)for retinal surgery and achieve a more precise and safer operation.A remote center of motion(RCM)parallelogram structure with a double spring adaptive balancing mechanism is designed and optimized to achieve precise motion and safer operation.The deviation from the expected trajectory with manual operation and robot-assisted operation is 143.06μm±91.27μm vs 26.39μm±13.22μm,which has been significantly improved}.We evaluated the safety performance of SMAR in live animals.Furthermore,preliminary human clinical trials showed that the robot-assisted has less drift compared to the manual operation with 41.07μm±20.78μm vs 299.66μm±85.84μm.The visual acuity with LogMAR of cases showed higher improvement in the robot-assisted group preliminary,which for manual of 0.78±0.44 vs robot-assisted 1.24±0.70 with no statistically significant difference.This study provides promising options for robot-assisted with very experienced surgeons in the most challenging microsurgery.The system has the potential to effectively reduce the training curve of doctors and alleviate the shortage of ophthalmic surgeons,which is very important for rural areas and underdeveloped countries.展开更多
文摘Le Parkour is a sport where the athletes transpose common day-to-day obstacles in the best possible way. This sport demands elements like strength, focus and decision making;elements supposedly affected by energy drinks, with performance improvement. The aim of this study was to investigate the effects of energy drink ingestion on Le Parkour athlete’s performance. Twelve male amateur athletes, mean age of 23.5 ± 2.74, took part in this randomized, double-blind, placebocontrolled study. Subjects were randomly assigned to drink: 250 ml of energy drink, 500 ml of energy drink or placebo. Forty minutes after the beverage consumption, they were evaluated in a specific circuit performance test (time to complete the circuit) followed by a perceived exertion and a circuit technical difficulty evaluation. We also evaluated heart rate in 3 different moments: rest, pre-circuit and post-circuit. All variables were collected in 3 different experimental days. Time, perceived exertion and technical difficulty were higher in the first day compared to the others. Heart rate did not show a difference when we compared the days. Drinking one or two cans of an energy drink did not improve performance of Le Parkour athletes in a sport specific test. It also did not change heart rate or perceived exertion.
基金supported by the National Science Foundation of China(Grant No.81700884)Key Research and Development Program of Zhejiang Province(Grant No.2025C01132)+2 种基金General Research Project of Education Department of Zhejiang Province(Grant No.Y202352078)Zhejiang Province Public Welfare Technology Application(Grant No.LGF21H120005)Funding of Central Government Guiding Local Science and Technology Development(Grant No.2023ZY1061).
文摘Retinal surgery is one of the most delicate and complex operations,which is close to or even beyond the physiological limitation of the human hand.Robots have demonstrated the ability to filter hand tremors and motion scaling which has a promising output in microsurgery.Here,we present a novel soft micron accuracy robot(SMAR)for retinal surgery and achieve a more precise and safer operation.A remote center of motion(RCM)parallelogram structure with a double spring adaptive balancing mechanism is designed and optimized to achieve precise motion and safer operation.The deviation from the expected trajectory with manual operation and robot-assisted operation is 143.06μm±91.27μm vs 26.39μm±13.22μm,which has been significantly improved}.We evaluated the safety performance of SMAR in live animals.Furthermore,preliminary human clinical trials showed that the robot-assisted has less drift compared to the manual operation with 41.07μm±20.78μm vs 299.66μm±85.84μm.The visual acuity with LogMAR of cases showed higher improvement in the robot-assisted group preliminary,which for manual of 0.78±0.44 vs robot-assisted 1.24±0.70 with no statistically significant difference.This study provides promising options for robot-assisted with very experienced surgeons in the most challenging microsurgery.The system has the potential to effectively reduce the training curve of doctors and alleviate the shortage of ophthalmic surgeons,which is very important for rural areas and underdeveloped countries.
