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Re:Early Retirement May Speed Up Cognitive Decline: Study by 0xfeba on Wednesday October 30, 2019 @09:48PM (#21404934)
Never use them.

Truthfully I believe it's strength training that actually helps keep them up. Could be wrong.

Re:Early Retirement May Speed Up Cognitive Decline: Study by huherto on Wednesday October 30, 2019 @11:49PM (#21405577)
IMHO. Moderate strength, moderate cardio, Moderate mobility. Mobility in particular may improve blood irrigation on the joints and help regeneration.