- Email: [email protected]
Post-lunch dip? Get out and stay out!
ARTICLE IN PRESS 282
Abstracts / Appetite 47 (2006) 281–282
Post-lunch dip? Get out and stay out! H.J.SMIT, Y.E.FINNEGAN, P.J.ROGERS. Department of Experimental Psychology,
University of Bristol, 8 Woodland Road, Bristol BS8 1TN, UK The ‘post-lunch dip’ or ‘mid-afternoon sleep gate’ was validated using real-time mood ratings. In a pilot study, participants were equipped with a personal digital assistant (PDA; Palm M105) and collected data under three conditions: normal (‘ad lib’) caffeine intake, early morning caffeine (coffee or tea with breakfast only), and full overnight+day-time caffeine abstinence. A 3-item mood questionnaire was completed once/h between waking up and going to bed; and every 20 min during the afternoon. The ratings were ‘alert/lively/energetic’, ‘drowsy/sluggish/ sleepy’ and ‘attentive/focused/able-to-concentrate’. On the basis of preliminary analyses, a ‘dip’ was defined as an unfavourable change of 10 or more on a scale from 0 ¼ ‘‘not at all’’ to 100 ¼ ‘‘extremely’’ for at least 2 of the 3 ratings. Highest peaks in ‘dip’ identification frequencies
were at 14:50 and 16:10 h or at 2 and 3 h after lunch. The main study repeated this procedure for the afternoon only, using the second of the previous caffeine intake regimes. In the laboratory, under controlled but ecologically valid conditions using personal office-type work, participants consumed one of three treatments upon ‘dip identification’: 330 ml of a ‘novel’ drink based on the Lucozade Energy formulation containing: caffeine (40 mg) and glucose (60 g); its sensorily matched placebo (no caffeine or glucose); nothing (no treatment). All three mood measures taken showed highly significant immediate and sustained improvements (still increasing 2 h after treatment) after the full drink compared to both placebo and nothing. Therefore, when experiencing a post-lunch or mid-afternoon dip, Lucozade Energy will ‘‘get you out’’ and ‘‘keep you out’’. doi:10.1016/j.appet.2006.07.003
Abstracts / Appetite 47 (2006) 281–282
Post-lunch dip? Get out and stay out! H.J.SMIT, Y.E.FINNEGAN, P.J.ROGERS. Department of Experimental Psychology,
University of Bristol, 8 Woodland Road, Bristol BS8 1TN, UK The ‘post-lunch dip’ or ‘mid-afternoon sleep gate’ was validated using real-time mood ratings. In a pilot study, participants were equipped with a personal digital assistant (PDA; Palm M105) and collected data under three conditions: normal (‘ad lib’) caffeine intake, early morning caffeine (coffee or tea with breakfast only), and full overnight+day-time caffeine abstinence. A 3-item mood questionnaire was completed once/h between waking up and going to bed; and every 20 min during the afternoon. The ratings were ‘alert/lively/energetic’, ‘drowsy/sluggish/ sleepy’ and ‘attentive/focused/able-to-concentrate’. On the basis of preliminary analyses, a ‘dip’ was defined as an unfavourable change of 10 or more on a scale from 0 ¼ ‘‘not at all’’ to 100 ¼ ‘‘extremely’’ for at least 2 of the 3 ratings. Highest peaks in ‘dip’ identification frequencies
were at 14:50 and 16:10 h or at 2 and 3 h after lunch. The main study repeated this procedure for the afternoon only, using the second of the previous caffeine intake regimes. In the laboratory, under controlled but ecologically valid conditions using personal office-type work, participants consumed one of three treatments upon ‘dip identification’: 330 ml of a ‘novel’ drink based on the Lucozade Energy formulation containing: caffeine (40 mg) and glucose (60 g); its sensorily matched placebo (no caffeine or glucose); nothing (no treatment). All three mood measures taken showed highly significant immediate and sustained improvements (still increasing 2 h after treatment) after the full drink compared to both placebo and nothing. Therefore, when experiencing a post-lunch or mid-afternoon dip, Lucozade Energy will ‘‘get you out’’ and ‘‘keep you out’’. doi:10.1016/j.appet.2006.07.003