{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T16:58:59Z","timestamp":1792429139944,"version":"4.5.0"},"reference-count":39,"publisher":"Public Library of Science (PLoS)","issue":"1","license":[{"start":{"date-parts":[[2026,1,12]],"date-time":"2026-01-12T00:00:00Z","timestamp":1768176000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"\n This study examined physiological recovery between repeated tennis drills in elite adolescent tennis players. Ten tennis players (5 males, 5 females; age 17\u2009\u00b1\u20092 years) underwent treadmill testing to establish maximal physiological characteristics. Several days later participants completed three standardized on-court tennis drills with fixed rest intervals, during which physiological parameters were monitored. A one-way repeated-measures ANOVA was used to compare physiological responses across the three drills.\n \n \n \n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n \n \n O<\/mml:mtext>\n <\/mml:mrow>\n \n 2max<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n utilization stayed above 75% in all drills, peaking during the first drill (p\u2009=\u20090.003). During recovery,\n \n \n \n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n \n \n O<\/mml:mtext>\n <\/mml:mrow>\n \n 2max<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n utilization decreased from 58\u2009\u00b1\u20098% in the first recovery to 50\u2009\u00b1\u20099% (p\u2009=\u20090.018) and 47\u2009\u00b1\u200912% (p\u2009=\u20090.022) in the second and third recovery, respectively. The respiratory exchange ratio (RER) stayed below 1.0 during drills, while increasing during recovery periods, (1.07\u2009\u00b1\u20090.08, 1.00\u2009\u00b1\u20090.01, 1.04\u2009\u00b1\u20090.05; p\u2009=\u20090.014). Ventilatory equivalents for oxygen (\n \n \n \n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n E<\/mml:mtext>\n \/<\/mml:mo>\n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n O<\/mml:mtext>\n <\/mml:mrow>\n \n \n 2<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:mrow>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n ) were stable (p\u2009=\u20090.054), while those for carbon dioxide (\n \n \n \n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n E<\/mml:mtext>\n \/<\/mml:mo>\n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n CO<\/mml:mtext>\n <\/mml:mrow>\n \n \n 2<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:mrow>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n ) increased progressively for each recovery period (29.5\u2009\u00b1\u20093.6, 31.5\u2009\u00b1\u20093.8, 32.3\u2009\u00b1\u20094.3; p\u2009<\u20090.001). Blood lactate concentration differed significantly across recovery periods (p\u2009=\u20090.035) with the lowest value in recovery period two (5.9\u2009\u00b1\u20092.0, 4.9\u2009\u00b1\u20091.9 and 5.6\u2009\u00b1\u20092.0 mmol\u00b7l\n -1<\/jats:sup>\n ). These findings highlight a sustained metabolic demand extending into the recovery phase during standardized tennis drills, characterized by substantial\n \n \n \n \n \n \n \n V<\/mml:mtext>\n <\/mml:mrow>\n \u02d9<\/mml:mo>\n <\/mml:mover>\n \n \n O<\/mml:mtext>\n <\/mml:mrow>\n \n 2max<\/mml:mtext>\n <\/mml:mrow>\n <\/mml:msub>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n utilization and elevated respiratory compensation. This suggests a significant anaerobic contribution and underscores the intensity of the physiological load imposed even after exercise cessation.\n <\/jats:p>","DOI":"10.1371\/journal.pone.0340767","type":"journal-article","created":{"date-parts":[[2026,1,12]],"date-time":"2026-01-12T18:22:00Z","timestamp":1768242120000},"page":"e0340767","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Rally and recover: Physiological demands between tennis 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Cohen","year":"1988","edition":"2"},{"issue":"5","key":"pone.0340767.ref027","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1136\/bjsm.2005.023168","article-title":"Intensity of tennis match play","volume":"40","author":"J Fernandez","year":"2006","journal-title":"Br J Sports Med"},{"issue":"3","key":"pone.0340767.ref028","doi-asserted-by":"crossref","first-page":"954","DOI":"10.1152\/jappl.1992.72.3.954","article-title":"Acid-base regulation during exercise and recovery in humans","volume":"72","author":"W Stringer","year":"1992","journal-title":"J Appl Physiol (1985)"},{"issue":"1","key":"pone.0340767.ref029","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1007\/s00421-009-1101-y","article-title":"Respiratory compensation and blood pH regulation during variable intensity exercise in trained versus untrained subjects","volume":"107","author":"J Del Coso","year":"2009","journal-title":"Eur J Appl Physiol"},{"issue":"5","key":"pone.0340767.ref030","doi-asserted-by":"crossref","first-page":"342","DOI":"10.1055\/s-2007-971928","article-title":"Physiological differences between professional and elite road cyclists","volume":"19","author":"A Luc\u00eda","year":"1998","journal-title":"Int J Sports Med"},{"issue":"2","key":"pone.0340767.ref031","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1519\/JSC.0b013e3182260455","article-title":"Anaerobic threshold assessment through the ventilatory method during roller-ski skating testing: right or wrong?","volume":"26","author":"N Fabre","year":"2012","journal-title":"J Strength Cond Res"},{"issue":"3","key":"pone.0340767.ref032","first-page":"271","article-title":"Blood lactate clearance after maximal exercise depends on active recovery intensity","volume":"54","author":"J Devlin","year":"2014","journal-title":"J Sports Med Phys 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