Acute e ects of energy de cit induced by moderate-intensity exercise or energy-intake restriction on postprandial lipemia in healthy girls

Eleven healthy girls (mean(SD): age 12.1(0.6) years) completed three, 2-day conditions in a counterbalanced, crossover design. On day 1, participants either walked at 60(2)% peak oxygen uptake (energy deficit 1.55(0.20) MJ) (EX), restricted food energy intake (energy deficit 1.51(0.25) MJ) (ER) or rested (CON). On day 2, capillary blood samples were taken at pre-determined intervals throughout the 6.5 h postprandial period prior to, and following, the ingestion of standardised breakfast and lunch meals. Fasting plasma [TAG] was 29% and 13% lower than CON in EX (effect size (ES) = 1.39, P = 0.01) and ER (ES = 0.57, P = 0.02) respectively; EX was 19% lower than ER (ES = 0.82, P = 0.06). The EX total area under the [TAG] versus time curve was 21% and 13% lower than CON (ES = 0.71, P = 0.004) and ER (ES = 0.39, P = 0.06) respectively; ER was marginally lower than CON (-10%; ES = 0.32, P = 0.12). An exercise-induced energy deficit elicited a greater reduction in fasting plasma [TAG] with a trend for a larger attenuation in postprandial plasma [TAG] than an isoenergetic diet-induced energy deficit in healthy girls.