{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T03:03:06Z","timestamp":1787022186490,"version":"build-2736575974"},"reference-count":88,"publisher":"Public Library of Science (PLoS)","issue":"4","license":[{"start":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T00:00:00Z","timestamp":1777420800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>This study aimed to develop a supine exercise program that promotes coordination between trunk stability and lower extremity control, and to evaluate its short-term effects on balance and physical function in healthy young adults. In human postural control, vertical alignment of the head, thorax, and pelvis\u2014segments with relatively high mass\u2014is essential for biomechanical stability. This alignment is regulated through coordinated activity of the lower limbs in bipedal standing and movement. Thus, exercise interventions that integrate trunk and lower extremity function may improve movement efficiency and postural control. Using an experimental framework modeled on clinical study design, we conducted two separate studies to assess the short-term effects of a supine exercise program designed to link trunk stability with coordinated lower extremity control. The program consisted of a series of movements performed in a supine position to facilitate integrated neuromuscular control between the trunk and lower limbs. Experiment 1 was a randomized crossover trial involving 17 healthy males. Participants completed both intervention and control phases, with physical function assessed via six tests (grip strength, sitting trunk flexion, sit-ups, standing long jump, side-step, and 50-meter run) and static balance evaluated using stabilometry. Experiment 2 used a pre-post design with 22 healthy males and females, assessing dynamic balance through kinematic analysis of the side-step task. In both experiments, participants performed a 10-minute supine coordination-focused exercise program once daily for two weeks. Results showed significant improvements in static balance, side-step kinematics, and sitting trunk flexion. No significant changes were observed in muscle strength or power-related performance tests. These findings suggest that this short-duration exercise program in a biomechanically safe supine position may enhance postural control and flexibility in healthy individuals. The approach may also be useful for fall prevention and early-stage rehabilitation.<\/jats:p>\n                  <jats:p>Trial Registration<\/jats:p>\n                  <jats:p>This study was registered with the UMIN Clinical Trials Registry (UMIN000057589 and UMIN000057597).<\/jats:p>","DOI":"10.1371\/journal.pone.0345749","type":"journal-article","created":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T17:21:50Z","timestamp":1777483310000},"page":"e0345749","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":2,"title":["A supine exercise program linking trunk stability with lower extremity coordination is associated with improved body balance and agility: A study using randomized crossover and pre-post trial 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