Tokyo, March 20 -- UMIN Clinical Trials Registry (UMIN-CTR) received information related to the study (UMIN000060967) titled 'Effects of Long-Distance and Short-Distance Running Loads on Achilles Tendon Structure and Recovery Process: An Ultrasound Imaging Evaluation of Track and Field Athletes' on March 20.

Study Type: Interventional

Study Design: Basic Design - Parallel Randomization - Non-randomized Blinding - Open -no one is blinded Control - Active

Primary Sponsor: Institute - Gunma University

Condition: Condition - Achilles tendon disorder Classification by malignancy - Others Genomic information - NO

Objective: Narrative objectives1 - To clarify the "normal response profile" and "temporal criteria for complete recovery" of healthy Achilles tendons. To examine the relationship between functional recovery (such as ankle joint range of motion and muscle strength) and structural recovery of the Achilles tendon. Measure tendon elongation during repeated sprint running ground contact as a dynamic creep response, serving as a biomarker indicating the tendon's integrated deformation response to exercise load. Analyze how differences in dynamic creep response magnitude affect tendon reactivity and recovery time, establishing foundational data for objective evaluation metrics to aid in managing Achilles tendon injury risk. Basic objectives2 - Efficacy

Intervention: Interventions/Control_1 - Sprint Interventions/Control_2 - running

Eligibility: Age-lower limit - 18 years-old <= Age-upper limit - Not applicable Gender - Male and Female Key inclusion criteria - 1. Members of the Gunma University School of Medicine Track and Field Team 2. Individuals with no history of orthopedic conditions affecting the lower limbs within the past three months 3. Individuals who can undergo measurement using an ultrasound imaging device 4. Individuals who have received an explanation of this study and have provided informed consent Key exclusion criteria - 1. Individuals with a history of surgery on the foot or around the ankle 2. Individuals with a history of Achilles tendon rupture 3. Individuals with less than six months of athletic activity Target Size - 40

Recruitment Status: Recruitment status - Preinitiation Date of protocol fixation - 2025 Year 11 Month 13 Day Anticipated trial start date - 2025 Year 11 Month 13 Day Last follow-up date - 2030 Year 03 Month 31 Day

To know more, visit https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000067777

Disclaimer: Curated by HT Syndication.