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Guasha improves the rating of perceived exertion scale score and reduces heart rate variability in male weightlifters:a randomized controlled trial

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Journal of Traditional Chinese Medicine 2017年第1期37卷 49-56页

作者： Wang Xingze Chen Peijie Huang Xingyu Wang Yingying Yang Jinsheng Wichai Eungpinichpong Yang Yuming Uraiwan Chatchawan Research Center on Physical Education and Health Education in Gannan Normal University Ganzhou 341000China School of Kinesiology Shanghai University of SportShanghai 200438China Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing 100700China Research Center in Back NeckOther Joint Pain and Human PerformanceKhon Kaen UniversityKhon Kaen 40002Thailand

OBJECTIVE: To evaluate the effects of Guasha therapy on the rating of perceived exertion(RPE) scale score, and heart rate variability(HRV).METHODS: A randomized controlled trial of Guasha(skin scraping) was compared with a sham scraping group and control group. Sixteen sessions within an 8-week period were completed. Sixty-five male weightlifters who had undergone normal weightlifting training for a mean of 5 years before study commencement were recruited. The RPEscale score of "snatch", "clean and jerk" maneuvers(85% of one-repetition maximum), and HRV were measured before and after the ***: The RPE scale score for snatch, clean and jerk were reduced significantly after intervention in the Guasha group and sham group. However, there was a significant difference in the low frequency(LF) domain and LF/high frequency(HF) ratio(P <0.05): the LF domain decreased, and the LF/HF ratio ***: Guasha could be used to reduce the RPE scale score, and increase the response to *** could be considered as an alternative to some types of recovery from sports training.

关键词： Scraping therapy Heart rate rating of perceived exertion Weightlifting training Randomized controlled trial

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Assessment of the Anaerobic Speed Reserve during Specific High-Intensity Exercise in Judo Athletes

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Journal of Science in Sport and Exercise 2022年第3期4卷 266-274页

作者： Emerson Franchini Rafael Lima Kons Valéria Leme Gonçalves Panissa Daniele Detanico Martial Arts and Combat Sports Research Group School of Physical Education and SportUniversity of São PauloSão PauloBrazil Biomechanics Laboratory Center of SportsFederal University of Santa CatarinaFlorianópolisSC 88040-900Brazil

Purpose This study aimed to describe self-selected intensity and its relationship to performance during a high-intensity all-out judo protocol,and to verify whether athletes with different anaerobic speed reserve(ASR)perform differently during a high-intensity all-out interval uchi-komi(judo-specific skill).Methods We analyzed the performance of 28 judo athletes as a whole group and divided into groups,according to their *** performed several judo-specific protocols using a specific skill:maximal speed sprint(MSS)and maximal aerobic speed(MAS),and high-intensity intermittent uchi-komi protocol(12×20 s all-out:10 s passive recovery).Results The main results demonstrated a decrease in the number of repetitions and an increase in heart rate across the *** with greater ASR performed a higher number of repetitions,compared to the low ASR group,and they were able to exercise at a higher percentage of the MAS(low ASR=126%;SD=13%;high ASR=152%,SD=l9%)and at a lower percentage of MSS compared to the low ASR group(low ASR=84%,SD=7%;high ASR=76%,SD=11%).However,both groups exercised at a similar percentage of their own ASR during the protocol(low ASR=50%,SD=20%;high ASR=53%,SD=19%).Conclusions Athletes with different ASR seem to set their pace at around 50%of their ASR within an all-out uchi-komi ***,the ASR is useful for predicting performance during high-intensity judo-specific interval exercise intervals.

关键词： Combat sports rating of perceived exertion Pace All-out exercise

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Development of electric cart for improving walking ability — application of control theory to assistive technology

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Science China(Information Sciences) 2017年第12期60卷 262-270页

作者： Jinhua SHE Yasuhiro OHYAMA Min WU Hiroshi HASHIMOTO School of Engineering Tokyo University of Technology School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Master Program of Innovation for Design & Engineering Advanced Institute of Industrial Technology

This paper explains the development of an electric cart that helps the elderly maintain or improve their physical strength. Unlike commercially available ones, it has a pedal unit that provides some exercise for a user in training his lower limbs. An impedance model describes the feeling of pushing the pedals. The largest pedal load is determined based on a pedaling experiment. An H∞ controller is designed for each of the largest pedal load and virtually no load. A control law, which is based on the concept of dynamic parallel distributed compensation, is designed using the rating of perceived exertion of a driver as a criterion to choose a pedal load between the largest and almost zero. Five university students and twelve elderly people participated experiments to verify the system design and the validity of the system.

关键词： aging Borg’s scale dynamic parallel distributed compensation electrical cart H_∞ control Karvonen formula lower limbs pedaling rating of perceived exertion

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