Do you have to sit cross legged to meditate? free mindfulness Quick answer: no. Long answer: not at all, and if your knees are already protesting, twisting into a pretzel probably backfires. That picture of a calm person folded on the floor works nicely for stock photography. As a rule, it's terrible.

Where the Image Came From
Folded legs became common where people sat on floors all day. Their hips had plenty of practice. We mostly sit in chairs all day, so we hit the floor creaky as an old sofa and then puzzle over why ankle pain hogs our attention.
Traditional postures exist for a reason, granted. Yet the reason was steadiness and alertness, not misery.
What Your Body Actually Needs
Two things, really. A reasonably upright spine, and a body that isn't yelling at you. That covers it. Everything else is flexible.
Use a straight-backed chair, both feet flat on the floor. Let your hands rest on your thighs. Drop your shoulders like coats on a hook. Finished. You're meditating in a position with the same basic shape as the one on every book cover.
More Positions That Work
Kneel with a folded blanket under you and your hips get a break. A low bench offers the same relief. You can lie down too, but admit it: if you drift off easily, meditation turns into napping. Not illegal, just a different activity.
Standing works, and walking works. A man I know meditates at the bus stop every morning, weight on both feet, eyes soft, nobody the wiser. If you use a wheelchair, you're already set. The practice lives in attention, not in the angle of your joints.
A Quick Comfort Check
Tuck cushions beneath anything that hurts. Prop up your knees if they dangle. If your legs go numb, move. Pain isn't a badge. Sharp pain is data, and brushing it off just trains your mind to fear the whole thing.
A little restlessness is normal. Shifting a bit now and then ruins nothing. Move slowly, notice the urge first, then shift. That tiny pause of noticing is the practice, shrunk down.
The Posture Question Behind the Question
People often ask this because they're afraid of doing it wrong. At the bottom, they want a green light. Here it is. Choose a position you can keep for a few minutes without clenching your jaw, keep your back honest, and start.