{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T01:32:51Z","timestamp":1772501571697,"version":"3.50.1"},"reference-count":44,"publisher":"Human Kinetics","issue":"11","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2018,11,1]]},"abstract":"Background<\/jats:bold>: The obesity epidemic is a global concern. Standard behavioral treatment including increased physical activity, reduced energy intake, and behavioral change counseling is an effective lifestyle intervention for weight loss. Purpose<\/jats:bold>: To identify distinct step count patterns among weight loss intervention participants, examine weight loss differences by trajectory group, and examine baseline factors associated with trajectory group membership. Methods<\/jats:bold>: Both groups received group-based standard behavioral treatment while the experimental group received up to 30 additional, one-on-one self-efficacy enhancement sessions. Data were analyzed using group-based trajectory modeling, analysis of variance, chi-square tests, and multinomial logistic regression. Results<\/jats:bold>: Participants (N\u2009=\u2009120) were mostly female (81.8%) and white (73.6%) with a mean (SD) body mass index of 33.2 (3.8)\u00a0kg\/m2<\/jats:sup>. Four step count trajectory groups were identified: active<\/jats:italic> (>10,000\u00a0steps\/day; 11.7%), somewhat active<\/jats:italic> (7500\u201310,000 steps\/day; 28.3%), low active<\/jats:italic> (5000\u20137500\u00a0steps\/day; 27.5%), and sedentary<\/jats:italic> (<5000\u00a0steps\/day; 32.5%). Percent weight loss at 12 months increased incrementally by trajectory group (5.1% [5.7%], 7.8% [6.9%], 8.0% [7.4%], and 13.63% [7.0%], respectively; P<\/jats:italic>\u2009=\u2009.001). At baseline, lower body mass index and higher perceived health predicted membership in the better performing trajectory groups. Conclusions<\/jats:bold>: Within a larger group of adults in a weight loss intervention, 4 distinct trajectory groups were identified and group membership was associated with differential weight loss.<\/jats:p>","DOI":"10.1123\/jpah.2017-0484","type":"journal-article","created":{"date-parts":[[2018,10,13]],"date-time":"2018-10-13T05:54:22Z","timestamp":1539410062000},"page":"840-846","source":"Crossref","is-referenced-by-count":8,"title":["Group-Based Trajectory Analysis of Physical Activity Change in a US Weight Loss Intervention"],"prefix":"10.1123","volume":"15","author":[{"given":"Christopher C.","family":"Imes","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yaguang","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dara D.","family":"Mendez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bonny J.","family":"Rockette-Wagner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Meghan K.","family":"Mattos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rachel W.","family":"Goode","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Susan M.","family":"Sereika","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lora E.","family":"Burke","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"key":"ref181","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1097\/00005650-199401000-00004","article-title":"The MOS 36-item Short-Form Health Survey (SF-36): III. 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