{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,14]],"date-time":"2026-03-14T05:12:15Z","timestamp":1773465135423,"version":"3.50.1"},"reference-count":32,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,6]]},"abstract":"Abstract<\/jats:title>\n Mart\u00edn-L\u00f3pez, \u00c1, Mendes, RS, and Castillo-Rodr\u00edguez, A. Internal and external loads in training week before the competition in U19 high-level soccer players. J Strength Cond Res<\/jats:italic> 35(6): 1766\u20131772, 2021\u2014Nowadays, the information about the load in training sessions (TRs) and the relationship of these TRs with official competition are necessary to gain the sport success in soccer. The aim of this study was to quantify the different loads in TRs according to days before the competition (P-4, P-2, and P-1) on soccer players U19 based on their playing position and their sport success. Twenty-four male Spanish high-level players (age: 16.5 \u00b1 0.5 years; height: 1.69 \u00b1 0.04 m; and body mass: 63.0 \u00b1 6.3 kg) participated in the study. They were grouped according to their playing position: external defenders, internal defenders (ID), external midfielders, internal midfielders (IM), and forwards (FO). To conduct the study, global positioning system technology was used, and a 1-way analysis of variance and Pearson correlation were performed. The main results revealed that the highest physical and physiological responses in the TRs were shown by ID, IM, and players without sport success (p<\/jats:italic> < 0.05), and during P-2. In addition, sport success is predicted by the mean heart rate (R<\/jats:italic>\n 2<\/jats:sup> = 0.33; p<\/jats:italic> < 0.001). As conclusion, players covering central positions in the playing field performed higher physical and physiological demands than players covering exterior or forward positions. Furthermore, physical and physiological responses during the TRs P-2 may be similar to the responses produced in competition match and are notably different depending on the sport success of the soccer player.<\/jats:p>","DOI":"10.1519\/jsc.0000000000002975","type":"journal-article","created":{"date-parts":[[2018,12,19]],"date-time":"2018-12-19T22:15:07Z","timestamp":1545257707000},"page":"1766-1772","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":9,"title":["Internal and External Loads in Training Week Before the Competition in U19 High-Level Soccer Players"],"prefix":"10.1519","volume":"35","author":[{"given":"\u00c1lvaro","family":"Mart\u00edn-L\u00f3pez","sequence":"first","affiliation":[{"name":"Department of Physical Education and Sport, University of Granada, Granada, Spain; and"}]},{"given":"Rui Sousa","family":"Mendes","sequence":"additional","affiliation":[{"name":"Polytechnic Institute of Coimbra, School of Education of Coimbra, Department of Education, IIA, Robocorp, ASSERT, Portugal"}]},{"given":"Alfonso","family":"Castillo-Rodr\u00edguez","sequence":"additional","affiliation":[{"name":"Department of Physical Education and Sport, University of Granada, Granada, Spain; and"}]}],"member":"276","reference":[{"key":"R1-20250806","doi-asserted-by":"crossref","first-page":"562","DOI":"10.1016\/j.jsams.2013.08.005","article-title":"The acceleration dependent validity and reliability of 10 Hz GPS","volume":"17","author":"Akenhead","year":"2014","journal-title":"J Sci Med Sport"},{"key":"R2-20250806","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1080\/02640410802512775","article-title":"High-intensity running in English FA Premier League soccer matches","volume":"27","author":"Bradley","year":"2009","journal-title":"J Sports Sci"},{"key":"R3-20250806","doi-asserted-by":"crossref","first-page":"161","DOI":"10.1123\/IJSPP.2017-0208","article-title":"Monitoring athlete training loads: Consensus statement","volume":"12","author":"Bourdon","year":"2017","journal-title":"Int J Sports Physiol Perform"},{"key":"R4-20250806","first-page":"67","article-title":"Comparison of internal load between friendly matches and a conditional game in professional soccer players. Culture","volume":"11","author":"Campos-V\u00e1zquez","year":"2016","journal-title":"Sci Sports"},{"key":"R5-20250806","doi-asserted-by":"crossref","first-page":"1904","DOI":"10.1519\/JSC.0000000000002125","article-title":"Somatotype