Why "Sitting Still" is a Full-Body Workout

If you’ve ever found yourself saying "Sit up straight," "Feet on the floor," or "Why are you laying on the dinner table?" you aren't alone. For many kids with ADHD, autism, or low muscle tone, the simple act of sitting in a chair feels like trying to balance on a tightrope for six hours a day. We see the "wiggling" or the "slumping" and think they aren't paying attention, but the clever insight is that they are actually working too hard just to stay upright.

This is all about Core Stability, or what I like to call the Internal Anchor.

The Clever Insight: The Keel of the Boat Think of your child’s body like a sailboat. The "sails" are their arms and legs—the parts that move and do things. But for the sails to work properly, the boat needs a "keel"—a heavy, strong weight at the very bottom that keeps the boat from tipping over in the wind.

In the human body, the "keel" is the core—the muscles in the stomach, back, and hips. If the Internal Anchor is "loose" or weak, the child feels like they are constantly tipping over. Their brain has to spend 80% of its energy just trying not to fall off the chair. That leaves only 20% of their brain left for listening to a teacher or finishing a puzzle.

When they slump over their desk or wrap their legs around the chair, they aren't being "lazy." They are manually trying to create the stability their "anchor" isn't providing.

Demonstrating the "Anchor-Up" Method Instead of fighting the wiggle, we can help "tighten the anchor." You don't need a gym; you just need a few minutes of Heavy Work.

1. The "Human Sandwich": Have your child lie between two large couch cushions and give them "firm presses" (the sandwich filling). This deep pressure engages the core muscles and helps the brain "locate" the center of the body.
2. The "Floor Desk": If they are slumping at the table, let them do their homework lying on their stomach on the carpet, propped up on their elbows. This position (called "prone") naturally strengthens the back and neck muscles while keeping the core engaged.
3. Active Seating: Replace a traditional chair with a "wobble stool" or a large exercise ball for 15 minutes. This forces the Internal Anchor to do tiny, constant "micro-adjustments," which builds strength over time without it feeling like "exercise."

An Insightful Resource: The "90-90-90" Check When a child must sit at a desk, use the 90-90-90 Rule. Their knees should be at 90 degrees, their hips at 90 degrees, and—most importantly—their feet should be flat on a surface.

If their feet are dangling, their Internal Anchor has no "grounding" signal. It’s like trying to park a boat in a storm without a dock. Adding a simple footstool (or even a stack of old books) can immediately increase their attention span by 50% because their brain stops worrying about falling.

The Ultimate Daily Win: Strength through Play The biggest win is realizing that "movement" is the medicine for "stillness." Last week, my son was "sliding" out of his chair during dinner. Instead of getting frustrated, I asked him to help me "push the heavy grocery bags" into the kitchen.

That one minute of heavy pushing "turned on" his core muscles. When he sat back down, his "anchor" was set. He sat upright and finished his meal because his body finally felt steady enough to do it.

Moving Forward Stop seeing the slump as a choice. See it as a signal that the anchor needs a lift.

Give them the "heavy" jobs, let them work on the floor, and always, always support their feet. When you strengthen the anchor, you free up their brain to do the amazing things it was meant to do. You’re doing a great job building their foundation!