{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T00:22:27Z","timestamp":1759537347590,"version":"build-2065373602"},"reference-count":47,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T00:00:00Z","timestamp":1758067200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Increasing the length of the biceps femoris long head (BFlh) fascicle is one of the objectives of hamstring injury prevention programs. This study aimed to investigate training\u2010induced adaptations in BFlh architecture and performance measures after a six\u2010week resistance training program with gravitational or inertial 45\u00b0 hip extension (HE) exercise and a subsequent detraining period. Thirty\u2010two resistance\u2010trained males were assigned to a group doing a HE training program with gravitational loading (HE\u2010G), HE by inertial loading (HE\u2010I), or to a control group (CG). BFlh architecture, knee flexion and hip extension strength, jumping performance by means of the countermovement (CMJ) and squat jump (SJ) tests, and soreness before and after each training session were evaluated. HE\u2010I participants modified the initial length of the BHlh fascicle (9.86\u00a0cm), increasing it by 1.64\u00a0cm at the end of the intervention and remaining 1.48\u00a0cm longer than baseline after the detraining period. Both HE modalities improved hip extensor strength (51.2\u00a0N for HE\u2010G and 65.0\u00a0N) and only HE\u2010I improved knee flexor strength (69.9\u00a0N). Soreness for HE\u2010I exercise showed lower values than gravity\u2010loaded performance, with at least one point difference across sessions, and more than two in some of the final sessions. This study provides evidence suggesting that HE performed with inertial loading is an effective exercise for lengthening the BFlh fascicle and promoting improvements in knee flexion strength and SJ performance, aspects not modifiable by the gravitational modality.<\/jats:p>","DOI":"10.1002\/ejsc.70048","type":"journal-article","created":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T14:35:48Z","timestamp":1758119748000},"source":"Crossref","is-referenced-by-count":0,"title":["Comparison of Architectural and Performance Adaptations of Hip Extension Exercise Under Gravitational or Inertial Loading Conditions: A Randomized Controlled Trial"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8201-0189","authenticated-orcid":false,"given":"Rodrigo","family":"Mart\u00edn\u2010San Agust\u00edn","sequence":"first","affiliation":[{"name":"Department of Physiotherapy Clinimetry and Technological Development in Therapeutic Exercise Research Group (CLIDET) 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