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Related Experiment Videos

Humeral hypertrophy in response to exercise

H H Jones, J D Priest, W C Hayes

    The Journal of Bone and Joint Surgery. American Volume
    |March 1, 1977
    PubMed
    Summary

    Professional tennis players exhibit significant bone hypertrophy on their dominant playing arm. This bone growth, evident in roentgenograms, highlights the body's adaptation to repetitive athletic stress.

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    Area of Science:

    • Sports medicine
    • Orthopedics
    • Exercise physiology

    Background:

    • Repetitive athletic activities can lead to specific physiological adaptations in athletes.
    • Bone structure is known to remodel in response to mechanical loading.

    Purpose of the Study:

    • To investigate bone adaptations in professional tennis players.
    • To quantify differences in bone structure between the playing and non-playing sides.

    Main Methods:

    • Comparative analysis of roentgenograms (X-rays).
    • Measurement of cortical bone thickness in the humerus (upper arm bone).
    • Comparison between dominant (playing) and non-dominant (control) sides.

    Main Results:

    • Pronounced bone hypertrophy was observed on the playing side of professional tennis players.
    • Cortical thickness was significantly greater by 34.9% in men and 28.4% in women on the playing side compared to the control side.
    • These findings indicate a significant adaptive response of bone to exercise.

    Conclusions:

    • Professional tennis provides a stimulus for significant bone hypertrophy in the upper limb.
    • Bone remodeling is a key adaptation to the high mechanical demands of professional tennis.
    • This study demonstrates a clear link between specific, high-repetition athletic actions and bone structural changes.

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