Respuesta de la frecuencia cardiaca y consumo de oxígeno de atletas varones en competiciones de duatlón sprint

The oxygen consumption levels were estimated as a dependent variable by linear regression, from heart rate and oxygen consumption values of the effort test, showing a similar values in three segments (C1: 89.70% ± 6.11%; BK: 85.73% ± 6.89%, C2: 87.30% ± 8.67%). The lowest VO2% of BK with respect to C1 and C2 (p < .01) could be justified by lower use of total muscle mass and therefore a lower energy expenditure. The study showed that in sprint duathlon competitions the per cent load of the heart rate range between 92% and 95% of maximal heart rate and oxygen consumption between 85% and 89% of VO2max, confirming high levels of maximal aerobic power and heart rate. These data being considered as a reference for the use of sports training loads in continuous, variable continuous, and long interval extended types of sport.