title: Heart rate and blood lactate correlates of perceived exertion during small-sided soccer games.
abstract: The rating of perceived exertion (RPE) could be a practical measure of global exercise intensity in team sports. The purpose of this study was to examine the relationship between heart rate (%HR(peak)) and blood lactate ([BLa(-)]) measures of exercise intensity with each player's RPE during soccer-specific aerobic exercises. Mean individual %HR(peak), [BLa(-)] and RPE (Borg's CR 10-scale) were recorded from 20 amateur soccer players from 67 soccer-specific small-sided games training sessions over an entire competitive season. The small-sided games were performed in three 4min bouts separated with 3min recovery on various sized pitches and involved 3-, 4-, 5-, or 6-players on each side. A stepwise linear multiple regression was used to determine a predictive equation to estimate global RPE for small-sided games from [BLa(-)] and %HR(peak). Partial correlation coefficients were also calculated to assess the relationship between RPE, [BLa(-)] and %HR(peak). Stepwise multiple regression analysis revealed that 43.1% of the adjusted variance in RPE could be explained by HR alone. The addition of [BLa(-)] data to the prediction equation allowed for 57.8% of the adjusted variance in RPE to be predicted (Y=-9.49-0.152 %HR(peak)+1.82 [BLa(-)], p<0.001). These results show that the combination of [BLa(-)] and %HR(peak) measures during small-sided games is better related to RPE than either %HR(peak) or [BLa(-)] measures alone. These results provide further support the use of RPE as a measure of global exercise intensity in soccer.
authors: School of Leisure, Sport and Tourism, University of Technology, Sydney, Australia. Aaron.Coutts@uts.edu.au
authors: Aaron J
authors: AJ
authors: Coutts
authors: Ermanno
authors: E
authors: Rampinini
authors: Samuele M
authors: SM
authors: Marcora
authors: Carlo
authors: C
authors: Castagna
authors: Franco M
authors: FM
authors: Impellizzeri
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D016014:Linear Models; D018763:Muscle Fatigue / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology; D010465:Perception / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012647:Self-Assessment; D012916:Soccer / Q000502:physiology*; D055815:Young Adult
chemical_list: D019344:Lactic Acid