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Titolo:
Effects of heavy-resistance training on hormonal response patterns in younger vs. older men
Autore:
Kraemer, WJ; Hakkinen, K; Newton, RU; Nindl, BC; Volek, JS; McCormick, M; Gotshalk, LA; Gordon, SE; Fleck, SJ; Campbell, WW; Putukian, M; Evans, WJ;
Indirizzi:
Ball State Univ, Human Performance Lab, Muncie, IN 47306 USA Ball State Univ Muncie IN USA 47306 Performance Lab, Muncie, IN 47306 USA Penn State Univ, Ctr Sports Med, Noll Physiol Res Ctr, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 r, University Pk, PA 16802 USA Univ Jyvaskyla, Dept Biol Phys Activ, Jyvaskyla, Finland Univ Jyvaskyla Jyvaskyla Finland pt Biol Phys Activ, Jyvaskyla, Finland So Cross Univ, Sch Exercise Sci & Sport Management, Lismore, NSW, Australia So Cross Univ Lismore NSW Australia Management, Lismore, NSW, Australia Univ Arkansas Med Sci, Donald W Reynolds Dept Geriatr, Nutr Metab & Exercise Lab, N Little Rock, AR 72114 USA Univ Arkansas Med Sci N Little Rock ARUSA 72114 ittle Rock, AR 72114 USA Colorado Coll, Dept Sport Sci, Colorado Springs, CO 80913 USA Colorado Coll Colorado Springs CO USA 80913 olorado Springs, CO 80913 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 87, anno: 1999,
pagine: 982 - 992
SICI:
8750-7587(199909)87:3<982:EOHTOH>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTENSITY CYCLE EXERCISE; GROWTH-FACTOR RESPONSES; MIDDLE-AGED MEN; ELDERLY MEN; TESTOSTERONE SECRETION; BIOLOGICAL ACTIONS; BODY-COMPOSITION; MUSCLE STRENGTH; SERUM HORMONES; FACTOR-I;
Keywords:
endocrine; aging; sarcopenia; strength; muscle; andropause; somatopause; growth factors;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
73
Recensione:
Indirizzi per estratti:
Indirizzo: Kraemer, WJ Ball State Univ, Human Performance Lab, Muncie, IN 47306 USA Ball State Univ Muncie IN USA 47306 Lab, Muncie, IN 47306 USA
Citazione:
W.J. Kraemer et al., "Effects of heavy-resistance training on hormonal response patterns in younger vs. older men", J APP PHYSL, 87(3), 1999, pp. 982-992

Abstract

To examine the adaptations of the endocrine system to heavy-resistance training in younger vs. older men, two groups of men (30 and 62 yr old) participated in a 10-wk. periodized strength-power training program. Blood was obtained before, immediately after, and 5, 15, and 30 min after exercise at rest before and after training and at rest at -3, 0, 6, and 10 wk for analysis of total testosterone, free testosterone, cortisol, growth hormone, lactate, and ACTH analysis. Resting values for insulin-like growth factor (IGF)-I and IGF-binding protein-3 were determined before and after training. A heavy-resistance exercise test was used to evaluate the exercise-induced responses (4 sets of 10-repetition maximum squats with 90 s of rest between sets). Squat strength and thigh muscle cross-sectional area increased for both groups. The younger group demonstrated higher total and free testosteroneand IGF-I than the older men, training-induced increases in free testosterone at rest and with exercise, and increases in resting IGF-binding protein-3. With training the older group demonstrated a significant increase in total testosterone in response to exercise stress along with significant decreases in resting cortisol. These data indicate that alder men do respond with an enhanced hormonal profile in the early phase of a resistance trainingprogram, but the response is different from that of younger men.

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Documento generato il 19/09/20 alle ore 09:06:27