Barbell KAS Glute Bridge
What Is the Barbell KAS Glute Bridge?
Barbell KAS Glute Bridge is an isolation exercise that primarily targets the glutes and also engages the hamstrings, adductors and quadriceps. It is an intermediate-level movement: you set up like a hip thrust, with your upper back on a bench and a loaded barbell across your hips, but you only work the top part of the range, lowering a few inches from lockout instead of all the way down.
It sits between two lifts that have their own pages. A Barbell Hip Thrust uses the same bench and bar position but lowers the hips close to the floor on every rep, training hip extension from deep flexion all the way to lockout. A Barbell Glute Bridge keeps the shoulders on the floor, so its range is short by design and the hips touch down between reps. The KAS version keeps the hip thrust setup but chooses a short range on purpose: the hips stay high for the whole set, the glutes never get a rest at the bottom, and there is no floor to bounce off.
Because every rep stays close to full hip extension, the work lands on the glutes near their shortened, fully contracted position. The hamstrings and adductors help extend the hips, and the quadriceps hold the knees at roughly a right angle. Most lifters use noticeably less weight than they would for a full-range hip thrust and take higher reps with a brief squeeze at the top, which makes it a common glute finisher after heavier hip thrusts, squats or deadlifts.
It suits lifters who already know the hip thrust and want a glute-focused variation with constant tension, and trainers who want a glute exercise that is easy to keep strict, since the short range leaves little room for momentum. The movement is small, so it rewards a slow, deliberate squeeze over heavy weight moved quickly. If you are new to bridging, learn the pattern with the Glute Bridge and the Bodyweight Hip Thrust before adding a bar.
Muscles Worked
- Gluteus Maximus
- Primary
- Adductor Magnus
- Medium
- Biceps Femoris
- Medium
- Gluteus Medius
- Medium
- Vastus Lateralis
- Medium
Instructions
- Brace a flat bench or sturdy padded box against a wall so it cannot slide, and sit on the floor with your back to its long edge.
- Roll a loaded barbell over your legs until it rests in the crease of your hips, with a bar pad or folded mat under it.
- Lean back so the edge of the bench sits across your upper back, just below your shoulder blades.
- Plant your feet flat about hip-width apart with your toes turned slightly out, and grip the bar overhand just outside your hips to keep it from rolling.
- Drive through your heels and lift your hips until your torso and thighs form a straight line roughly parallel to the floor, with your knees bent to about 90 degrees. This is the top of every rep.
- Keep your ribs down and your chin slightly tucked, and squeeze your glutes hard for a moment without arching your lower back.
- Lower your hips a few inches, letting your torso pivot on the bench edge, and stop well above the floor while your glutes are still working.
- Drive back up to the top position and squeeze again. Keep the reps smooth, with no rest or bounce at the bottom.
- After the last rep, lower your hips to the floor and roll the bar off your legs.
Common Mistakes
Lowering too far
Dropping the hips toward the floor turns the set into a regular hip thrust and gives the glutes a rest between reps.
Arching at the top
Pushing past a straight line by arching the lower back and flaring the ribs moves the load from the glutes to the spine.
Bouncing the reps
Rushing short reps with momentum instead of pausing and squeezing at the top takes the work away from the glutes.
Too much weight
Loading the bar as heavily as a full hip thrust usually costs the lockout and turns each rep into a shallow bounce.
Poor foot placement
Feet too close to the hips shift the work to the quadriceps, while feet too far out let the hamstrings take over and can strain the lower back.
Sliding on the bench
Letting the upper back slide along the bench, or using a bench that is not braced, makes the bar path unstable.
Injuries
Barbell KAS Glute Bridge is a low risk exercise when performed with proper technique. The short range and moderate loads keep the hips and lower back out of the deep, heavily loaded bottom position of a full hip thrust. The usual strain points are the lower back, when you finish each rep by arching instead of extending the hips, the front of the pelvis, where the bar presses on the hip bones, and the upper back and neck where they rest on the bench.
Keep your ribs down and your chin slightly tucked so each rep ends with your torso and thighs in a straight line, not with an arched back. Use a thick bar pad or a folded mat across your hips, and brace the bench against a wall so it cannot slide. Pick a bench height that meets your upper back just below the shoulder blades; one that is too high makes you climb up it as you lift. Add weight gradually, because a load you can only move with short, bouncing reps is too heavy for this exercise.
To regress, do the same short-range reps with body weight or a dumbbell on your hips, or go back to the Glute Bridge on the floor. To progress, hold the top longer, slow the lowering, or move to a Barbell B-Stance Hip Thrust to put more of the load on one leg. Stop the set if you feel sharp pain in your lower back, a pinch at the front of the hip, or bar pressure that goes beyond discomfort, and see a qualified professional if back or hip pain persists.
Frequently Asked Questions
- Q: What is the difference between a KAS glute bridge and a hip thrust?
Both use the same setup, with your upper back on a bench and the bar across your hips. A Barbell Hip Thrust lowers the hips close to the floor on every rep, while the KAS version stays near the top and lowers only a few inches, so the glutes stay under tension for the whole set and you usually use less weight.
- Q: How is it different from a barbell glute bridge?
A Barbell Glute Bridge is done with your shoulders on the floor, and the hips come back down to the floor between reps. The KAS version puts your upper back on a bench like a hip thrust and keeps your hips off the floor until the set is over.
- Q: How far should I lower my hips?
Only a few inches. Lower until you feel your glutes start to relax or your knees begin to drift back toward you, then drive back up. If your hips get close to the floor, you are doing a hip thrust instead.
- Q: Where does the name KAS come from?
The name is usually credited to strength coach Kassem Hanson. You will see it written both as KAS and as Kas.
- Q: How many reps should I do?
Moderate to high reps suit it best, commonly 10 to 15 or more per set with a brief squeeze at the top of each one. Pick a weight light enough that every rep still reaches a full, flat lockout.