Regulação Emocional em Psicoterapia: um guia para o terapeuta cognitivo-comportamental

Abstract

This study examined the effects of sustained high-intensity interval training (HIT) on the athletic performances and fuel utilisation of eight male en-durance-trained cyclists. Before HIT, each subject un-dertook three baseline peak power output _ W peak tests and two simulated 40-km time-trial cycling performance (TT 40) tests, of which the variabilities were 1.5 (1.3)% and 1.0 (0.5)%, respectively [mean (SD)]. Over 6 weeks, the cyclists then replaced 15 (2)% of their 300 (66) km · week –1 endurance training with 12 HIT sessions, each consisting of six to nine 5-min rides at 80% of _ W peak , separated by a 1-min recovery. HIT increased _ W peak from 404 (40) to 424 (53) W (P < 0.01) and im-proved TT 40 speeds from 42.0 (3.6) to 43.0 (4.2) km · h –1 (P < 0.05). Faster TT 40 performances were due to in-creases in both the absolute work rates from 291 (43) to 327 (51) W (P < 0.05) and the relative work rates from 72.6 (5.3)% of pre-HIT _ W peak to 78.1 (2.8)% of post-HIT _ W peak (P < 0.05). HIT decreased carbohydrate (CHO) oxidation, plasma lactate concentration and ventilation when the cyclists rode at the same absolute work rates of 60, 70 and 80% of pre-HIT _ W peak (P < 0.05), but not when they exercised at the same relative (% post-HIT _ W peak) work rates. Thus, the ability of the cyclists to sustain higher percentages of _ W peak in TT 40 perfor-mances after HIT was not due to lower rates of CHO oxidation. Higher relative work rates in the TT 40 rides following HIT increased the estimated rates of CHO oxidation from 4.3 to 5.1 g · min –1 .