Comparison of cardiopulmonary exercise testing performed with blood flow restriction vs. a traditional maximum test on e
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ORIGINAL ARTICLE
Comparison of cardiopulmonary exercise testing performed with blood flow restriction vs. a traditional maximum test on execution speed, ventilatory thresholds and maximum oxygen uptake Samuel Vargas Munhoz1 · Thiago Rozales Ramis1,2 · Leonardo Peterson dos Santos2 · Jerri Luiz Ribeiro2 Received: 15 July 2019 / Accepted: 10 April 2020 © Springer-Verlag Italia S.r.l., part of Springer Nature 2020
Abstract Objective To compare the responses of velocities, ventilatory thresholds and maximum oxygen uptake (VO2max) through a maximum incremental test with blood flow restriction (Tmax-BFR) and without restriction (Tmax-TRAD) in active young people. Methods This is a crossover study. Eight active young men (25 ± 4 years, 173 ± 0.07 cm, 77.19 ± 7.5 kg) were submitted to cardiopulmonary exercise test performed with or without vascular occlusion and evaluated in the entire test by ergospirometry. The first and second ventilatory threshold (VT1 and VT2), VO2max and the speeds to reach the thresholds were analyzed, as well as the exhaustion time for each condition was analyzed. Results VT1, VT2 and V O2max are similar in both conditions. However, to reach VT2 and VO2max the speeds in the TmaxBFR condition were significantly lower than in the Tmax-TRAD condition: 11.06 ± 1.56; 14.25 ± 1.03 km/h, p = 0.0002; 13.06 ± 2.04; 16.62 ± 1.30 km/h, p = 0.001. To reach VT1, there was a tendency to reduce the Tmax-BFR condition compared to Tmax-TRAD: 7.81 ± 0.92; 9 ± 1.36 km/h, p = 0.0645 d: 1024. Still, the exhaustion time was significantly shorter for the Tmax-BFR condition compared to Tmax-TRAD: 11:16 ± 0.10 min; 15:02 ± 0.05 min (Table 2) p = 0.007. Conclusion We identified reductions in velocities at ventilatory thresholds and VO2max when performed with occlusion. These data suggest the possible contribution of this resource to clinical practice, highlighting the achievement by individuals who do not tolerate high speeds on the treadmill or athletes who need to reduce speeds without decreasing exercise intensities. Keywords Restriction of blood flow · Kaatsu · Vascular restriction · Aerobic · Exercise
Introduction
* Samuel Vargas Munhoz [email protected] Thiago Rozales Ramis [email protected] Leonardo Peterson dos Santos [email protected] Jerri Luiz Ribeiro [email protected] 1
Laboratório de Fisiologia do Exercício e Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
Laboratório de Fisiologia do Exercício, IPA Centro Universitário Metodista, Porto Alegre, Brazil
2
According to the American College of Sports Medicine (ACSM), at least 150 min per week of moderate to highintensity exercise are needed to reduce the risk of chronic diseases and to ensure the maintenance and improvement of an individual’s health [1]. In some population groups such as the elderly, obese individuals, those in rehabilitation processes or athletes during planned low-load periods, it is not interesting to expose those individuals to high exercise int
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