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Table 6 Hormone responses to acute stress (ME, TBE and ITT)

From: Hormonal aspects of overtraining syndrome: a systematic review

Parameter Quantity of studies (% of stimulation tests) Normal response Blunted response Exacerbated response
Cortisol 10 (62.5%) 5 (50.0%) 5 (50.0%) -
ACTH 7 (43.7%) 3 (42.9%) 4 (57.1%) -
GH 7 (43.7%) 3 (42.9%) 4 (57.1%) -
Total T 4 (25.0%) 3 (75.0%) 1 (25.0%) -
Plasma catecholamines 3 (18.7%) - 2 (66.7%) 1 (33.3%)
Prolactin 3 (18.7%) 1 (33.3%) 2 (67.1%) -
Insulin 3 (18.7%) 2 (67.1%) 1 (33.3%) -
LH 3 (18.7%) 3 (100.0%) - -
T/C 3 (18.7%) 1 (33.3%) 1 (33.3%) 1 (33.3%)
FSH 2 (12.5%) 2 - -
IGF-1 2 (12.5%) 1 - 1
LH 2 (12.5%) 2 - -
FSH 2 (12.5%) 2 - -
Salivary C 2 (12.5%) - 2 -
Salivary T 2 (12.5%) 1 1 -
Aldosterone 2 (12.5%) - 1 1
IGFBP-3 1 - 1 -
IGF-1/IGFBP-3 1 - - 1
Fertility 1 - 1 -
  1. NUC Nocturnal urinary catecholamines, T/C testosterone/cortisol ratio, T/SHBG testosterone/sex hormone binding globulin, T3 thyronine, T4 thyroxine, salivary C salivary cortisol, salivary T salivary testosterone, IGF-1/IGFBP-3 IGF-1/IGFBP3 ratio, fertility evaluation by semen analysis