Too many training programs are writing only prescribing sagittal plane (front/back) movements like squats, deadlifts, lunges, pushups etc. Yes these are great movements and (depending on your goals) they should will definitely make up the majority of your program.
That said, you do want to make sure you add some laterals and rotational work into your programs. Life happens in 3 dimensions and you’ll have a more well rounded athleticism if you work a few movements each week in the frontal and/or transverse planes of movement.
Kettlebell windmills are great movement to improve core and scapular stability as well hip and thoracic mobility.
Try 8 sets of 3 per side (heavy but not close to failure) to finish off your next training session.