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Related Concept Videos

Nature and Nurture01:10

Nature and Nurture

Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience, such as differences...
Major Hormones and Their Functions01:27

Major Hormones and Their Functions

Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
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Hormones and Bone Tissue01:17

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Cellular Adaptation II: Hypertrophy01:26

Cellular Adaptation II: Hypertrophy

Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy: physiological...
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Related Experiment Video

Updated: Jun 3, 2026

Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays
11:17

Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays

Published on: January 7, 2016

Growth hormone and physical performance.

Vita Birzniece1, Anne E Nelson, Ken K Y Ho

  • 1Pituitary Research Unit, Garvan Institute of Medical Research and Department of Endocrinology, St Vincent's Hospital, Sydney, NSW 2010, Australia.

Trends in Endocrinology and Metabolism: TEM
|March 23, 2011
PubMed
Summary
This summary is machine-generated.

Human growth hormone (GH) abuse is common in athletes, but evidence shows it does not improve strength or aerobic capacity. GH may enhance anaerobic performance but carries risks similar to acromegaly.

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Treatment of Ligament Constructs with Exercise-conditioned Serum: A Translational Tissue Engineering Model
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Treatment of Ligament Constructs with Exercise-conditioned Serum: A Translational Tissue Engineering Model

Published on: June 11, 2017

Related Experiment Videos

Last Updated: Jun 3, 2026

Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays
11:17

Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays

Published on: January 7, 2016

Treatment of Ligament Constructs with Exercise-conditioned Serum: A Translational Tissue Engineering Model
08:03

Treatment of Ligament Constructs with Exercise-conditioned Serum: A Translational Tissue Engineering Model

Published on: June 11, 2017

Area of Science:

  • Endocrinology
  • Sports Medicine
  • Exercise Physiology

Background:

  • Human growth hormone (GH) is frequently misused by athletes despite limited evidence of performance enhancement.
  • GH administration in healthy adults can increase lean body mass, potentially due to fluid retention.

Purpose of the Study:

  • To review the effects of GH on body composition and physical performance in healthy individuals and athletes.
  • To examine the risks associated with GH abuse in sports.

Main Methods:

  • Literature review of studies investigating GH effects on body composition and physical performance.
  • Analysis of data on GH's impact on strength, power, aerobic, and anaerobic exercise capacity.
  • Examination of adverse effects and long-term consequences of GH excess.

Main Results:

  • GH does not appear to enhance muscle strength, power, or aerobic exercise capacity in healthy adults or athletes.
  • Evidence suggests GH may improve anaerobic exercise capacity.
  • Long-term GH excess can lead to acromegaly-like symptoms, increasing morbidity and mortality.

Conclusions:

  • The performance benefits of GH in athletes are not well-supported by current evidence.
  • GH abuse poses significant health risks, including conditions mimicking acromegaly.
  • Further research is needed to clarify GH's precise role in physical performance and its long-term safety profile.