{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,7]],"date-time":"2026-06-07T02:00:55Z","timestamp":1780797655294,"version":"3.54.1"},"reference-count":120,"publisher":"National Athletic Trainers' Association","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,6]]},"abstract":"\n Context<\/jats:title>\n Individuals often demonstrate reduced physical activity (PA) between 6 months and 5 years after anterior cruciate ligament reconstruction (ACLR), but little is known about PA levels during the first 6 months postoperatively.<\/jats:p>\n <\/jats:sec>\n \n Objective<\/jats:title>\n To identify factors that predict PA in this early period.<\/jats:p>\n <\/jats:sec>\n \n Design<\/jats:title>\n Prospective cohort study.<\/jats:p>\n <\/jats:sec>\n \n Setting<\/jats:title>\n Participants were recruited from an academic health science center and a private sports medicine clinic and assessed in a clinical and research setting.<\/jats:p>\n <\/jats:sec>\n \n Patients or Other Participants<\/jats:title>\n Sixty-three participants aged 13 to 35 years who underwent ACLR (19.6 \u00b1 5.0 years; 55.6% female).<\/jats:p>\n <\/jats:sec>\n \n Main Outcome Measure(s)<\/jats:title>\n Daily step counts and moderate-to-vigorous PA (MVPA) were assessed with a 3-axis accelerometer for 7 consecutive days during waking hours at 4 and 6 months after ACLR. The Tampa Scale of Kinesiophobia (TSK-11), International Knee Documentation Committee Subjective Knee Form (IKDC), and quadriceps strength were assessed at each time point. Graft type and meniscus repair status were extracted from operative reports, whereas sex was self-reported. Multiple linear regression was used to determine associations between these variables and PA outcomes.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n At 6 months, the combination of sex, TSK-11, IKDC, graft type, meniscus repair status, and quadriceps strength was significantly associated with daily steps (\n R<\/jats:italic>\n 2<\/jats:sup>\n = 0.260, adjusted\n R<\/jats:italic>\n 2<\/jats:sup>\n = 0.147,\n P<\/jats:italic>\n = .042). This group of variables was also associated with MVPA at both 4 months (\n R<\/jats:italic>\n 2<\/jats:sup>\n = 0.249, adjusted\n R<\/jats:italic>\n = 0.142,\n P<\/jats:italic>\n = .040) and 6 months (\n R<\/jats:italic>\n 2<\/jats:sup>\n = 0.272, adjusted\n R<\/jats:italic>\n 2<\/jats:sup>\n = 0.162,\n P<\/jats:italic>\n = .031). However, no individual factor was a significant predictor of PA at either time point (all\n P<\/jats:italic>\n s > .05).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Several clinical and demographic factors were collectively associated with early PA after ACLR, but they explained only a small portion of the variance. Additional factors likely influence early recovery, and further research is needed to understand their role and the long-term impact of early PA.<\/jats:p>\n <\/jats:sec>","DOI":"10.4085\/1062-6050-0467.25","type":"journal-article","created":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T01:16:17Z","timestamp":1770858977000},"page":"374-383","source":"Crossref","is-referenced-by-count":0,"title":["Predictors of Physical Activity Early After Anterior Cruciate Ligament Reconstruction"],"prefix":"10.4085","volume":"61","author":[{"given":"Manuel A.","family":"Romero-Padron","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brittany","family":"Weaver","sequence":"additional","affiliation":[{"name":"Department of Family Medicine, University of Nebraska Medical Center, Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Garrett","family":"Sacco","sequence":"additional","affiliation":[{"name":"Department of Child Neurology, University of Texas Southwestern Medical Center, Dallas"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David M.","family":"Werner","sequence":"additional","affiliation":[{"name":"College of Allied Health Professions, University of Nebraska Medical Center, Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Austin","family":"Post","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, University of Arizona, Tucson"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew A.","family":"Tao","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha"},{"name":"Physical Therapy Program, Department of Health and Rehabilitation Sciences, University of Nebraska Medical Center, Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth","family":"Wellsandt","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha"},{"name":"Physical Therapy Program, Department of Health and Rehabilitation Sciences, University of Nebraska Medical Center, Omaha"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2557","reference":[{"issue":"6","key":"i1938-162X-61-6-374-b01","series-title":"Am J Sports Med","first-page":"1502","article-title":"Incidence of anterior cruciate ligament tears and reconstruction: a 21-year population-based study","volume":"44","author":"Sanders","year":"2016","unstructured":"Sanders TL,\nMaradit Kremers H,\nBryan AJ, et al. 