The Yo-Yo IE2 test: Physiological response for untrained men versus trained soccer players

Peter Krustrup; Paul S Bradley; Jesper F Christensen; Carlo Castagna; Sarah Jackman; Luke Connolly; Morten Bredsgaard Randers; Magni Mohr; Jens Bangsbo

doi:10.1249/MSS.0000000000000377

The Yo-Yo IE2 test: Physiological response for untrained men versus trained soccer players

Peter Krustrup, Paul S Bradley, Jesper F Christensen, Carlo Castagna, Sarah Jackman, Luke Connolly, Morten Bredsgaard Randers, Magni Mohr, Jens Bangsbo

August Krogh Sektionen for Human Fysiologi

19 Citationer (Scopus)

Abstract

Purpose: This study aimed to examine the physical capacity and physiological response to the Yo-Yo Intermittent Endurance level 2 test (IE2) for untrained individuals (UTR) and trained male soccer players (TR) and to investigate the determinants of intense intermittent exercise performance. Methods: Thirty-four healthy UTR males and 15 age-matched TR performed a maximal incremental treadmill test and a Yo-Yo IE2 test. Muscle biopsies and blood samples were obtained, and heart rate (HR) was measured before, during, and after tests. Results: UTR had a 67% lower (P < 0.01) Yo-Yo IE2 performance (665 ± 271 vs 2027 ± 298 m; effect size (ES), 4.8), 34% lower VO_2max (P < 0.01), and 19% lower resting muscle glycogen (P < 0.05) than those of TR. Blood lactate concentration and HR during the first 560 m of the Yo-Yo IE2 test were higher (P < 0.01) in UTR than those in TR (560 m, 7.4 ± 2.8 vs 2.4 ± 0.8 mM; ES, 1.7-2.8; 188 ± 11 vs 173 ± 8 bpm; ES, 0.9-1.5), with no differences at exhaustion. Time >95% HR_max was lower (P < 0.01) in UTR than that in TR (1.0 ± 1.1 vs 6.3 ± 2.9 min; ES, 3.1). Mean rates of muscle creatine phosphate utilization (16.5 ± 9.5 vs 4.3 ± 2.7 mmol·kg¹ d.w·min^-1), muscle lactate accumulation (16.8 ± 9.1 vs 4.2 ± 2.9 mmol·kg^-1 d.w.·min^-1), and glycogen breakdown (29.6 ± 14.2 vs 7.7 ± 5.4 mmol·kg^-1 d.w.·min^-1) were fourfold higher (P < 0.01; ES, 1.4-1.7) in UTR than those in TR. For UTR, correlations (P < 0.01) were observed between Yo-Yo IE2 performance and VO_2max (r = 0.77), incremental treadmill test performance (r = 0.79), and muscle citrate synthase activity (r = 0.57) but not for TR (r = -0.12 to 0.50; P > 0.05). Conclusions: The Yo-Yo IE2 test was shown to possess high construct validity by showing large differences in performance, HR, and anaerobic metabolism between UTR and TR. In addition, VO_2max seemed to be important for intermittent exercise performance in UTR but not for TR.

Originalsprog	Engelsk
Tidsskrift	Medicine and Science in Sports and Exercise
Vol/bind	47
Udgave nummer	1
Sider (fra-til)	100-108
Antal sider	9
ISSN	0195-9131
DOI	https://doi.org/10.1249/MSS.0000000000000377
Status	Udgivet - 1 jan. 2015

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10.1249/MSS.0000000000000377

