european college of sport science

PP-BM04 Biomechanics 4
Kvorning T, Andersen M, Brixen K, Madsen K. Suppression of endogenous testosterone production attenuates the response to strength
training: a randomized, placebo controlled, and blinded intervention study. Am J Physiol Endocrinol Metab. 291(6): E1325-1332. 2006
Chiodini I, Torlontano M, Carnevale V, Trischitta V, Scillitani A. Skeletal involvement in adult patients with endogenous hypercortisolism. J
Endocrinol Invest. 31(3): 267-276. 2008.
THE CHANGES OF THYROID HORMONE AND STIMULATING THYROID HORMONE AFTER AEROBIC RUNNING EXERCISE
SHAHSAVA, A., POURVAGHAR, M.J.
ISLAMI AZAD UNIVERSITY OF TEHRAN GHARB, DEPARTMENT OF PHYSICAL EDUCATION, FACULTY OF HUMANITIES, UNIVERSITY OF KASHAN,
KASHAN, I. R. IRAN
Triiodothyronine (T3) and thyroxine (T4) are both secreted by the thyroid gland in response to thyroid-stimulating hormone (TSH) secreted
by the anterior pituitary gland. This research has been conducted in order to study the changes of secretion of thyroid hormone i.e. (T4),
(T3), and (TSH) following an aerobic physical activity. A group of 10 male university athletes with over three years experience in different
fields of sport participated in this semi- experimental research. The obtained average and standard deviations of factors such as age,
height, weight and body mass index (BMI) are as follows: (23.1±1.65), (171.1±4.51), (68.5±4.8) and (21.4±1.1). The exercise training of this
research consisted of 20 minutes of running around the track and field, each being 10 rounds in two minutes.
The results showed that aerobic activities did not have any significant effect on amount of T3 and TSH secretion, although the results
proved a significant difference in concentration level of serum T4 after 20 minutes (4000 m) aerobic physical activity (p = 0.002). So, it
seems that aerobic activities can have different reactions on the secretion of thyroid hormone while factors like hematocrit, plasma decrease,
as well as changes in PH of blood and also mental conditions may lead to a significant change in concentration of hormone.
References:
1. Giorgio Delbello Hormonal responses to a long duration exploration in a cave of 700 m depth Eur J Appl Physiol (2007) 100:71–78
2. Holly M. Brown-Borg Hormonal regulation of longevity in mammals Ageing Research Reviews 6 (2007) 28–45
STEROID PROFILE CHANGES AFTER SUBMAXIMAL EXERCISE IN TRAINED MALES
MUÑOZ, D., TORIBIO, F., OLCINA, G., TIMÓN, R., ROBLES, M.C., SAYAVERA, J., MAYNAR, M.
UNIVERSITY OF EXTREMADURA
Some research has shown that exercise can induce physiological stress which alter hormonal profile. Urinary excretion of these hormones
and its metabolites can be used in order to evaluate physical exercise load. Testosterone and its metabolites as well as suprarenal
androgens are in relation with anabolic status, while cortisol´s metabolites and cortisone are determined for assess catabolic status
PURPOSE: the aim of this study is to analyze if submaximal efforts (75-80% VO2 max) provokes changes in urinary steroids profile in
endurance trained subjects.METHODS: Twenty male cyclists participated in this study (age: 23,83 2,32 years; height: 176,00
 3,65 cm; weight: 66,94  3,59 kg; body fat %: 8,57  1,22; VO2 max: 65,53 ± 9,35 ml/kg/min). The trial performed
was a submaximal ergometric test during 30 min, at 75-80% VO2 max. Urine samples were collected before and after the text.
All tests were conducted in a physiology laboratory, room temperature was 23 - 25ºC, humidity was 45 - 55%. Urinary samples were
analyzed by gas chromatography techniques in order to determine testicular androgens, suprarenal androgens and corticosteroids
values. Sample urinary density was in the range of 1,005-1,025 g/mL, pH was between the normal range of 4,7-7,8. Creatinine levels of
all samples were determined in order to report the steroid concentrations relative to this urinary parameter. The Wilcoxon test was performed
for statistical analysis. A p