‘Breathing into your pockets’ is a way to explore the link between breathing and your abdominal and pelvic floor muscles, and your hip flexors.
Breathing into your pockets: the belly-pelvic floor-breath connection
Lolasana or pendant pose 101 (a new option for core strength)
Lolasana requires core strength including your hip flexors, as well as arm strength. Plus it’s fun!