Human study · Exercise · 5 Nov 2026
In 41 young adults and 42 older adults, gravity-related arm planning stayed intact, with less left-right difference
Source: GeroScience
What the research found
GeroScience published a human movement study on 5 November 2026. Poirier, Gaveau, and colleagues tested whether healthy aging changes how people use gravity when they move an arm up or down. Forty-one healthy young adults (mean 24.3 years, standard deviation 3) and forty-two healthy older adults (mean 72.0 years, standard deviation 6) made single-joint upward and downward arm movements with the dominant and nondominant arm. The team recorded arm motion and electrical activity in the main muscles. In young adults, the dominant arm generally showed the expected planning pattern. In older adults, that left-right difference was gone, and both arms looked like the young adults' dominant and nondominant arms. The authors read this as less lateralized planning, not a global loss of the ability to plan the movement. The abstract does not split results by sex. This was a laboratory movement test, not an exercise training program. DOI 10.1007/s11357-026-02595-z. Not medical advice.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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