NextRound -formerly known as Strike-f(x) is a free hanging, intelligent boxing bag that measures impact force and location of punch and kick actions. NextRound was developed in collaboration between researchers and engineers for scientific measurement, and is now commercially sold by a start-up called Sport-f(x). The NextRound won the Dutch Sports Innovation Award in 2020. … Continue reading The NextRound intelligent boxing bag
The reliability and accuracy of the Strike-f(x)
This study evaluated the test-retest reliability and accuracy of the Strike-f(x) in a training situation with experienced (kick)boxers. The Strike-f(x) is a free hanging, boxing bag that provides feedback on the impact force and location of striking actions. This study was performed using the second prototype of the Strike-f(x). It showed that measurement system has excellent reliability. … Continue reading The reliability and accuracy of the Strike-f(x)
Automatic classification of strike techniques using limb trajectory data
The classification of limb trajectory data is often cumbersome in research into combat sports. Automatic classification using machine learning techniques has the potential to greatly increase efficiency and reliability of this type of research. We applied supervised classification algorithms on a dataset obtained through a kickboxing experiment and accurately classified over 80% of the strikes. … Continue reading Automatic classification of strike techniques using limb trajectory data
Identifying movement variability within and between striking techniques in combat sports
Skilled performance requires adapting to the surroundings. In this book chapter, we address this adaptability by examining the role of movement variability in maintaining performance in combat sports, and particularly, for strikes with hands and feet. We provide research directions toward how performance optimization may be achieved by learning design that increases functional movement variability. … Continue reading Identifying movement variability within and between striking techniques in combat sports
May the best-sighted win? The relationship between visual function and performance in Para judo
In para judo, blind and partially sighted athletes compete in one class. It is questionable whether they can do so in a fair manner. Our investigation of the relationship between direct measures of visual function and the results of international competitions indicates that to minimise the impact of impairment, para judo competitions should be split into two classes. … Continue reading May the best-sighted win? The relationship between visual function and performance in Para judo
Fight without sight: The contribution of vision to judo performance
This study tested the assumption that vision does not influence judo performance, provided players start with their grip in place. Able-sighted judoka's competed in practice matches in sighted and blindfolded opponents. The findings show that vision enhances judo performance. This suggests it would be fairer when blinded and partially sighted judoka's would not compete together. … Continue reading Fight without sight: The contribution of vision to judo performance
Search behaviours support the emergence of creative actions when striking a boxing bag
This study investigates the relation between task succes, working memory and creativity in novice participants. A modified boxing glove reduced the effectiveness of left-handed strikes. Yet, they were to hit a target at the left side of a boxing bag with criterion impact. Task success depended on search behaviours and creativity, but not on working memory. … Continue reading Search behaviours support the emergence of creative actions when striking a boxing bag
Stimulating persistent exploration and creativity with augmented feedback in martial arts
This study examined how feedback about the impact force of striking and kicking actions structures a workout in elite karate athletes. It shows that feedback guides the athletes toward optimizing their strikes and kicks by inducing more persistent exploration. The study illustrates how coaches can use feedback to stimulate the occurrence of creative actions in martial arts. … Continue reading Stimulating persistent exploration and creativity with augmented feedback in martial arts
Theoretical perspective: creative action emerge from movement variability
In this position paper, we lay out our theoretical perspective about the emergence of creative motor actions in general, and on actions in combat sports in particular. Following an ecological dynamics approach, we hold that athletes do not intentionally search for a creative action, but discover them in the act, while trying to satisfy the dynamic interacting constraints. … Continue reading Theoretical perspective: creative action emerge from movement variability