A person's residual functional capacity is the most they can still do in a work setting, on a regular and sustained basis, despite physical or mental limits caused by injury, illness, or disability.

It often covers practical abilities such as how long someone can sit, stand, walk, lift, carry, reach, concentrate, follow instructions, or keep pace through a full workday. For example, someone hurt in a crash on M-59 in Macomb County might be able to lift 10 pounds occasionally but not bend, climb, or stand for more than 20 minutes at a time. That is very different from saying they are "fine" just because they can drive to an appointment or do one chore at home. A real RFC looks at what can be done reliably, safely, and repeatedly.

This matters because insurers, employers, and disability reviewers may use a flattering or incomplete RFC to argue that a person can return to work when they really cannot. In a claim for Social Security Disability, the RFC assessment can decide whether benefits are approved or denied. In Michigan work-injury cases, similar functional opinions can affect disputes under the Workers' Disability Compensation Act of 1969 over work restrictions, wage loss, and return-to-work pressure.

Watch for traps: rushed exams, cherry-picked medical notes, and job descriptions that ignore pain, fatigue, medication side effects, or mental strain. A weak RFC can quietly damage a disability claim, a workers' compensation case, or a settlement.