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Related Concept Videos

Testes: Histology01:27

Testes: Histology

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A tough, fibrous membrane, the tunica albuginea, covers the testes, extending inward to form fibrous partitions or septa, dividing them into internal compartments called lobules. Each lobule has 1 to 3 tightly coiled seminiferous tubules where sperm production occurs. These tubules merge into a tubular network at the back of the testis, known as the rete testis. It connects to 15 to 20 efferent ductules, leading to the epididymis.
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Exercise and Muscle Performance01:27

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
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Testes: Gross Anatomy01:19

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The testes, also known as testicles, are the male gonads. They are housed within the scrotum, a sac-like structure located beneath the penis. The scrotum's primary role is to regulate the temperature of the testes, which is crucial for sperm production.
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Exercise Stress Test01:26

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Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
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Exercise and Cardiovascular Response01:20

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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Muscle Recovery and Fatigue01:24

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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Related Experiment Video

Updated: Mar 17, 2026

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training
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Testicular Function During Exhaustive Endurance Training.

R O Griffith, R H Dressendorfer, C D Fullbright

    The Physician and Sportsmedicine
    |July 19, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Exhaustive endurance exercise may negatively impact male reproductive health. Athletes experienced decreased testosterone and libido, suggesting potential overtraining stress and suppressed testicular function.

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    Area of Science:

    • Sports Medicine and Endocrinology

    Background:

    • Endurance athletes often engage in high-volume training.
    • Potential impacts of extreme exercise on hormonal balance are not fully understood.

    Purpose of the Study:

    • To investigate the effects of exhaustive endurance training on testicular function in athletes.

    Main Methods:

    • A study involving six endurance athletes undergoing two weeks of prolonged running and cycling.
    • Monitoring of hormonal levels, body composition, and self-reported symptoms.

    Main Results:

    • Persistent fatigue was reported by all participants.
    • A significant decrease in plasma testosterone levels (17%) was observed.
    • A non-significant decrease in sperm count and self-reported decline in sexual activity and libido.

    Conclusions:

    • Exhaustive endurance training may suppress testicular function.
    • Decreased testosterone and libido could be early indicators of overtraining syndrome.
    • Further research is warranted to confirm these findings.