Variáveis de controle do esforço em bicicleta aquática

Abstract

The aquatic bicycle Hidrocycle® has a system to generate resistance, called Evolution®, which consists of four rectangular troughs arranged perpendicularly moved by the rotation of the pedals. In this system there are two ways to control the load: 1) the pedaling speed (rpm) and 2) change in the frontal area of ducting (AF) in three levels, AF1, AF2 and AF3. To use more precise training, it is necessary to study the variables that act in the control of exercise intensity Evolution® system, heart rate (HR), perceived exertion (PE), muscle tension, oxygen consumption (VO2) and lactate concentration [La] in response to changes in RPM and AF. Therefore, the objectives of the study were: 1) The response of HR and PE in the progressive effort test performed at two depths, umbilicus and xiphoid process, 2) Identify VO2max, [La]max, and PE for each AF system Evolution ® protocol in progressive loads and to predict the VO2. For study 1, the sample consisted of 10 active men and women who underwent two progressive tests, one in depth. For study 2, 15 men, physically active performed area submitted to 3 maximal tests, one each with AF and a test of submaximal constant workload to predict the caloric expenditure and power generated. In study 1, the maximum values of HR and PE showed no statistically significant differences when comparing the two depths. The HR for stage RPM, presented from the third stage tend to be higher in height of the xiphoid process. In study 2, there was no difference in the maximum values of HR, VO2, [La] and PE in 3 AF studied in maximal test, but the values occur at different rpm, showing that the higher the AF, the less RPM to achieve the maximum for HR, VO2, [La1] and PE. Since the study incremental load predicted VO2 from the variables AF, RPM. We conclude that the system Evolution ® aquatic bicycle Hidrocycle ® to tailor the exercise overload, as well as the prediction equity to facilitate the implementation of the equipment in the various areas of physical training.