The bench V-sit crunch is a bodyweight core exercise performed seated on the end of a flat bench, folding the torso and bent legs together into a V to train the abs and hip flexors. TheV-sit crunchdoes the same fold lying on the floor with straight legs; here the bench holds your hips at one fixed height and your hands grip the edge, so the legs can drop below the hip line and the abs never lose tension at the bottom. Lifters use it as an accessible core accessory late in a session.
What Muscles Does the Bench V-Sit Crunch Work?
- Primary: Rectus abdominis (abs), iliopsoas and rectus femoris (hip flexors)
- Secondary: Internal and external obliques, tensor fasciae latae
- Tertiary: Transversus abdominis, triceps, latissimus dorsi
How Do You Set Up for the Bench V-Sit Crunch?
Sit on the end of a flat bench with your knees bent and your feet flat on the floor. Grip the sides of the bench just behind your hips, elbows soft, and lean your torso back to roughly 45 degrees without rounding into a slump. Pull your ribs down toward your pelvis, tuck your chin, and lift your heels an inch off the floor so the abs already carry the weight of both legs.
How Do You Perform the Bench V-Sit Crunch?
- Set the lean and the grip with the torso back at 45 degrees and the heels hovering.
- Exhale and pull your knees up toward your chest while curling the torso forward to meet them.
- Close the V until your thighs reach your ribs and you are balanced on your sit bones on the bench.
- Squeeze for one count at the top, ribs pulled down, hands only steadying.
- Open slowly over two counts, extending the legs toward the floor as the torso leans back.
- Stop with the heels hovering and the lean set, then start the next rep.
What Are the Key Form Cues?
- Both ends travel: the knees and the sternum must move the same distance, so the fold happens in the middle rather than the legs doing it alone.
- Hands steady, not lift: keep the grip light on the bench edge so the arms cannot press you into the fold.
- Stay balanced on your sit bones, not rocking back onto your tailbone.
- Feel the abs, not the front of the hips, close the angle at the top.
- Keep the heels an inch clear of the floor through the whole set.
What Are the Most Common Mistakes?
- Pulling on the bench with the arms: the triceps and lats fold you up and the abs only hold on, so loosen the grip until they cannot help.
- Letting the feet touch down between reps: tension drops to nothing and every rep restarts cold, so hover the heels.
- Rounding the lower back into a slump on the lean: the lumbar spine takes the load in flexion while the legs pull the pelvis, so keep the chest up and shorten the lean.
- Swinging the legs to build momentum: the shins whip up and the crunch never happens, so pull the knees on a two-count.
- Sitting too far forward on the bench: the hips slide off as you fold, so plant your seat with a hand's width of bench behind you.
What Are the Best Bench V-Sit Crunch Variations?
- Bench knee tuck: the torso stays leaned back and only the knees travel, the regression.
- Straight-leg bench V-sit crunch: the legs stay long, lengthening the lever.
- Weighted bench V-sit crunch: a light dumbbell held between the feet loads the leg half.
- Single-leg bench V-sit crunch: one leg folds while the other hovers, adding an anti-rotation demand.
- Floor V-sit crunch: the same fold lying on the mat with no hand support, and no bench to sit against.
How Do You Progress the Bench V-Sit Crunch?
- Hold a 5 pound dumbbell between your feet once every set finishes at the top of the rep range.
- Work from 10 reps up to 20 per set before adding load.
- Add a set per week from 2 up to 4 while the last set closes as far as the first.
- Hold the top for three seconds, or open over four counts, before the next load jump.
How Should You Program the Bench V-Sit Crunch?
Program it late in a session as a core accessory, after your pressing, squatting or pulling work is finished. Two to three sessions a week is enough. Work 2 to 4 sets of 10 to 20 reps with 45 to 60 seconds of rest. Pair it with a side plank or a cable chop so the obliques get work the forward fold does not give them. Set the bench where nothing blocks the leg path.