Validity and reliability of maximum oxygen uptake on an Air Bike arm- and leg-ergometer

Air Bike ergometers have recently appeared and become popular among fitness. These ergometers combine the use of upper or lower limbs while remaining seated. Its characteristic is that of a system of external load imposed through air resistance which increases with the cadence imposed on the equipment. The present study aimed to evaluate the reliability of the ramp test and standard leg-cycle ergometer to assess maximum oxygen uptake (VO2max). For this purpose, 18 physically active young men, aged between 19 and 29 years (mean ± standard deviation= 21.78± 2.44), performed three maximal incremental ramp tests in random order: one test on a cycle ergometer and two tests on an Air Bike arm- and leg- ergometer (test and re-test) with cardiorespiratory measurements throughout the tests. VO2max and maximum heart rate (HRmax) were significantly higher in the Air Bike compared with the cycle ergometer (53.06± 8.72 vs 47.38± 9.15 mL/min/kg), 181.93± 10.20 vs 176.07± 5.28 bpm, p< 0.001; 95%CI 3.41–7.95; ES= 0.30 and p= 0.01; 95%CI 1.44–10.29; ES= 0.34, respectively for VO2max and HRmax). There were no differences between the two ergometers in the maximum respiratory exchange ratio (RER) and test duration (1.21± 0.13 vs 1.21± 0.13, 598.06± 37.28 vs 612.22± 86.40 s, p= 0.9; IC95% –0.05 – –0.05; ES= 0 and p= 0.4; 95%CI –46.12–17.79; ES= –0.11, respectively for RER and test duration). Both VO2max and HRmax showed to be reliable when assessed with the Air Bike ergometer. The maximal test carried out on the Air Bike is a reliable ergometer to assess VO2max and probably enables a higher VO2max as compared with a standard leg-cycle ergometer. Introdução: Os ergômetros Air Bike surgiram recentemente e rapidamente ficaram populares no fitness. Estes ergômetros combinam o uso de membros superiores ou inferiores, mesmo quando está sentado. Tem como característica um sistema de carga externa imposta através da resistência do ar que aumenta com a cadência imposta. Objetivo: o objetivo do presente estudo foi investigar se um teste de rampa incremental no ergômetro Air Bike é uma ferramenta válida e confiável para avaliar o consumo máximo de oxigênio (VO2max). Métodos: Para isso, dezoito homens jovens fisicamente ativos, com idades entre 19 e 29 anos (média ± desvio padrão = 21,78 ± 2,44), realizaram três testes de rampa incremental máxima em ordem aleatória: um teste em cicloergômetro e dois testes na Air Bike (teste e reteste) com medidas cardiorrespiratórias ao longo dos testes.