PMID- 18725427
OWN - NLM
STAT- MEDLINE
DCOM- 20090113
LR  - 20131121
IS  - 1534-7796 (Electronic)
IS  - 0033-3174 (Linking)
VI  - 70
IP  - 7
DP  - 2008 Sep
TI  - Glycemic instability and spontaneous energy intake: association with 
      knowledge-based work.
PG  - 797-804
LID - 10.1097/PSY.0b013e31818426fa [doi]
AB  - OBJECTIVE: To further document the impact of knowledge-based work (KBW) on 
      spontaneous energy intake and glucose homeostasis. METHODS: We used a 
      within-subjects experimental design, in which each participant was engaged in 
      each of the three 45-minute conditions followed by an ad libitum buffet, 1) 
      resting in a sitting position; 2) reading a document and writing a summary; or 3) 
      performing a battery of computerized tests. Fourteen female students (mean age: 
      22.8 +/- 2.3 years, mean body mass index: 22.4 +/- 2.5 kg/m(2)) were recruited to 
      participate. Plasma glucose, insulin, and cortisol levels at seven time-points, 
      and appetite sensation markers were measured at each experimental condition. 
      RESULTS: The mean ad libitum energy intake after the reading-writing and the 
      automated test-battery conditions exceeded that measured after rest by 848 kJ and 
      1057 kJ, respectively (p < .05). No specific dietary preference was detected, as 
      reflected by the comparable percent of energy from each macronutrient in the 
      three conditions. No significant difference in appetite sensation markers was 
      observed among the three conditions. Mean cortisol level over 45 minutes in the 
      two KBW conditions was significantly higher (p < .05) compared with the control 
      condition. Finally, a significant increase in variations in plasma glucose and 
      insulin levels was observed as compared with the control condition (p < .01). 
      CONCLUSIONS: This study showed that KBW acutely induces an increase in 
      spontaneous energy intake, and promotes an increased fluctuation in plasma 
      glucose and insulin levels. This study contributes to the documentation of a new 
      risk factor for a positive energy balance, with the potential to lead to 
      overweight in the long-term.
FAU - Chaput, Jean-Philippe
AU  - Chaput JP
AD  - Division of Kinesiology (PEPS), Department of Social and Preventive Medicine, 
      Laval University, Quebec City, Quebec, Canada, G1K 7P4.
FAU - Drapeau, Vicky
AU  - Drapeau V
FAU - Poirier, Paul
AU  - Poirier P
FAU - Teasdale, Normand
AU  - Teasdale N
FAU - Tremblay, Angelo
AU  - Tremblay A
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080825
PL  - United States
TA  - Psychosom Med
JT  - Psychosomatic medicine
JID - 0376505
RN  - 0 (Blood Glucose)
RN  - 0 (Insulin)
RN  - WI4X0X7BPJ (Hydrocortisone)
SB  - IM
MH  - Adult
MH  - Appetite/physiology
MH  - Blood Glucose/*analysis
MH  - Cognition/physiology
MH  - Computers
MH  - Diet Records
MH  - Energy Intake/*physiology
MH  - Environmental Monitoring
MH  - Feeding Behavior/physiology
MH  - Female
MH  - Heart Rate/physiology
MH  - Humans
MH  - Hydrocortisone/*blood
MH  - Insulin/*blood
MH  - Psychomotor Performance/*physiology
MH  - Reading
MH  - Rest/physiology
MH  - Students
MH  - Task Performance and Analysis
MH  - Thinking/*physiology
MH  - Workload/statistics & numerical data
MH  - Young Adult
EDAT- 2008/08/30 09:00
MHDA- 2009/01/14 09:00
CRDT- 2008/08/30 09:00
PHST- 2008/08/30 09:00 [pubmed]
PHST- 2009/01/14 09:00 [medline]
PHST- 2008/08/30 09:00 [entrez]
AID - PSY.0b013e31818426fa [pii]
AID - 10.1097/PSY.0b013e31818426fa [doi]
PST - ppublish
SO  - Psychosom Med. 2008 Sep;70(7):797-804. doi: 10.1097/PSY.0b013e31818426fa. Epub 
      2008 Aug 25.