Heart rate as an indicator for exercise prescription for normal, overweight, and obese adolescents

Abstract

Abstract--This study aimed to investigate the relationship between heart rate (HR) predicted and VO 2 max using a CPET (cardiopulmonary exercise testing) among normal weight, overweight, and obese adolescents. The sample comprised 299 adolescents (142 boys), from Vitória (ES, Brazil), aged 10-14 years (12.6±1.4). Adolescents were classified into normal weight (n=236), overweight (n=34), and obese (n=29). Adolescents were subjected to a CPET ramp protocol on a treadmill. It was observed that the reserve heart rate (HRres) was similar to the maximum recommended oxygen uptake (VO 2 ) for the maintenance and improvement of cardiorespiratory fitness. It was also observed that HRres can be used to control the intensity of exercise sessions in physical education classes independent of weight status. In conclusion, the relationship between the HR and VO 2 for adolescents is linear, allowing the level of intensity to be determined by the HRres proportion related with the correspondent %VO 2 max levels of intensity, according to BMIfor-age categories.

Metodología de entrenamiento aeróbico utilizado por profesionales de fitness

“…La intensidad del entrenamiento está directamente relacionada con el gasto de energía; por lo tanto, a medida que aumenta, hay un mayor reclutamiento de unidades motoras de los músculos involucrados en la acción, aumentando así la capitación de oxígeno linealmente, hasta alcanzar su capacidad máxima. La evaluación de la intensidad del ejercicio se puede definir por el porcentaje de consumo máximo de oxígeno (% vo 2 máx ), porcentaje de frecuencia cardíaca máxima (% hr), frecuencia cardíaca de reserva (% hr reserva) y gasto de actividad metabólica (met) (Garber et al, 2011;Gomes, Perez, Carletti y Marques, 2016).…”