props: mat
highlights: plank walkouts, hip opener, no equipment, free arms
level up: add wrist weights
level down: keep double lunge a single
props: mat, free weights
highlights: arms and back focus, balance work, throwback playlist
level up: add wrist weights
level down: no weights
props: mat, skimmers, or socks/towel on hardwood floor, wrist weights
highlights: twisting, inner thigh emphasis, pop playlist, skimmers
level up: add 3lb weights
level down: skip the wrist weights
props: free/wrist weights, mat
highlights: long plank, balance work, obliques, minimal equipment
level up: add ankle weights
level down: remove wrist weights
