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The original was posted on /r/tifu by /u/alwayspookyszn on 2026-05-17 07:01:43+00:00.

This story starts like most, by doing something innocuous. I was doing house chores when my top body moved before my lower and I felt my knee almost dislodge? It was the weirdest feeling ever but my knee felt loose? Not completely, but enough to warrant a frantic Google.

I find out pretty quickly that we’re supposed to always keep a soft bend in your knee when walking and standing. I know from working out and yoga that a soft knee is used in exercise but I never thought to apply that to the rest of my life. I always work out on bikes and my going up or down a hill I would lock my knee when standing on the bike. Instant no.

The more I look at photos the more I realise I’ve literally been doing this forever standing and walking and no one has ever said anything that our true form should feel and look more similar to the way the Sims walk.

Apparently ‘stand up straight’ is a myth, you’re not meant to lock you knees when you do this but still keep a slight bend and that truly aligns your body. It looks straight to the eye, but your legs aren’t locked straight. Not doing it this way can lead to lower back pain (which I’ve always had…)

Well after 30 something years on this Earth I finally tested this slight bend in knee for the last few days and honestly I can feel my core activate so much easier now when doing tasks. The pressure feels so much more balanced on my feet and yes the knee moment has come and gone and I just hope I haven’t done too much damage. I do have to consciously remind myself to bend my knee but hopefully it will become second nature.

tldr: If you’re locking your knees please stop. Your joints will thank you for it. I hope this saves at least one knee cartilage