TY  - JOUR
AU  - Tanskanen, Minna M.
A2  - Tanskanen, Minna M.
A2  - Kyröläinen, Heikki
A2  - Uusitalo, Arja L.
A2  - Huovinen, Jukka
A2  - Nissilä, Juuso
A2  - Kinnunen, Hannu
A2  - Atalay, Mustafa
A2  - Häkkinen, Keijo
DB  - BISp
DP  - BISp
KW  - Globulin, hormonbindendes
KW  - Hormonhaushalt
KW  - Kortisol
KW  - Militärsport
KW  - Sexualhormon
KW  - Sportmedizin
KW  - Trainingswissenschaft
KW  - Übertraining
LA  - eng
TI  - Serum sex hormone-binding globulin and cortisol concentrations are associated with overreaching during strenuous military training
TT  - Die Konzentrationen des Serum-Sexualhormonbindungsglobulins und des Kortisols stehen mit leichtem Übertraining während intensiven militärischen Trainings in Zusammenhang
PY  - 2011
N2  - The purpose was (a) to study the effect of an 8-week Finnish military basic training period (BT) on physical fitness, body composition, mood state, and serum biochemical parameters among new conscripts; (b) to determine the incidence of overreaching (OR); and (c) to evaluate whether initial levels or training responses differ between OR and noOR subjects. Fifty-seven males (19.7 ± 0.3 years) were evaluated before and during BT. Overreaching subjects had to fulfill 3 of 5 criteria: decreased aerobic physical fitness (V̇O2max), increased rating of perceived exertion (RPE) in 45-minute submaximal test at 70% of V̇O2max or sick absence from these tests, increased somatic or emotional symptoms of OR, and high incidence of sick absence from daily service. V̇O2max improved during the first 4 weeks of BT. During the second half of BT, a stagnation of increase in V̇O2max was observed, basal serum sex hormone-binding globulin (SHBG) increased, and insulin-like growth factor-1 and cortisol decreased. Furthermore, submaximal exercise-induced increases in cortisol, maximum heart rate, and postexercise increase in blood lactate were blunted. Of 57 subjects, 33% were classified as OR. They had higher basal SHBG before and after 4 and 7 weeks of training and higher basal serum cortisol at the end of BT than noOR subjects. In addition, in contrast to noOR, OR subjects exhibited no increase in basal testosterone/cortisol ratio but a decrease in maximal La/RPE ratio during BT. As one-third of the conscripts were overreached, training after BT should involve recovery training to prevent overtraining syndrome from developing. The results confirm that serum SHBG, cortisol, and testosterone/cortisol and maximal La/RPE ratios could be useful tools to indicate whether training is too strenuous. Verf.-Referat
L2  - https://dx.doi.org/10.1519/JSC.0b013e3181c1fa5d
DO  - 10.1519/JSC.0b013e3181c1fa5d
SP  - S. 787-797
SN  - 1064-8011
JO  - Journal of strength and conditioning research
IS  - 3
VL  - 25
M3  - Gedruckte Ressource
M3  - Elektronische Ressource (online)
ID  - PU201105004744
ER  -