Squatting overhead is a great exercise to not only work the legs but also the back and shoulders. The fact the kettlebells go dead to the ground upon each rep is beneficial to focus on form and technique, it gives you a little time to reset.
The exercise becomes more challenging for coordination if you transition immediately from the snatch into the overhead squat. You can snatch the weight overhead, pause, and then go into the squat, but moving straight from one into the other is the part that starts requiring more coordination.
Following videos show some more squat variations, including overhead, and also mobility progressions for the overhead squat.
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