{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T09:07:58Z","timestamp":1765357678958,"version":"3.37.3"},"reference-count":39,"publisher":"Public Library of Science (PLoS)","issue":"9","license":[{"start":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T00:00:00Z","timestamp":1725494400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003478","name":"Ministry of Health, Labour and Welfare","doi-asserted-by":"publisher","award":["H17-Choju-Ippan-016"],"award-info":[{"award-number":["H17-Choju-Ippan-016"]}],"id":[{"id":"10.13039\/501100003478","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["18H04083"],"award-info":[{"award-number":["18H04083"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["22K11365"],"award-info":[{"award-number":["22K11365"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["23H03281"],"award-info":[{"award-number":["23H03281"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013127","name":"SEI Group CSR Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100013127","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Purpose<\/jats:title>\n<jats:p>To examine the hypothesis that an increase in response of postmenopausal bone to interval walking training (IWT) depends on baseline bone mineral densities (BMDs).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Methods<\/jats:title>\n<jats:p>Two hundred and thirty-four postmenopausal women (64\u00b15 (SD) yr) with no medication for osteoporosis performed 5-month IWT, repeating fast and slow walking at \u226570% and ~40% peak aerobic capacity, respectively, for 3 minutes each per set, \u22655 sets\/day, \u22654 days\/week. They were recruited from those who had performed IWT \u22656 months before participating in the study so that their physical fitness and lifestyle-related disease symptoms had almost reached a steady state at the time of their participation. We measured BMDs for the lumbar spine (LS), bilateral femoral neck (FN), and bilateral total hip (TH) by dual-energy X-ray absorptiometry (DXA) before and after the intervention. We used a multiple regression analysis to identify significant independent factors for increasing BMDs after the intervention as baseline physical characteristics, exercise intensity, and exercise time during IWT were the candidates. For any bone site where the independent factor identified was singular, we analyzed the relationship between the identified factor vs increases in BMD after the intervention (\u0394BMD) by the locally weighted scatterplot smoothing (LOWESS) method.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>Almost all subjects completed the designated protocol with minimal adverse events. We found that significant determinants for increasing BMDs were the baseline BMDs for all bone sites, as well as age and body mass index for TH (all, P&lt;0.02). Furthermore, the LOWESS trendline between \u0394BMDs vs the baseline BMDs, divided equally into 10 bins for LS and FN, respectively, showed that \u0394BMD responses (<jats:italic>Y<\/jats:italic>) were attenuated as the baseline BMDs (<jats:italic>X<\/jats:italic>) increased in the lower 4 bins and then showed a flat line (<jats:italic>Y<\/jats:italic> = ~0) in the remaining higher 6 bins for LS and FN. When the lower 4 bins and the higher 6 bins of the baseline BMD were pooled, respectively, BMDs significantly increased by 1.8% and 1.0% in the lower groups for LS and FN, respectively (both, P&lt;0.001) while not in the higher groups after the intervention (both, P&gt;0.3).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec004\">\n<jats:title>Conclusions<\/jats:title>\n<jats:p>IWT may be of benefit with minimal adverse events to postmenopausal women, although the effects were greater in those with lower baseline BMDs.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec005\">\n<jats:title>Trial registration<\/jats:title>\n<jats:p><jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/rctportal.niph.go.jp\/s\/detail\/um?trial_id=UMIN000047428#\" xlink:type=\"simple\">UMIN000047428<\/jats:ext-link>. <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/rctportal.niph.go.jp\/s\/detail\/um?trial_id=UMIN000047428\" xlink:type=\"simple\">https:\/\/rctportal.niph.go.jp\/s\/detail\/um?trial_id=UMIN000047428#<\/jats:ext-link>.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0309936","type":"journal-article","created":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T17:24:52Z","timestamp":1725557092000},"page":"e0309936","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Increased response of postmenopausal bone to interval walking training depends on baseline bone mineral density"],"prefix":"10.1371","volume":"19","author":[{"given":"Rizka Nugraheni","family":"Martyanti","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mayuko","family":"Morikawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaaki","family":"Hanaoka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3338-7056","authenticated-orcid":true,"given":"Satoshi","family":"Tanaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yukio","family":"Nakamura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Nose","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6171-1338","authenticated-orcid":true,"given":"Shizue","family":"Masuki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2024,9,5]]},"reference":[{"key":"pone.0309936.ref001","doi-asserted-by":"crossref","first-page":"1761","DOI":"10.1016\/S0140-6736(02)08657-9","article-title":"Epidemiology 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