臨床研究等提出・公開システム

Date of registration	Aug. 21, 2026
Last modified on	Aug. 21, 2026
Trial ID	jRCT1010260034

Scientific Title	Determination of the Optimal Load for Repeated Sprint Cycling
Public Title	Determination of the Optimal Load for Repeated Sprint Cycling

Contact for Scientific Queries	Name	Tomabechi Nobuyasu
	Affiliation	Hokkaido University of Sciences
	Address	15-4-1, Maeda 7-jo, Teine-ku, Sapporo-shi, Hokkaido
	Telephone	+81-116882391
	E-mail	tomabechi-n@hus.ac.jp
Contact for Public Queries	Name	Tomabechi Nobuyasu
	Affiliation	Hokkaido University of Sciences
	Address	15-4-1, Maeda 7-jo, Teine-ku, Sapporo-shi, Hokkaido
	Telephone	+81-116882391
	E-mail	tomabechi-n@hus.ac.jp

Recruitment status	Recruiting

Anticipated date of first enrollment		Aug. 21, 2026
Target sample size		21
Study Type		Interventional
Study Design	allocation	single arm study
	masking	open(masking not used)
	control	dose comparison control
	assignment	crossover assignment
	purpose	other
Key inclusion & exclusion criteria	Inclusion Criteria	Engages in physical exercise at least twice per week No prior experience in competitive cycling No musculoskeletal injuries that could interfere with the repeated sprint cycling performed in this study at the time of participation Agreement to refrain from resistance training involving the lower extremity muscles on the day before the experiment and to participate in the experiment without performing any exercise on the day of the experiment Agreement to maintain their usual dietary habits throughout the study period No diseases associated with difficulty in stopping bleeding once bleeding occurs No fear of needles or injections No alcohol hypersensitivity
	Exclusion Criteria	If the above criteria are not met
	Age Minimum	18age old over
	Age Maximum	No limit
	Gender	Male
Health Condition(s) or Problem(s) Studied		Participants is healthy adults.
Intervention(s)		Repeated sprint cycling (7 sets of 10-s maximal-effort pedaling with 30-s rest intervals) is performed at one of five loads: 10%, 11%, 12%, 13%, or 14% of body mass.
Primary Outcome(s)		peak power peak cadence mean power mean cadence total work volume decrement score time to reach peak power blood lactate concentration

Primary Sponsor	nobuyasu tomabechi

Secondary Sponsor

Source of Monetary Support	Japan Society for the Promotion of Science
Secondary Sponsor	Not applicable

Name of Certified Review Board	Ethics committee in Hokkaido University of Science
Address	15-4-1, Maeda 7-jo, Teine-ku, Sapporo-shi, Hokkaido, Hokkaido
Telephone	+81-116882391
E-Mail	tomabechi-n@hus.ac.jp
Approval Status	Approval
Date of approval	Aug. 19, 2026

Plan to share IPD	No

Countries of Recruitment（Except Japan）	none