Metabolic response to oral glucose tolerance test performed in neutral and warm environmental temperature

Figures & data

Table 1. Characteristics of the participants.

	All participants (n = 19)		Women (n = 7)		Men (n = 12)
	Mean	SD	Mean	SD	Mean	SD
Age and anthropometry
Age (years)	20.2	1.8	20.0	1.4	20.3	1.8
Height (m)	1.74	0.11	1.63	0.08^a	1.79	0.09
Body mass (kg)	69.6	13.8	55.7	10.1^a	76.5	12.5
Body mass index (kg/m^2)	22.8	2.9	20.8	2.7^a	23.8	2.9
Metabolic profile
Body fat (%)	14.1	6.9	19.1	5.0^a	11.5	6.4
Physical activity (METs.min/week)	2885	1489	2916	1445	2859	1282
Total cholestérol (mmol/L)	3.9	0.7	4.1	0.8	3.8	0.5
Triglycerides (mmol/L)	0.8	0.5	0.7	0.2	0.9	0.4
HDL cholestérol (mmol/L)	1.5	0.4	1.7	0.3	1.4	0.4
LDL cholestérol (mmol/L)	2.1	0.5	2.2	0.6	2.0	0.4

^a Significant difference between women and men.

Figure 1. Glucose (mmol/l) (A) and insulin (pmol/l) (B) responses during the session at 22 °C ambient temperature (white triangles, dashed line), and during the session at 31 °C (black triangles, solid line). A. Time p < .001; temperature p = .028 (as indicated by *); temperature × time p = .12. (B) Time p < .0001; temperature p = .17; metabolic level × temperature p = .21.

Figure 2. Cortisol (nmol/l) (A) and GH (µg/l) (B) responses during the session at 22 °C ambient temperature (white triangles, dashed line), and during the session at 31 °C (black triangles, solid line). (A) Time p < .001; temperature p = .001; temperature × time p = .007. *Significant temperature effect at different sampling times, from the post-hoc tests. (B) Time p = .005; temperature p = .60; temperature × time p = .46.

Figure 3. Pancreatic peptide (µg/l) (A) and IL-6 (ng/l) (B) responses during the session at 22 °C ambient temperature (white triangles, dashed line), and during the session at 31 °C (black triangles, solid line). (A) Time p = .38; temperature p = .53; temperature × time p = .23. (B) Time p < .001; temperature p = .043 (as indicated by *); temperature × time p = .68.