23 Acute Endocrine Responses in Elite Junior Weightlifters

Short-Term Effects of Strength and Plyometric Training on Sprint and Jump Performance in Professional Soccer Players

“…Furthermore, it has been stated that maximal strength is the overall most important factor in power output when movement duration is longer than 250 milliseconds (34) Fry et al (12) and Wilson et al (39) reported no significant increase in sprint acceleration or velocity after training programs involving essentially vertical plyometric exercises and weight training in trained subjects. This may be related to the lack of specific sprint training during the intervention period.…”

Effect of acute postexercise ethanol intoxication on the neuroendocrine response to resistance exercise

“…For the exercise-only treatment (Ex), this effect extended to 20-40 min after exercise. Although a variety of resistance exercise protocols have resulted in increased peripheral concentrations of cortisol (15,17), a protocol similar to that used in the present study (5 RM, 1-min rest) did not have this effect compared with other protocols in men (20) but did have this effect compared with similar protocols in women (21). Differences in response may be attributed to vari- ables such as the loading and the number of repetitions per set, the duration of the rest intervals, the number of sets, the choice of exercises, the amount of muscle mass involved, or the training status of the subject.…”

“…Ethanol ingestion results in elevated circulating cortisol concentrations, and there is apparently a doserelated effect (13, 32). Although there is evidence to suggest that the effect of ethanol on this axis occurs via corticotropin-releasing hormone (CRH) secretion from hypothalamic neurons (35) via adrenergic stimulation of higher centers (41), there is evidence to indicate that ethanol's effect is instead mediated via an increase in ACTH release from the anterior pituitary gland (18,33).In the pituitary-gonadal axis of men, testosterone is thought to have a role in the adaptation to resistance exercise, inasmuch as its serum concentration is increased in response to various resistance exercise protocols (15,17,22). Serum testosterone concentration is lowered for up to several hours after acute ethanol administration (18,29).…”

“…With regard to the pituitary-adrenocortical axis, increased postexercise cortisol concentrations have been shown consequent to acute resistance exercise (15,17). Ethanol ingestion results in elevated circulating cortisol concentrations, and there is apparently a doserelated effect (13,32).…”

“…In the pituitary-gonadal axis of men, testosterone is thought to have a role in the adaptation to resistance exercise, inasmuch as its serum concentration is increased in response to various resistance exercise protocols (15,17,22). Serum testosterone concentration is lowered for up to several hours after acute ethanol administration (18,29).…”