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That posture is a sign of dementia. Specifically fronto temporal dementia.
Interesting. Any sources?
Old age, not helped by lack of exercise and a terrible diet.
Shocking Relationship Discovered Between Posture and Cognitive Decline

Examining Posture During a Health Check Could Identify Cognitive Decline The question of whether cognitive decline may be identified by sagittal spinal balance assessment based on a radiological approach was investigated via a large-scale survey of persons aged 50 to 89 years. Shinshu University re

SciTechDaily
“slight”

Shocking Relationship Discovered Between Posture and Cognitive Decline

Fuck.

Correlation is not causation. The two are related, but one does not cause the other.
What is dementia posturing? Signs and stages

Dementia posturing can cause changes in how a person stands or walks. They may have a stooped back, stiff movements, or balance problems.

There’s also a good indepth analysis of his dementia by this psychologist. youtu.be/l_IWsfLb2xA
This is What Proves Trump’s Dementia: Psychologist | The Daily Beast Podcast

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