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Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
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The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
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The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that...
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A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility.
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Endocrine Modulation in Long-Term Karate Practitioners.

Francisca M Vera1, Juan M Manzaneque1, Gabriel A Carranque2

  • 1Universidad de Málaga, Andalucía Tech, Departamento de Psicobiología y Metodología de las CC. del Comportamiento, Campus de Teatinos s/n, 29071 Málaga, Spain.

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Summary
This summary is machine-generated.

Long-term karate practice significantly modulates endocrine function, leading to lower cortisol and thyroid hormone levels in practitioners compared to controls. This suggests potential psychobiological and clinical benefits.

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Area of Science:

  • Endocrinology
  • Sports Science
  • Psychobiology

Background:

  • Karate is a popular martial art for self-defense and achieving physical/mental balance.
  • Limited research exists on the specific psychobiological effects of karate, especially on the endocrine system.

Purpose of the Study:

  • To investigate the effects of long-term karate practice on hormonal parameters.
  • To examine the influence of karate on the Hypothalamic-Pituitary-Adrenal (HPA) and Hypothalamic-Pituitary-Thyroid (HPT) axes.

Main Methods:

  • Study included 22 healthy volunteers: 12 karate practitioners (≥3 years experience) and 10 controls.
  • Blood samples were collected for hormonal analysis.
  • The Mann-Whitney U test was used to compare hormonal levels between groups.

Main Results:

  • Karate practitioners exhibited significantly lower levels of cortisol compared to the control group.
  • Thyroid hormone levels were also significantly lower in the karate group versus controls.

Conclusions:

  • Long-term karate practice is associated with significant endocrine modulation.
  • These findings suggest potential psychobiological and clinical implications.
  • Further research is warranted to confirm results and explore karate's use as a psychosomatic intervention.