Growth hormone pulsatility profile characteristics following acute heavy resistance exercise.

@article{Nindl2001GrowthHP,
  title={Growth hormone pulsatility profile characteristics following acute heavy resistance exercise.},
  author={Bradley C. Nindl and Wesley C. Hymer and Daniel R. Deaver and William J. Kraemer},
  journal={Journal of applied physiology},
  year={2001},
  volume={91 1},
  pages={
          163-72
        }
}
This investigation examined the hypothesis that acute heavy resistance exercise (AHRE) would increase overnight concentrations of circulating human growth hormone (hGH). Ten men (22 +/- 1 yr, 177 +/- 2 cm, 79 +/- 3 kg, 11 +/- 1% body fat) underwent two overnight blood draws sampled every 10 min from 1700 to 0600: a control and an AHRE condition. The AHRE was conducted from 1500 to 1700 and was a high-volume, multiset exercise bout. Three different immunoassays measured hGH concentrations: the… Expand
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References

SHOWING 1-10 OF 43 REFERENCES
Hormonal and growth factor responses to heavy resistance exercise protocols.
TLDR
The data indicate that the release patterns observed are complex functions of the type of HREPs utilized and the physiological mechanisms involved with determining peripheral circulatory concentrations (e.g., clearance rates, transport, receptor binding). Expand
Impact of acute exercise intensity on pulsatile growth hormone release in men.
TLDR
The GH secretory response to exercise is related to exercise intensity in a linear dose-response pattern in young men, and deconvolution analysis revealed that increasing exercise intensity resulted in alinear increase in the mass of GH secreted per pulse and GH production rate. Expand
Effect of low and high intensity exercise on circulating growth hormone in men.
TLDR
A minimum duration of 10 min, high intensity exercise consistently increased circulating GH in adult males, and this increase occurred despite simultaneous increases in both IRI and glucose. Expand
Human growth hormone response to repeated bouts of aerobic exercise.
TLDR
It is concluded that the GH response to acute aerobic exercise is augmented with repeated bouts of exercise. Expand
Effects of endurance exercise on nocturnal hormone concentrations in males.
TLDR
Analysis indicated that a significant augmentation of the prolactin and thyroxine responses occurred, while concurrently an attenuation of the growth hormone and cortisol responses were observed, and no significant effects were found for the testosterone and luteinizing hormones responses. Expand
Endurance training amplifies the pulsatile release of growth hormone: effects of training intensity.
TLDR
The effects of intensity of run training on the pulsatile release of growth hormone (GH) were investigated in 21 eumenorrheic untrained women and no among- or within-group differences were observed for body weight. Expand
Alteration of pulsatile growth hormone secretion by growth-inducing exercise: involvement of endogenous opiates and somatostatin.
TLDR
The results are consistent with the conclusions that rapid growth, spontaneous or induced by exercise, is associated with increased GH pulse frequency and amplitude and decreased GH and PRL baseline concentrations in hamsters. Expand
Exercise and growth hormone: does one affect the other?
TLDR
The release of growth hormone is sensitive to many pharmacologic and physiologic stimuli, including exercise, and greater activation of anaerobic glycolysis and lactate formation increases the amount of GH released. Expand
Pulsatile intravenous growth hormone (GH) infusion to hypophysectomized rats increases insulin-like growth factor I messenger ribonucleic acid in skeletal tissues more effectively than continuous GH infusion.
TLDR
Pulsatile GH treatment is more effective than continuous GH infusion in increasing IGF-I mRNA levels in rib growth plate and skeletal muscle, i.e. two major target organs for the anabolic effects of GH. Expand
Bed rest suppresses bioassayable growth hormone release in response to muscle activity.
TLDR
It is demonstrated that the ambulatory state of an individual can have a major impact on the release of BGH, but not IGH, in response to a single bout of muscle activity. Expand
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