Estratégia de prova, variação do humor e percepção de esforço em competição simulada de mountain bike cross country

Abstract

Despite described in many sports, pace strategy have not been described in mountain bike cross country race (XCO). Together, a better comprehension of cognitive and emotional responses contribute for a better understanding of sport. This dissertation will address these two issue on two different articles. The purpose of article 1 was to compare and classify the pace strategy adopted by subjects with different levels of performance on a simulated performance test (SPT). The purpose of article 2 was to describe the mood responses over a SPT, in addition to analyze the relationship of rating of perceived exertion (RPE) against distance covered and mean power output of each lap (WSPT). On the article 1, cyclists of regional and national level of XCO (n=20, 32,3±6,5 anos, 175.7±5,9cm, 69,2±5,6kg, 297,6±21,8Wmax e 64,9±4,8mL.kg-1.min-1), participated of a simulated race on a bike fixed at an electronic ergometer (Computrainer ), composed by 4 laps on a circuit. The athletes were divided in two groups (high and low) based on finish time and instructed to perform the circuit as fast as they can . No interaction was found to lap time (P=0,169) absolut power output (P=0,719) and relative (P=0,607), RPE (P=0,182) e heart rate (P=0,125). On the article 2, cyclists of regional and national level of XCO (n=19, 32,2±6,5 anos, 174.9±5,4cm, 67,9±6,3kg, 295,8±21,1Wmax e 65,3±4,9mL.kg.min), perform the same SPT described on the article1. On the last km of each lap was used the profile of mood state (POMS) and the CR100 scale to quantify the RPE. Were observed a decreased on the vigour (P=0,049) and an increase of fatigue (P=0,000) and total mood of disturbance (TMD) (P=0,014). In addition, we found a nearly perfection correlation between RPE and distance covered (r=0,999 P < 0,001), the %time (r=0,999 P=0,000) e a W (r=0,969 P=0,030). In conclusion our data suggests that performance level did not affect the strategy, and the mood was negatively affected in competitive level, confirmed by the rise of TMD as well as by the increase of POMS fatigue factor and PSE during the SPT.