Producing comparable/greater ground reaction forces (GRFs) at faster running speeds is beneficial for sprint performance, and assisted sprint training is used to induce faster running speed conditions. This study aimed to demonstrate the characteristics of assisted sprinting at the maximal speed phase and investigate acute differences to control sprinting. Fifteen sprinters completed control and assisted (5 kg) sprints over force platforms. Assisted sprinting increased running speed (9.3% mean difference), while propulsive mean force (−4.3%) and impulse (−12.4%) decreased, suggesting that running speed improvements were caused primarily by assisted pulling force rather than improvements in anteroposterior force production of athletes. In addition, vertical mean force increased (4.2%), probably due to braking mean force (34.2%) and impulse (32.5%) increases. Magnitude of control trial maximum speed was achieved earlier (during acceleration) in assisted trials, and net anteroposterior (includes both braking and propulsive components) mean force (67.2%) and impulse (67.9%) increased at this matched speed, suggesting that assisted sprints could be used to practice producing greater GRFs at comparable speeds. Running speed improvement by pulling force was associated with contact time decreases (r = -.565), suggesting that shortening contact time may be important for effective assisted sprinting.

Sam Gleadhill

Pedro Jiménez-Reyes

Roland van den Tillaar

Ryu Nagahara

Journal of Sports Sciences

《体育科学杂志》在发表高标准文章方面享有国际声誉，并被 MEDLINE 和 CLARIVATE ANALYTICS 列入名单。它发表关于运动和运动科学各个方面的研究，包括解剖学、生物化学、生物力学、性能分析、生理学、心理学、运动医学和健康，以及教练和人才识别、人体测量学等跨学科视角。期刊是关于人文科学的，广泛定义并应用于运动和锻炼。除了人类对运动反应的实验工作外，涵盖的主题将包括人类对技术的反应，例如运动器材和运动设施的设计、训练、选择、性能预测或修改、压力减轻或表现等方面的研究。考虑出版的手稿包括那些涉及运动的原始调查、体育技术创新的验证或与体育科学研究相关的主题的综合评论。

The Journal of Sports Sciences is an internationally renowned journal known for publishing high-quality research articles and is indexed by MEDLINE and CLARIVATE ANALYTICS. It covers various aspects of sports and exercise science, including anatomy, biochemistry, biomechanics, performance analysis, physiology, psychology, sports medicine, and health, while also addressing interdisciplinary perspectives such as coaching, talent identification, and anthropometry. The journal's themes are broad, encompassing the application of humanities in sports and exercise. In addition to experimental work on human responses to exercise, it also focuses on human responses to technology, such as the design, training, selection, performance prediction, or modification of sports equipment and facilities, as well as stress reduction and performance enhancement. Manuscripts considered for publication include original investigations related to sports, validations of sports technology innovations, and comprehensive reviews on topics relevant to sports science research.

《Journal of Sports Sciences》是一份享有国际声誉的期刊，以发表高标准的研究文章而闻名，并被MEDLINE和CLARIVATE ANALYTICS收录。该期刊涵盖运动和运动科学的各个方面，包括解剖学、生物化学、生物力学、性能分析、生理学、心理学、运动医学和健康等领域，同时也关注教练和人才识别、人体测量学等跨学科的视角。期刊的主题广泛，涉及人文科学在运动和锻炼中的应用。除了人类对运动反应的实验研究外，期刊还关注人类对技术的反应，例如运动器材和设施的设计、训练、选择、性能预测或改进、压力减轻和表现等方面的研究。考虑出版的手稿包括与运动相关的原始调查、体育技术创新的验证以及与体育科学研究相关的综合评论。

Category	Quartile
医学	2
医学, 运动科学	3

Comparison of kinematics and kinetics between unassisted and assisted maximum speed sprinting

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Journal Info

Category	Quartile
SPORT SCIENCES	2