THE EFFECT OF STEROID HORMONES ON PHYSIOLOGICAL PARAMETERS AND HUMAN BODY COMPOSITION DURING SHORT-TERM SIMULATION OF SPACE FLIGHT FACTORS
Table 1 - Body composition, physiological and hormonal parameters of test-subjects in different series of research
Parameter, units of measurement | N=8 | Isolation (n=12) | ||
Placebo | HGMF | PHE- | PHE+ | |
Body mass, kg | 78,7±3,6 | 78,4±3,7 | 68,2±7,2 | 68,1±5,0 |
Body mass index, kg/m2 | 24,2±1,0 | 24,1±1,1 | 23,9±1,9 | 22,4±1,1 |
APs, mm Hg | 117±4 | 117±2 | – | – |
APd, mm Hg | 71±2 | 71±2 | – | – |
Heart rate, beats/minute | 58±3 | 57±3 | – | – |
Cardiac output, L/minute | 4,4±0,3 | 4,3±0,2 | – | – |
Extracellular fluid, L | 20,4±0,9 | 20,8±0,9 | 17,9±1,7 | 18,2±1,4 |
Extracellular fluid, % to background | 100±2 | 102±3 | 100±1 | 103±1 |
Cellular fluid, L | 25,9±1,1 | 26,2±1,0 | 24,9±2,1 | 22,6±1,6 |
Cellular fluid, % to background | 102±2 | 104±2 | 98±1 | 101±1* |
Lean body mass, kg | 63,3±2,6 | 64,2±2,6 | 58,4±5,2 | 55,8±4,0 |
Lean body mass, % to background | 101±1 | 103±2 | 99±1 | 102±1* |
Body cell mass, kg | 38,9±1,5 | 39,4±1,3 | 30,3±2,2 | 35,8±1,7 |
Body cell mass, % to background | 106±4 | 108±4 | 100±1 | 101±1 |
Intracellular substance, kg | 24,4±1,3 | 24,9±1,5 | 28,1±3,1 | 20,0±2,3 |
Intracellular substance, % to background | 96±5 | 97±4 | 97±1 | 104±1* |
Dry lean body mass, kg | 17,0±0,7 | 17,2±0,7 | 15,7±1,4 | 15,0±1,1 |
Dry lean body mass, % to background | 101±1 | 103±2 | 99±1 | 102±1* |
REE, MJ/m2/day | 4,0±0,1 | 4,0±0,1 | 4,2±0,3 | 4,0±0,2 |
Resting VО2, L/minute | 0,26±0,02 | 0,27±0,01 | – | – |
Respiratory coefficient | 0,92±0,05 | 0,89±0,04 | – | – |
Cortisol, nmol/L | 149±15 | 167±52 | 369±51 | 467±29 |
Cortisol in saliva, nmol/L | 70,1±5,5 | 93,9±20,8 | – | – |
Aldosterone, pmol/L | 141±36 | 187±42 | 968±159 | 801±94 |
Aldosterone, % to background | 103±30 | 129±38 | 138±17 | 89±2* |
Testosterone, nmol/L | – | – | 12,1±3,6 | 9,1±3,4 |
Testosterone, % to background | – | – | 116,8±8,0 | 87,3±5,5* |
Free testosterone, pmol/L | 226±43 | 248±37 | – | – |
Dihydrotestosterone, nmol/L | 1,7±0,1 | 1,6±0,2 | – | – |
Estradiol, pmol/L | 296±55 | 309±49 | – | – |
Progesterone, nmol/L | 0,48±0,23 | 0,30±0,09 | – | – |
HGMF – hypogeomagnetic field; PHE – physical exercises in isolation (range); * - significant difference between PHE- and PHE+ (p <0,05); APs – arterial pressure systolic; APd – arterial pressure diastolic; REE – rest energy expenditure; VО2 – oxygen demand; Numbers in bold – means are higher than physiological norm; Mean±S.E.M.