Jealous of your shoulder ability

Ah well, I'll just have to keep getting better at all my other lifts
A good warm up for stability and core before a squat session other than all the psoas stretches, hip stretches, foam rolling, xband walks, hip circles, etc... I enjoy doing over head squats with just the bar - it really forces you to get your core strong, and activate the right muscles too - I find it helps to "open up" my hips better - and forces the body and back to be in the right position - else you just cannot finish the squat - it makes you go deep too.