and body composition in young soccer players according to the playing position and sport success","volume":"33","author":"C\u00e1rdenas-Fern\u00e1ndez","year":"2019","journal-title":"J Strength Cond Res"},{"key":"R6-20250806","first-page":"130","article-title":"Effects of a soccer training program on the physical condition in young players-European University of Madrid","volume":"13","author":"Carrasco Fern\u00e1ndez","year":"2014","journal-title":"Kronos"},{"key":"R7-20250806","doi-asserted-by":"crossref","first-page":"1615","DOI":"10.1080\/02640414.2010.521168","article-title":"Time\u2013motion, heart rate, perceptual and motor behaviour demands in small-sides soccer games: Effects of pitch size","volume":"28","author":"Casamichana","year":"2010","journal-title":"J Sports Sci"},{"key":"R8-20250806","first-page":"121","article-title":"Physical demands on players Semiprofessional Soccer: Do You Train Like You Compete? Culture","volume":"6","author":"Casamichana","year":"2011","journal-title":"Sci Sports"},{"key":"R9-20250806","doi-asserted-by":"crossref","first-page":"837","DOI":"10.1519\/JSC.0b013e31822a61cf","article-title":"Comparing the physical demands of friendly matches and small-sided games in semiprofessional soccer players","volume":"26","author":"Casamichana","year":"2012","journal-title":"J Strength Cond Res"},{"key":"R10-20250806","first-page":"233","article-title":"Reliability and accuracy of 10 Hz GPS devices for short-distance exercise","volume":"10","author":"Castellano","year":"2011","journal-title":"J Sports Sci Med"},{"key":"R11-20250806","first-page":"355","article-title":"Sport with global positioning devices (GPS): Applications and limitations","volume":"23","author":"Castellano","year":"2014","journal-title":"Revista de Psicolog\u00eda Del Deporte"},{"key":"R12-20250806","doi-asserted-by":"crossref","first-page":"725","DOI":"10.1519\/JSC.0b013e31822602db","article-title":"Relationship between muscular strength and sprints with changes of direction","volume":"26","author":"Castillo-Rodr\u00edguez","year":"2012","journal-title":"J Strength Cond Res"},{"key":"R14-20250806","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1016\/j.jsams.2008.09.015","article-title":"Validity and reliability of GPS devices for measuring movement demands of team sports","volume":"13","author":"Coutts","year":"2010","journal-title":"J Sci Med Sport"},{"key":"R15-20250806","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1055\/s-2006-924294","article-title":"Performance characteristics according to playing position in elite soccer","volume":"28","author":"Di Salvo","year":"2007","journal-title":"Int J Sports Med"},{"key":"R16-20250806","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1080\/02640414.2012.746722","article-title":"Designing small-sided games for training tactical aspects in soccer: Extrapolating pitch sizes from full-size professional matches","volume":"31","author":"Fradua","year":"2013","journal-title":"J Sports Sci"},{"key":"R17-20250806","doi-asserted-by":"crossref","first-page":"83","DOI":"10.2478\/v10078-010-0052-z","article-title":"Physical characteristics and somatotype of soccer players according to playing level and position","volume":"26","author":"Hazir","year":"2010","journal-title":"J Hum Kinet"},{"key":"R18-20250806","doi-asserted-by":"crossref","first-page":"189","DOI":"10.2165\/11319770-000000000-00000","article-title":"New horizons for the methodology and physiology of training periodization","volume":"40","author":"Issurin","year":"2010","journal-title":"Sports Med"},{"key":"R19-20250806","doi-asserted-by":"crossref","first-page":"3358","DOI":"10.1519\/JSC.0b013e318216305d","article-title":"Anthropometric and physiological characteristics of young soccer players according to their playing positions: Relevance for competition success","volume":"25","author":"Lago-Pe\u00f1as","year":"2011","journal-title":"J Strength Cond Res"},{"key":"R20-20250806","doi-asserted-by":"crossref","first-page":"489","DOI":"10.1123\/ijspp.2014-0352","article-title":"Seasonal training-load quantification in elite English premier league soccer players","volume":"10","author":"Malone","year":"2015","journal-title":"Int J Sports Physiol