Table 3.

Results of nocturnal GH secretory parameters analyzed by deconvolution analysis for C and IT Standardbreds after a period of training, intensified training, and reduced training

Parameter	Training			Intensified Training			Reduced Training
		C	IT	C	IT	C	IT
Basal secretion, μg/l	0.014±0.017	0.014±0.025	0.008±0.005	0.010±0.008	0.008±0.006	0.009±0.009
Half-life, min	9.6±4.2	14.3±2.3‡	7.3±4.4*	15.2±1.2†‡	10.8±6.2	9.1±3.7§
Half-duration burst, min	3.1±0.6†	2.8±0.4	5.7±3.9	4.6±4.9	7.9±4.4*	3.3±1.6†
No. of bursts/8 h	8.6±2.9	10.6±0.9	9.4±2.7*	10.0±5.4	6.2±1.8†	9.2±4.1
Mean amplitude burst, μg·l−1·min−1	0.86±0.35	0.63±0.22	0.96±0.30	0.86±0.72	0.72±0.67	1.12±0.43
Mean mass burst, μg/l	2.8±1.1	1.9±0.8	6.3±5.8	2.5±1.2	4.5±2.8	4.3±3.5
Mean interval between bursts, min	49.4±15.1	39.1±7.6	51.6±15.1	49.1±25.2	70.4±28.9*	38.9±19.9†
8-h Total secretion (μg/l) = AUC	441±229	464±165	462±346	659±439	472±325	561±510
8-h basal secretion, μg/l	6.5±7.9	6.9±11.8	3.6±2.4	4.6±3.9	3.7±2.8	4.2±4.2
8-h pulsatile secretion, μg/l	434.7±228.2	456.7±154.0	458.8±346.6	654.4±439.9	467.9±326.4	557.0±506.0
Ratio pulsatile/total secretion, %	98.4±1.7	98.9±1.6	98.7±1.2	99.1±0.8	98.8±0.9	99.3±0.2
Approximate entropy	0.63±0.26	0.56±0.24	0.49±0.1*	0.82±0.29†	0.6±0.22	0.54±0.42*
IGF-I, ng/ml	164±69	157±42	189±74	162±17	145±57	179±33

Values are means ± SE. AUC, area unser the curve. Within a row, values with different superscripts differ significantly (P < 0.05).