{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T16:13:35Z","timestamp":1786119215774,"version":"build-2736575974"},"reference-count":0,"publisher":"Kinesiology Scholarly Trends, Abstracts, and Research","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Exerc Sci"],"abstract":"<jats:p>The fitness movement in the United States has evolved substantially since its emergence in the late 20th century, with social media platforms like YouTube and TikTok now playing a pivotal role in disseminating fitness programs and associated claims. One program that has gained considerable popularity is the 12-3-30 treadmill workout (12-3-30), which involves walking at a 12% grade at 3 mph for 30 minutes. Despite widespread claims about its effectiveness in burning fat and calories, there is a lack of peer-reviewed scientific studies evaluating these claims. The present study investigated metabolic responses to 12-3-30 compared to self-paced treadmill running, with both sessions matched for total energy expenditure. Sixteen participants (7 female, 9 male) completed both sessions in a controlled laboratory setting, where metabolic data were collected using a metabolic analyzer. The measures recorded were completion time, total energy expenditure, energy expenditure rate, and substrate utilization (percentage of carbohydrate [%CHO] and fat [%FAT]). The results showed that, when matched for total energy expenditure, 12 3 30 had a significantly longer completion time, lower energy expenditure rate, higher %FAT, and lower %CHO than self-paced running. While 12-3-30 may be less time efficient than self-paced running for expending energy, it may be more advantageous for individuals aiming to increase fat utilization. The present study enhances our understanding of the metabolic demands associated with a trending fitness program and highlights the importance of scientifically evaluating such programs to provide evidence-based recommendations.<\/jats:p>","DOI":"10.70252\/ubix5911","type":"journal-article","created":{"date-parts":[[2025,1,1]],"date-time":"2025-01-01T17:19:26Z","timestamp":1735751966000},"page":"56-64","source":"Crossref","is-referenced-by-count":0,"title":["An Exploratory Study Comparing the Metabolic Responses between the 12-3-30 Treadmill Workout and Self-Paced Treadmill Running"],"prefix":"10.70252","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6495-0166","authenticated-orcid":false,"given":"Michael W.H.","family":"Wong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5894-3851","authenticated-orcid":false,"given":"Dustin W.","family":"Davis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivia R.","family":"Perez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bianca","family":"Weyers","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Devin M.","family":"Green","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alan V.","family":"Garcia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4445-7614","authenticated-orcid":false,"given":"James W.","family":"Navalta","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56809","published-online":{"date-parts":[[2025]]},"container-title":["International Journal of Exercise Science"],"original-title":[],"link":[{"URL":"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11798546\/pdf\/ijes-18-6-56.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,6]],"date-time":"2026-08-06T17:46:11Z","timestamp":1786038371000},"score":1,"resource":{"primary":{"URL":"https:\/\/digitalcommons.wku.edu\/ijes\/vol18\/iss6\/1\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025]]},"references-count":0,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2025]]}},"URL":"https:\/\/doi.org\/10.70252\/ubix5911","relation":{},"ISSN":["1939-795X"],"issn-type":[{"value":"1939-795X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025]]}}}