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@article{5f242ff833ec4ead96d145ab13a9cba0,

title = "The Yo-Yo IE2 test: Physiological response for untrained men versus trained soccer players",

abstract = "Purpose: This study aimed to examine the physical capacity and physiological response to the Yo-Yo Intermittent Endurance level 2 test (IE2) for untrained individuals (UTR) and trained male soccer players (TR) and to investigate the determinants of intense intermittent exercise performance. Methods: Thirty-four healthy UTR males and 15 age-matched TR performed a maximal incremental treadmill test and a Yo-Yo IE2 test. Muscle biopsies and blood samples were obtained, and heart rate (HR) was measured before, during, and after tests. Results: UTR had a 67% lower (P < 0.01) Yo-Yo IE2 performance (665 ± 271 vs 2027 ± 298 m; effect size (ES), 4.8), 34% lower VO2max (P < 0.01), and 19% lower resting muscle glycogen (P < 0.05) than those of TR. Blood lactate concentration and HR during the first 560 m of the Yo-Yo IE2 test were higher (P < 0.01) in UTR than those in TR (560 m, 7.4 ± 2.8 vs 2.4 ± 0.8 mM; ES, 1.7-2.8; 188 ± 11 vs 173 ± 8 bpm; ES, 0.9-1.5), with no differences at exhaustion. Time >95% HRmax was lower (P < 0.01) in UTR than that in TR (1.0 ± 1.1 vs 6.3 ± 2.9 min; ES, 3.1). Mean rates of muscle creatine phosphate utilization (16.5 ± 9.5 vs 4.3 ± 2.7 mmol·kg1 d.w·min-1), muscle lactate accumulation (16.8 ± 9.1 vs 4.2 ± 2.9 mmol·kg-1 d.w.·min-1), and glycogen breakdown (29.6 ± 14.2 vs 7.7 ± 5.4 mmol·kg-1 d.w.·min-1) were fourfold higher (P < 0.01; ES, 1.4-1.7) in UTR than those in TR. For UTR, correlations (P < 0.01) were observed between Yo-Yo IE2 performance and VO2max (r = 0.77), incremental treadmill test performance (r = 0.79), and muscle citrate synthase activity (r = 0.57) but not for TR (r = -0.12 to 0.50; P > 0.05). Conclusions: The Yo-Yo IE2 test was shown to possess high construct validity by showing large differences in performance, HR, and anaerobic metabolism between UTR and TR. In addition, VO2max seemed to be important for intermittent exercise performance in UTR but not for TR.",

author = "Peter Krustrup and Bradley, {Paul S} and Christensen, {Jesper F} and Carlo Castagna and Sarah Jackman and Luke Connolly and Randers, {Morten Bredsgaard} and Magni Mohr and Jens Bangsbo",

note = "CURIS 2015 NEXS 010",

year = "2015",

month = jan,

day = "1",

doi = "10.1249/MSS.0000000000000377",

language = "English",

volume = "47",

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journal = "Medicine and Science in Sports and Exercise",

