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Updated: Sep 17, 2025
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
Shoulder joint rotational range of motion characteristics among the elderly
Daisuke Toyoda1, Tomohiro Mizuno2, Kenji Iwatate2
1Department of Physical Therapy, School of Health Sciences at Odawara, International University of Health and Welfare: 1-2-25 Shiroyama, Odawara-shi, Kanagawa 250-8588, Japan.
None:
[Purpose] We characterized the range of rotational motion around the three most used positions in elderly adults and developed an objective index for shoulder joint evaluation. [Participants and Methods] We investigated the range of rotational motion in the first, second, third, and transitional positions in 60 healthy young adults (60 shoulders) and 30 elderly adults (30 shoulders). We also examined changes in rotational range with variations in limb position. [Results] In older adults, the internal rotation range of motion was significantly lower at 30° abduction, 60° abduction, second position, 30° horizontal flexion, and third position. External rotational range of motion in elderly adults was also significantly lower in the first, second, 30° horizontal flexion, 60° horizontal flexion, third, 60° flexion, and 30° flexion positions. [Conclusion] The findings of this study provide objective measures of changes in rotational range of motion associated with different limb positions that may serve as an index for understanding age-related changes in shoulder mobility over time.
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