Correlation between Bruce laboratory test and field tests of YO-YO IRT2 and FIET in estimating aerobic power of elite futsal players

Khodayari, Bijan; Parnow, Abdolhossein; Tahmasebi, Worya; Firouzbakht, Karim

doi:10.48308/joeppa.2025.237820.1318

Correlation between Bruce laboratory test and field tests of YO-YO IRT2 and FIET in estimating aerobic power of elite futsal players

Document Type : Original Article

Authors

¹ Sport Sciences Faculty, Razi University, Kermanshah, Iran

² Sport Sciences Faculty. Razi University Kermanshah. Iran

10.48308/joeppa.2025.237820.1318

Abstract

Background and Purpose: Futsal is a high-intensity intermittent sport that its energy is supplied through both aerobic and anaerobic pathways. This reality in futsal, makes it important to assess and understand the physiological indicators such as lactate, heart rate, respiratory exchange ratio, and VO₂max in futsal players. Futsal players must have high aerobic fitness, and evaluating aerobic fitness indicators and their measurement techniques require understanding the related field tests. On the other hand, improving various physical aspects of futsal players requires accurate and specific evaluation of the futsal game, while, accurate evaluation requires accurate and specific tools for this sport. The aim of this study was to investigate the relationship between Bruce laboratory test (BLT) and two field tests (YO-YOIRT2 & FIET) used for determining aerobic power in elite futsal players.
Materials and Methods: Fifteen elite futsal players (age, 20.4±1.85 yrs; height, 1.78±0.0437 m; body mass, 66.33±7.13 kg; and BMI, 20.80±1.62 kg/m²) participated in this study. After familiarization with the study procedure, the main tests were performed on three different sessions, interspersed with one week. In these three sessions, all participants randomly performed the Bruce laboratory test on treadmill, the YO-YO IRT2 test, and the FIET test for measuring VO₂max, RER, blood lactate, and maximal heart rate (MHR) via gas analysis, lactometer, and heart rate monitoring (Polar system), respectively. Pearson correlation coefficient was used to determine relationship between the variables.
Results: Data analyses showed a significant positive correlation among the VO₂max factors (r=0.54, p=0.034), and RER (r=0.60, p=0.017) in the Bruce and YO-YO IRT2 tests, as well as blood lactate (r=0.60, p=0.017,) in the Bruce and FIET tests. Additionally, there was a significant positive correlation between the maximum heart rate factor for Bruce and YO-YO IRT2 (r=0.82, p=0.001), Bruce and FIET (r =0.95, p=0.001,), and Yo-Yo IRT2 and FIET (r=0.81, p=0.001). However, there was no significant correlation between the VO₂max and RER in the Bruce and FIET tests, and and in the YO-YO IRT2 and FIET tests. Additionally, there was no significant correlation between blood lactate in the Bruce and YO-YO IRT2 tests, and between the YO-YO IRT2 and FIET tests.
Conclusion: Based on the results of this study, it can be stated that the YO-YO IRT2 test is a valid and reliable test for assessing the aerobic capacity of elite male futsal players. Moreover, according to the correlations between blood lactate levels in the Bruce test and FIET, as well as the HRmax across all three laboratory tests (Bruce, Yo-Yo IRT2 and FIET), it can be stated that the physiological stress imposed by these tests on different body systems is similar in elite male futsal players.

Keywords

Main Subjects

Sports Physiology (General)

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