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TY - JOUR

T1 - The Yo-Yo IE2 test

T2 - Physiological response for untrained men versus trained soccer players

AU - Krustrup, Peter

AU - Bradley, Paul S

AU - Christensen, Jesper F

AU - Castagna, Carlo

AU - Jackman, Sarah

AU - Connolly, Luke

AU - Randers, Morten Bredsgaard

AU - Mohr, Magni

AU - Bangsbo, Jens

N1 - CURIS 2015 NEXS 010

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Purpose: This study aimed to examine the physical capacity and physiological response to the Yo-Yo Intermittent Endurance level 2 test (IE2) for untrained individuals (UTR) and trained male soccer players (TR) and to investigate the determinants of intense intermittent exercise performance. Methods: Thirty-four healthy UTR males and 15 age-matched TR performed a maximal incremental treadmill test and a Yo-Yo IE2 test. Muscle biopsies and blood samples were obtained, and heart rate (HR) was measured before, during, and after tests. Results: UTR had a 67% lower (P < 0.01) Yo-Yo IE2 performance (665 ± 271 vs 2027 ± 298 m; effect size (ES), 4.8), 34% lower VO2max (P < 0.01), and 19% lower resting muscle glycogen (P < 0.05) than those of TR. Blood lactate concentration and HR during the first 560 m of the Yo-Yo IE2 test were higher (P < 0.01) in UTR than those in TR (560 m, 7.4 ± 2.8 vs 2.4 ± 0.8 mM; ES, 1.7-2.8; 188 ± 11 vs 173 ± 8 bpm; ES, 0.9-1.5), with no differences at exhaustion. Time >95% HRmax was lower (P < 0.01) in UTR than that in TR (1.0 ± 1.1 vs 6.3 ± 2.9 min; ES, 3.1). Mean rates of muscle creatine phosphate utilization (16.5 ± 9.5 vs 4.3 ± 2.7 mmol·kg1 d.w·min-1), muscle lactate accumulation (16.8 ± 9.1 vs 4.2 ± 2.9 mmol·kg-1 d.w.·min-1), and glycogen breakdown (29.6 ± 14.2 vs 7.7 ± 5.4 mmol·kg-1 d.w.·min-1) were fourfold higher (P < 0.01; ES, 1.4-1.7) in UTR than those in TR. For UTR, correlations (P < 0.01) were observed between Yo-Yo IE2 performance and VO2max (r = 0.77), incremental treadmill test performance (r = 0.79), and muscle citrate synthase activity (r = 0.57) but not for TR (r = -0.12 to 0.50; P > 0.05). Conclusions: The Yo-Yo IE2 test was shown to possess high construct validity by showing large differences in performance, HR, and anaerobic metabolism between UTR and TR. In addition, VO2max seemed to be important for intermittent exercise performance in UTR but not for TR.

AB - Purpose: This study aimed to examine the physical capacity and physiological response to the Yo-Yo Intermittent Endurance level 2 test (IE2) for untrained individuals (UTR) and trained male soccer players (TR) and to investigate the determinants of intense intermittent exercise performance. Methods: Thirty-four healthy UTR males and 15 age-matched TR performed a maximal incremental treadmill test and a Yo-Yo IE2 test. Muscle biopsies and blood samples were obtained, and heart rate (HR) was measured before, during, and after tests. Results: UTR had a 67% lower (P < 0.01) Yo-Yo IE2 performance (665 ± 271 vs 2027 ± 298 m; effect size (ES), 4.8), 34% lower VO2max (P < 0.01), and 19% lower resting muscle glycogen (P < 0.05) than those of TR. Blood lactate concentration and HR during the first 560 m of the Yo-Yo IE2 test were higher (P < 0.01) in UTR than those in TR (560 m, 7.4 ± 2.8 vs 2.4 ± 0.8 mM; ES, 1.7-2.8; 188 ± 11 vs 173 ± 8 bpm; ES, 0.9-1.5), with no differences at exhaustion. Time >95% HRmax was lower (P < 0.01) in UTR than that in TR (1.0 ± 1.1 vs 6.3 ± 2.9 min; ES, 3.1). Mean rates of muscle creatine phosphate utilization (16.5 ± 9.5 vs 4.3 ± 2.7 mmol·kg1 d.w·min-1), muscle lactate accumulation (16.8 ± 9.1 vs 4.2 ± 2.9 mmol·kg-1 d.w.·min-1), and glycogen breakdown (29.6 ± 14.2 vs 7.7 ± 5.4 mmol·kg-1 d.w.·min-1) were fourfold higher (P < 0.01; ES, 1.4-1.7) in UTR than those in TR. For UTR, correlations (P < 0.01) were observed between Yo-Yo IE2 performance and VO2max (r = 0.77), incremental treadmill test performance (r = 0.79), and muscle citrate synthase activity (r = 0.57) but not for TR (r = -0.12 to 0.50; P > 0.05). Conclusions: The Yo-Yo IE2 test was shown to possess high construct validity by showing large differences in performance, HR, and anaerobic metabolism between UTR and TR. In addition, VO2max seemed to be important for intermittent exercise performance in UTR but not for TR.

U2 - 10.1249/MSS.0000000000000377

DO - 10.1249/MSS.0000000000000377

M3 - Journal article

C2 - 24824774

SN - 0195-9131

VL - 47

SP - 100

EP - 108

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

IS - 1

ER -

The Yo-Yo IE2 test: Physiological response for untrained men versus trained soccer players

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