Perform"},{"key":"R21-20250806","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1519\/00124278-200702000-00009","article-title":"Seasonal changes in VO2max among Division 1A collegiate women soccer players","volume":"21","author":"Miller","year":"2007","journal-title":"J Strength Cond Res"},{"key":"R22-20250806","doi-asserted-by":"crossref","first-page":"891","DOI":"10.2165\/00007256-200434130-00003","article-title":"Physiological changes associated with the pre-event taper in athletes","volume":"34","author":"Mujika","year":"2004","journal-title":"Sports Med"},{"key":"R23-20250806","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1080\/24733938.2017.1334958","article-title":"A contemporary multi-modal mechanical approach to training monitoring in elite professional soccer","volume":"1","author":"Owen","year":"2017","journal-title":"Sci Med Football"},{"key":"R24-20250806","doi-asserted-by":"crossref","first-page":"1705","DOI":"10.1519\/JSC.0000000000000810","article-title":"Heart rate\u2013based training intensity and its impact on injury incidence among elite-level professional soccer players","volume":"29","author":"Owen","year":"2015","journal-title":"J Strength Cond Res"},{"key":"R25-20250806","doi-asserted-by":"crossref","first-page":"665","DOI":"10.1177\/1747954117727851","article-title":"Analysis of a training mesocycle and positional quantification in elite European soccer players","volume":"12","author":"Owen","year":"2017","journal-title":"Int J Sports Sci Coaching"},{"key":"R26-20250806","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1123\/ijspp.4.3.381","article-title":"Validity and reliability of GPS units to monitor cricket-specific movement patterns","volume":"4","author":"Petersen","year":"2009","journal-title":"Int J Sports Physiol Perform"},{"key":"R27-20250806","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1055\/s-0031-1297952","article-title":"A new tool to measure training load in soccer training and match play","volume":"33","author":"Rebelo","year":"2012","journal-title":"Int J Sports Med"},{"key":"R28-20250806","first-page":"1","article-title":"Review of indicators performance in soccer","volume":"1","author":"Reina G\u00f3mez","year":"2012","journal-title":"Ibero-Am J Sci Phys Act Sports"},{"key":"R29-20250806","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1080\/02640410902729741","article-title":"The specificity of training prescription and physiological assessment: A review","volume":"27","author":"Reilly","year":"2009","journal-title":"J Sports Sci"},{"key":"R30-20250806","first-page":"177","article-title":"Body composition and physical performance in men's soccer: A study of a National Collegiate Athletic Association Division I team","volume":"20","author":"Silvestre","year":"2006","journal-title":"J Strength Cond Res"},{"key":"R31-20250806","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1080\/02640414.2011.627941","article-title":"Validity and reliability of GPS for measuring instantaneous velocity during acceleration, deceleration, and constant motion","volume":"40","author":"Varley","year":"2012","journal-title":"J Sport Sci"},{"key":"R32-20250806","first-page":"1336","article-title":"A robot for wrist rehabilitation. In: 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society","author":"Williams"},{"key":"R33-20250806","doi-asserted-by":"crossref","first-page":"473","DOI":"10.1136\/bjsm.2004.015511","article-title":"Soccer injury in the lower extremities","volume":"39","author":"Wong","year":"2005","journal-title":"Br J Sports Med"}],"container-title":["Journal of Strength & Conditioning Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.lww.com\/10.1519\/JSC.0000000000002975","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,6]],"date-time":"2025-08-06T02:06:43Z","timestamp":1754446003000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.lww.com\/10.1519\/JSC.0000000000002975"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6]]},"references-count":32,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2021]]}},"URL":"https:\/\/doi.org\/10.1519\/jsc.0000000000002975","relation":{},"ISSN":["1064-8011"],"issn-type":[{"value":"1064-8011","type":"print"}],"subject":[],"published":{"date-parts":[[2021,6]]}}}