There is a little trick which can help get the brain working to our advantage. It is called Reactive Neuromuscular Training or RNT. The band around the leg or legs in a squat for example, forces the brain to react to the pressure and push outwards against it. What this does is fire up the muscles that we really want to see activate well in a squat. It’s not magic, just a clever little tool to help improve technique that someone far smarter than us came up with.
Here’s a simple video from a colleague who does a good brief coverage of the concept. It can be used to help many different movements that need re patterning.