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Lancet Reg Health West Pac. 2022;21:100409. doi:10.1016\/j.lanwpc.2022.100409"},{"issue":"1","key":"i1938-162X-61-6-374-b03","series-title":"Knee Surg Sports Traumatol Arthrosc","first-page":"201","article-title":"Patient expectations of primary and revision anterior cruciate ligament reconstruction","volume":"24","author":"Feucht","year":"2016","unstructured":"Feucht MJ,\nCotic M,\nSaier T, et al. Patient expectations of primary and revision anterior cruciate ligament reconstruction. Knee Surg Sports Traumatol Arthrosc. 2016;24(1):201\u2013207. doi:10.1007\/s00167-014-3364-z"},{"issue":"7","key":"i1938-162X-61-6-374-b04","series-title":"Br J Sports Med","first-page":"596","article-title":"Return to sport following anterior cruciate ligament reconstruction surgery: a systematic review and meta-analysis of the state of play","volume":"45","author":"Ardern","year":"2011","unstructured":"Ardern CL,\nWebster KE,\nTaylor NF,\nFeller JA. Return to sport following anterior cruciate ligament reconstruction surgery: a systematic review and meta-analysis of the state of play. Br J Sports Med. 2011;45(7):596\u2013606. doi:10.1136\/bjsm.2010.076364"},{"issue":"11","key":"i1938-162X-61-6-374-b05","series-title":"Orthop J Sports Med","first-page":"2325967117736484","article-title":"Bone-patellar tendon-bone versus hamstring tendon autografts for primary anterior cruciate ligament reconstruction: a systematic review of overlapping meta-analyses","volume":"5","author":"Schuette","year":"2017","unstructured":"Schuette HB,\nKraeutler MJ,\nHouck DA,\nMcCarty EC. Bone-patellar tendon-bone versus hamstring tendon autografts for primary anterior cruciate ligament reconstruction: a systematic review of overlapping meta-analyses. 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Bull World Health Organ. 2022;100(12):815\u2013824. doi:10.2471\/BLT.22.288569"},{"issue":"19","key":"i1938-162X-61-6-374-b13","series-title":"JAMA","first-page":"2020","article-title":"The Physical Activity Guidelines for Americans","volume":"320","author":"Piercy","year":"2018","unstructured":"Piercy KL,\nTroiano RP,\nBallard RM, et al. The Physical Activity Guidelines for Americans. JAMA. 2018;320(19):2020\u20132028. doi:10.1001\/jama.2018.14854"},{"issue":"8","key":"i1938-162X-61-6-374-b14","series-title":"Am J Sports Med","first-page":"1893","article-title":"Objectively measured physical activity in patients after anterior cruciate ligament reconstruction","volume":"45","author":"Bell","year":"2017","unstructured":"Bell DR,\nPfeiffer KA,\nCadmus-Bertram LA, et al. Objectively measured physical activity in patients after anterior cruciate ligament reconstruction. Am J Sports Med. 2017;45(8):1893\u20131900. doi:10.1177\/0363546517698940"},{"key":"i1938-162X-61-6-374-b15","series-title":"Phys Ther Sport","first-page":"12","article-title":"Sex differences in physical activity engagement after ACL reconstruction","volume":"35","author":"Kuenze","year":"2019","unstructured":"Kuenze C,\nLisee C,\nPfeiffer KA, et al. Sex differences in physical activity engagement after ACL reconstruction. Phys Ther Sport. 2019;35:12\u201317. doi:10.1016\/j.ptsp.2018.10.016"},{"issue":"8","key":"i1938-162X-61-6-374-b16","series-title":"Med Sci Sports Exerc","first-page":"1617","article-title":"Physical activity and sedentary behavior differ by sex during the first six months after anterior cruciate ligament reconstruction","volume":"57","author":"Wellsandt","year":"2025","unstructured":"Wellsandt E,\nWerner D,\nTao M,\nMichaud K,\nWichman C,\nGolightly YM. Physical activity and sedentary behavior differ by sex during the first six months after anterior cruciate ligament reconstruction. Med Sci Sports Exerc. 2025;57(8):1617\u20131625. doi:10.1249\/MSS.0000000000003714"},{"issue":"3","key":"i1938-162X-61-6-374-b17","series-title":"Sports Health","first-page":"228","article-title":"Self-reported fear predicts functional performance and second ACL injury after ACL reconstruction and return to sport: a pilot study","volume":"10","author":"Paterno","year":"2018","unstructured":"Paterno MV,\nFlynn K,\nThomas S,\nSchmitt LC. Self-reported fear predicts functional performance and second ACL injury after ACL reconstruction and return to sport: a pilot study. 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