| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Research Abstract |
To investigate the effects of diet-induced thermogenesis (DIT) on heat loss responses, metabolic heat production and heat loss responses for 2 hours after a mixed meal (MM) and after no meal (control) were measured in twelve healthy women (age 19-20 years) in a climate chamber controlled at 25℃ and 40% RH. MM contained approximately 450 kcal (PFC : 14,15,71%). During the test, the metabolic heat production, skin blood flow on the chest and thigh (by laser Doppler imaging), skin temperatures at 14 points (by thermography) and oral temperature were measured at 0 (baseline), 40,80, and 120 min after the start of eating. Metabolic heat production increased by about 13% from baseline in MM, but not in control. Skin temperature was significantly higher in MM than control on the palm, dorsum of the hand, forearm, front of the upper arm, the chest and abdomen (p<0.05), but not at the other sites. Skin blood flow on the chest and thigh was significantly greater in MM than control (p<0.05). Oral temperature showed no significant difference between MM and control, decreasing by 0.2℃ over 2 hours in both cases. These results suggest that the caloric intake of 450 kcal enhanced the DIT (13%) and cutaneous vasodilation over 2 hours, but did not affect oral temperature. Regional differences were found in vasodilation, especially on the upper limbs.
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