| Popis: |
OBJECTIVES: To assess the effect of two preloads varying in protein, and self-reported physical activity (PA) on intake and brain activation (medial prefrontal cortex, mPFC) during eating of ice cream using functional near-infra red spectroscopy (fNIRS). METHODS: Twenty-eight participants (15 m, 13 f) attended two randomly assigned sessions, consuming either a high (HP, 28 grams) or low protein (LP, 2 grams) equicaloric 120 kcal preload. After 15 minutes, the fNIRS sensor was fitted and a 2 minutes “baseline” of viewing nature scene pictures was recorded. Participants were then presented with a bowl of vanilla ice cream and allowed to eat ad libitum for ten minutes. fNIRS scan data was denoised using a low pass time filter of 30 seconds, and then peak height for mPFC was analyzed. Participants recorded their habitual PA using the Rubenstein-Mortenson Short PA Questionnaire (PAQ-M 2011). After a frequency analysis of questionnaire total scores, the sample was divided into two groups based on a median split (those reporting less than 134 minutes of PA/week and those reporting 134 or greater minutes of PA/week. RESULTS: After controlling for BMI, the amount of ice cream consumed and total eating time observed under the LP condition differed significantly between the two groups (F = 14.8, P |
