Abstract
The primary aim of this study was to compare the measured oxygen consumption (Measured-VO2) in a simulated futsal game (S-Game) with the estimated oxygen consumption (Estimated-VO2) through a regression equation between heart rate (HR) and oxygen consumption (VO2) (HR-VO2) in treadmill running, and a secondary aim was to calculate the total energy expenditure (EE) in S-Game. Ten professional players (22.20 ± 3.22 years) were evaluated. HR-VO2 was determined individually in the continuous test on the treadmill (ContTest). The Measured-VO2 in S-Game was compared with the Estimated-VO2 in the ContTest. Alactic and lactic pathways were estimated by VO2. The Estimated-VO2 presented no statistically significant difference with the Measured-VO2, using the paired t-test (p = 0.38). However, the correlation between Estimated- and Measured-VO2 was very weak (r = −0.05), and it presented poor agreement (concordance correlation coefficient = −0.04). In addition, a Bland–Altman plot presented bias of −2.8 ml/kg/min and individual difference as large as 19 ml/kg/min. The HR-VO2 determined by the ContTest was not a good individual predictor of VO2. The high intensity and intermittent nature of the futsal game possibly caused dissociation in the HR-VO2 relationship. ContTest is not recommended for estimating VO2 and calculating individual EE in the futsal game. This is recommended only for the group mean. The total EE in S-Game was 13.10 ± 1.25 kcal.min−1 (10.81 ± 1.57 metabolic equivalents). The contributions from the metabolic pathways were as follows: aerobic (93%), alactic (5%), and lactic (2%).
Highlights
The linearity of the relationship between heart rate (HR) and oxygen consumption (VO2) (HR-VO2) is observed in progressive continuous exercise (Achten and Jeukendrup, 2003)
The primary objective of this study was to compare measured oxygen consumption (Measured-VO2) in a simulated futsal game (S-Game) with the estimated oxygen consumption (Estimated-VO2) through a regression equation between HR and VO2 obtained in the continuous test on the treadmill (ContTest), and the secondary objective was to determine the total EE in SGame
When comparing the slope averages of the linear regression equation generated by the HR-VO2 in the ContTest (0.48 ± 0.12) and S-Game (0.28 ± 0.21), significant differences were observed between the slopes (p = 0.007)
Summary
The linearity of the relationship between heart rate (HR) and oxygen consumption (VO2) (HR-VO2) is observed in progressive continuous exercise (Achten and Jeukendrup, 2003). The contribution of the alactic anaerobic pathway from adenosine triphosphate–creatine phosphate (ATP–CP) can be made by calculating the fast component of excess postexercise oxygen consumption (EPOC) (Margaria et al, 1933; Beneke et al, 2002; Bertuzzi et al, 2007), while the EE of the lactic anaerobic pathway can be estimated through the O2 equivalent for [La−] (Di Prampero and Ferretti, 1999) These two procedures have been adopted to estimate EE from the anaerobic pathways and to calculate total EE in different sports, such as in tae kwon do, climbing, rowing, and table tennis (Bertuzzi et al, 2007; de Campos Mello et al, 2009; Campos et al, 2012; Zagatto et al, 2016). EE from the aerobic pathway has not yet been used in the futsal game
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
