Sports Games and amusements 3 Development of science and technologies 2 Exercise 2 Humans 2 Physical activity 2 Physical education and training. Physical fitness 2 Sport video 2 Video image 2 boxing 2 human 2 sport 2 Action recognition 1 Adult 1 Application process 1 Article 1 Attention 1 Ball games: Baseball, football, golf, etc 1 Basketball games 1 Big data 1 Biofeedback, Psychology 1 Boxing 1 Brain neurons 1 Caffeine 1 Clustering algorithms 1 Combat trainers 1 Comprehensive test systems 1 Computer methods 1 Convolutional neural network 1 Convolutional neural networks 1