{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T14:59:32Z","timestamp":1777042772240,"version":"3.51.4"},"reference-count":34,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T00:00:00Z","timestamp":1776988800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAPMA"],"abstract":"<jats:p>Background: Chronic ankle instability (CAI) post-sprain leads to persistent functional deficits. This study evaluated CAI\u2019s specific impact on ankle dorsiflexion, heel lift function, stability, broader functional impairments, and quality of life. Methods: A case\u2013control study enrolled 100 CAI patients (post-ankle sprain) and 100 healthy controls. Ankle strength (isokinetic dynamometer), stability (pressure plate), maximum dorsiflexion\/plantar flexion ROM (mobility meter), functional limitations (0\u201310 activity scale), pain (VAS), coordination (Agility T-test, figure-of-eight test), and quality of life (FAOS) were compared. ANOVA and Mann\u2013Whitney U tests were used. Results: Compared to controls, the CAI group showed significantly reduced ankle dorsiflexion strength (114.53 \u00b1 10.47 N vs. 156.34 \u00b1 13.26 N), heel lift strength (78.69 \u00b1 5.44 N vs. 105.45 \u00b1 8.28 N), stability scores (4.73 \u00b1 0.52 vs. 8.65 \u00b1 0.71 points), and ROM (dorsiflexion: 16.49\u00b0 \u00b1 1.23\u00b0 vs. 22.35\u00b0 \u00b1 1.65\u00b0; plantar flexion: 27.58\u00b0 \u00b1 6.51\u00b0 vs. 43.27\u00b0 \u00b1 5.45\u00b0). CAI patients reported higher activity limitation (6.34 \u00b1 1.25 vs. 2.16 \u00b1 0.55) and pain (5.37 \u00b1 1.02 vs. 0.23 \u00b1 0.01) and prolonged Agility T-test (11.24 \u00b1 1.37 s vs. 7.51 \u00b1 1.16 s) and figure-of-eight (16.35 \u00b1 1.67 s vs. 12.43 \u00b1 1.39 s) times. FAOS subscale scores (symptoms, daily activities, sports, pain) were significantly lower in the CAI group. All p &lt; 0.05. Conclusions: CAI significantly compromises ankle dorsiflexion, heel lift strength, stability, and functional mobility, correlating with increased pain, activity restriction, and diminished quality of life. Rehabilitation should prioritize neuromuscular re-education, strength restoration, and dynamic stability training to improve outcomes.<\/jats:p>","DOI":"10.3390\/japma116030025","type":"journal-article","created":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T12:29:11Z","timestamp":1777033751000},"page":"25","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of Chronic Ankle Instability Following Ankle Sprain on Ankle Dorsiflexion, Heel Lift Function, and Quality of Life"],"prefix":"10.3390","volume":"116","author":[{"given":"Jia","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Podiatry, Tianjin Hospital, Tianjin 300211, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haomin","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Podiatry, Tianjin Hospital, Tianjin 300211, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiantie","family":"Zeng","sequence":"additional","affiliation":[{"name":"Department of Podiatry, Tianjin Hospital, Tianjin 300211, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guijun","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Podiatry, Tianjin Hospital, Tianjin 300211, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3581","DOI":"10.1007\/s00402-021-03949-2","article-title":"Arthroscopic modified Brostr\u00f6m operation versus open reconstruction with local periosteal flap in chronic ankle instability","volume":"142","author":"Mederake","year":"2022","journal-title":"Arch. 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