Killer Legs is a floor-based leg workout that never asks you to stand up and never lets that feel like mercy. Leg extensions, side leg extensions and leg swings work from all fours; single leg bridges, seated leg swings and side leg raises finish from your back, your hands and your side. Sixty reps per set, all of them aimed at the glutes and hips from angles standing work cannot reach.

The two halves divide the territory cleanly. The all-fours block isolates the glutes with escalating precision: leg extensions drive straight back, side leg extensions swing the knee out laterally to wake the glute medius, and leg swings sweep the straight leg through its longest arc. The floor block then removes even the stability of the tabletop position. Single leg bridges load one glute at a time while the pelvis fights to stay level, seated leg swings hand the work to the hip flexors and quads with your bodyweight propped on your palms, and side leg raises finish the outer hips with the slow, strict isolation they respond to best. No load but bodyweight, no rest but transitions - the kill is in the accumulation.

Keep your hips square to the floor through the entire all-fours block - the moment your pelvis tips to help the leg lift higher, the glute hands the work to your lower back. Drive through the planted heel on single leg bridges and keep both hip bones level. Move every raise and swing with control; swinging momentum through the arc is the one guaranteed way to make this workout easy, and easy was never the assignment.

Sixty reps and the floor never lets go. Killer was not a metaphor - ask your glutes tomorrow.

Make it Harder: Add a two-second pause at the top of every rep.

Make it Easier: Drop each exercise to six reps and shake out between blocks.