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Table 8 Results according to tests performed and subjects analyzed

From: Hormonal aspects of overtraining syndrome: a systematic review

Parameter FOR-induced athletes Previously affected subjects
Cortisol Normal results – 11 (68.8%)
Reduced levels – 5 (31.2%)
Total - 16
Normal results – 7 (50%)
Increased levels – 2 (14.3%)
Reduced levels – 5 (35.7%)
Total - 14
ACTH Normal results – 3 (100%) Normal results – 6 (46.2%)
Increased levels – 2 (15.3%)
Reduced levels – 5 (38.5%)
Total – 13
Serum catecholamines Normal results – 4 (66.7%)
Reduced levels – 2 (33.3%)
Total - 6
Normal results – 1 (20.0%)
Increased levels – 2 (40.0%)
Reduced levels – 2 (40.0%)
Total – 5
GH Normal results – 5 (100%)
Total - 5
Normal results – 1 (12.5%)
Increased levels – 2 (25.0%)
Reduced levels – 5 (62.5%)
Total - 8
T/c Normal results – 5 (62.5%)
Reduced levels – 3 (37.5%)
Total - 8
Normal results – 1 (33.3%)
Increased levels – 1 (33.3%)
Reduced levels – 1 (33.3%)
Total - 3
SHBG - Increased levels – 1 (100%)
IGF-1 Normal results – 1 (50.0%)
Reduced levels – 1 (50.0%)
Total - 2
Normal results – 1 (33.3%)
Increased levels – 2 (66.7%)
Total - 3
Free T Normal results – 1 (50.0%)
Increased levels – 1 (50.0%)
Total - 2
Reduced levels – 1 (100%)
Salivary C - Reduced levels – 2 (100%)
Salivary T - Increased levels – 1 (50.0%)
Reduced levels – 1 (50.0%)
Total T Normal results – 11 (78.6%)
Increased levels – 1 (7.1%)
Reduced levels – 2 (14.3%)
Total - 14
Normal results – 1 (33.3%)
Reduced levels – 2 (66.7%)
Total - 3
Insulin Normal results – 6 (85.7%)
Reduced levels – 1 (14.3%)
Total - 7
Normal results – 4 (80.0%)
Reduced levels – 1 (20.0%)
Total - 5
NUC Increased levels – 1 (25.0%)
Reduced levels – 3 (75.0%)
Total - 4
Normal results – 2 (100%)
IGFBP-3 - Reduced levels – 1 (100%)
IGF-1/IGFBP-3 - Increased levels – 1 (100%)
Prolactin Normal results – 4 (66.7%)
Reduced levels – 2 (33.3%)
Total - 6
Normal results – 1 (50.0%)
Reduced levels – 1 (50.0%)
Total - 2
LH Normal results – 6 (85.7%)
Reduced levels – 1 (14.3%)
Total – 7
-
FSH Normal results – 4 (80.0%)
Reduced levels – 1 (20.0%)
Total - 5
-
Aldosterone Normal results – 1 (16.7%)
Increased levels – 2 (33.3%)
Reduced levels – 3 (50.0%)
Total - 6
-
DHEA-S Normal results – 1 (100%) -
Peptide F - Normal results – 1 (100%)
Fertility Reduced levels – 1 (100%) -
TSH Normal results – 4 (100%) -
T4 L Normal results – 2 (100%) -
T3 L Normal results – 2 (100%) -
16 h salivary C Increased levels – 1 (100%) -
Beta2 muscle receptor Reduced levels – 1 (100%) -
Total number of studies 21 (55.3%) 17 (44.7%)