Kalva-Filho, Carlos A.
Barbieri, Ricardo A.
De Andrade, Vitor L.
Bertucci, Danilo R.
Gobbi, Ronaldo B.
[5, 7, 6, 1]
Total Authors: 7
 Univ Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto, Postgrad Program Phys Educ & Sport, Av Bandeirantes, BR-14040907 Ribeirao Preto - Brazil
 Sao Paulo State Univ UNESP, Fac Sci, Bauru, SP - Brazil
 Ctr Univ Estacio Ribeirao Preto, Ribeirao Preto, SP - Brazil
 Ctr Univ UNIFAFIBE, Bebedouro - Brazil
 Sao Paulo State Univ UNESP, Postgrad Program Movement Sci, Rio Claro - Brazil
 Sao Paulo State Univ Unesp, Inst Biosci, Rio Claro - Brazil
 Univ Sao Paulo, Sch Phys Educ & Sports Ribeirao Preto, Ribeirao Preto - Brazil
Total Affiliations: 7
JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS;
Web of Science Citations:
BACKGROUND: Backward extrapolation technique (BE) was used to estimate VO, from postexercise measuring, eliminating oronasal mask (OM) during the efforts. Despite its advantage, literature presents discrepancy in applied methods. Thus, the first aim of this study was to compare different mathematical criteria to estimate values of VO2 during a supramaximal effort (VO2PEAK), while the second aim was to verify the effects of OM on cycling performance. METHODS: Twenty-four male cyclists (35 +/- 6 years, 81.3 +/- 8.9 kg, 180 +/- 6 cm) performed three days of tests, with at least 24 h of interval between each test. Firstly, a graded exercise test was applied to determine VO2max and your correspondent intensity (MAP). The second and the third day were destined to supramaximal efforts at 120% of MAP, performed with (Supra(mask)) and without (Supra(be)) oronasal mask (OM) in a randomized order. After Supra(be), OM was coupled, and BE was applied. Sixty-six value of VO2 were obtained based on a linear regression fitting. RESULTS: VO2peak can be estimated using different curve lengths. However, only curves between 20 and 60 s with extrapolation to 3 s or lesser shows at least one consistent criterion. The 60 s curve extrapoled to -3 s was the most accurate criteria (P=0.723; ES=-0.055; r=0.824; Bias(=-)0.36 and LoA-7.72 mL.kg.min(-1)). Performance was not impaired with OM and was similar in both condition (P=0.84, ES=0.04). CONCLUSIONS: We conclude that it was possible to accurately estimate VO2 values of a supramaximal effort without any respiratory apparatus with a time-efficient analysis. Therefore, we recommended the use of a 60 seconds VO2 curve analysis with a negative extrapolation for 3 seconds. (AU)