{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,29]],"date-time":"2025-08-29T10:07:48Z","timestamp":1756462068656,"version":"3.44.0"},"reference-count":69,"publisher":"Human Kinetics","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,11,1]]},"abstract":"<jats:p>Humans are fascinated by the bipedal locomotor capacities at both ends of the athletic spectrum\u2014sprinting speed and endurance. Some of the more popular field (eg,\u00a0soccer, rugby, and lacrosse) and court (eg,\u00a0basketball, tennis, and netball) sports utilize mixed energy systems requiring an interplay of both maximal sprinting speed (MSS) and maximal aerobic speed (MAS) to meet the high-intensity running demands of varying frequency, duration, intensity, and recovery. Recently, these locomotor capacities have been considered in combination to produce what is called the anaerobic speed reserve (ASR) as part of the locomotor profile concept (MSS, MAS, and ASR). The purpose of this narrative review is to (1)\u00a0provide an overview of the locomotor profile concept; (2)\u00a0review the assessment methods for estimating MSS, MAS, and ASR; (3)\u00a0examine the age-, sex-, and maturity-associated variations in MSS, MAS, and ASR; (4)\u00a0examine the trainability of MSS, MAS, and ASR in youth athletes; and (5)\u00a0conclude with the practical applications using principles of long-term athlete development for training the locomotor profile in youth field and court sport athletes. Based on the available data in young male athletes, MSS, MAS, and ASR generally increase with age and across maturity groups and are trainable. Overall, decisions on training need to consider the sport demands, current fitness and maturity status, and targeted training adaptation sought.<\/jats:p>","DOI":"10.1123\/pes.2024-0015","type":"journal-article","created":{"date-parts":[[2024,8,22]],"date-time":"2024-08-22T23:29:29Z","timestamp":1724369369000},"page":"211-223","source":"Crossref","is-referenced-by-count":2,"title":["The Development of Fast, Fit, and Fatigue Resistant Youth Field and Court Sport Athletes: A Narrative Review"],"prefix":"10.1123","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1937-047X","authenticated-orcid":true,"given":"Joey C.","family":"Eisenmann","sequence":"first","affiliation":[{"name":"Department of Health Sciences, Saint Xavier University, Chicago, IL, USA"},{"name":"Carnegie School of Sport, Leeds Beckett University\u2014Headingley Campus, Leeds, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jason","family":"Hettler","sequence":"additional","affiliation":[{"name":"IMG Academy, Bradenton, FL, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9686-0536","authenticated-orcid":true,"given":"Kevin","family":"Till","sequence":"additional","affiliation":[{"name":"Carnegie School of Sport, Leeds Beckett University\u2014Headingley Campus, Leeds, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"9","key":"r1","series-title":"J Strength Cond Res","doi-asserted-by":"publisher","first-page":"2330","DOI":"10.1519\/JSC.0b013e3181e381c1","article-title":"Activity profile and physiological requirements of junior elite basketball players in relation to aerobic-anaerobic fitness","volume":"24","author":"Abdelkrim NB","year":"2010","unstructured":"Abdelkrim NB, Castagna C, Jabri I, Battikh T, Fazaa SE, Ati JE. 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