What to Do If You Can’t Do Crunches or Sit Ups

Many people struggle with traditional core exercises like crunches and sit-ups due to neck strain, lower back discomfort, or difficulty with spinal flexion. These exercises, which focus on bending the torso forward, are not the only way to build a powerful midsection. The core is a three-dimensional muscular cylinder involving the abdominals, obliques, lower back, and hips, not just the rectus abdominis. The primary function of this musculature is to stabilize the spine and resist unwanted movement. Building a robust core involves training these deep muscles to work as a unified unit, which can be accomplished effectively without ever performing a crunch.

Ground-Based Core Stability Exercises

Foundational core strength is built by teaching the trunk to maintain a rigid, neutral position against gravity or moving limbs. These low-impact, floor-based exercises are excellent starting points for those with back sensitivity because they minimize spinal movement. The goal is to train the core to function as an anti-movement system, specifically resisting extension and excessive flexion of the lower back.

The Plank

The Plank is the quintessential anti-extension exercise, requiring the body to hold a straight line from head to heels. Proper form dictates that the elbows should be stacked directly beneath the shoulders, and the abdominal muscles should be braced. This sustained contraction primarily activates the deep transverse abdominis, which acts like a natural corset to stabilize the lumbar spine.

The Dead Bug

The Dead Bug is a supine exercise focusing on anti-extension, training the core to maintain spinal neutrality while the limbs move. Lie on your back with knees and hips bent to 90 degrees, ensuring the lower back remains pressed to the floor. As you slowly extend one leg and the opposite arm toward the floor, the core must engage powerfully to prevent the low back from arching. This controlled movement demands focused stability under changing leverage.

The Bird Dog

The Bird Dog is performed on the hands and knees, targeting coordinated stability between the core, hips, and shoulders. From a tabletop position, extend one arm straight forward and the opposite leg straight back, keeping the torso level. The challenge is resisting rotation and lateral bending as the base of support shrinks from four points to two. This demands precise control from the deep stabilizing muscles and reinforces the spine’s natural position.

Anti-Movement and Resistance Training

Moving beyond basic stability, the next stage of core development involves training the torso to resist external forces that attempt to twist or bend the body. These anti-movement exercises are highly functional, replicating the core’s role in daily activities or bracing during athletic movements. They effectively target the obliques and deeper stabilizing muscles in ways traditional crunches cannot.

The Pallof Press

The Pallof Press is the gold standard for anti-rotation training, using a cable machine or resistance band anchored at chest height. Standing perpendicular to the anchor point, press the handle straight out in front of your chest and hold. The resistance attempts to pull your torso toward the anchor, forcing the entire core musculature to fire isometrically. This action, particularly engaging the obliques and transverse abdominis, prevents the spine from twisting and trains the core to remain square and stable.

Side Planks

Side Planks address anti-lateral flexion, training the core to resist bending sideways, which is often neglected in traditional routines. Lying on your side, support your body weight on one forearm and the side of your foot, driving the hips upward to form a straight line. This movement heavily recruits the quadratus lumborum and the obliques on the bottom side, creating powerful lateral stability. Variations include performing the movement from the knees for lower intensity or adding a hip dip for a dynamic challenge.

Farmer’s Carries

Farmer’s Carries involve walking while holding heavy weights in both hands, or in just one hand for an advanced challenge. This full-body isometric hold forces the core to work intensely to prevent the trunk from leaning or rotating under the load. When carrying weight only on one side, the core must fight against anti-lateral flexion and anti-rotation simultaneously to keep the spine vertical. This highly functional movement builds full-body endurance and grip strength while reinforcing a neutral spinal posture under load.

Functional Integrated Core Work

The most advanced application of core strength involves integrating it into full-body movements that mimic real-world force transfer. These dynamic exercises teach the core to accelerate, decelerate, and transmit power between the lower and upper body, rather than isolating it. This integration makes a core truly functional, enhancing performance and preventing injury in dynamic situations.

Cable Chops and Lifts

Cable Chops and Lifts are diagonal, full-body movements that train the core to control rotational force. The Chop involves pulling resistance from a high anchor point down and across the body toward the opposite hip. Conversely, the Lift involves pulling resistance from a low anchor point up and across the body toward the opposite shoulder. Both movements require the core to work dynamically with the hips and shoulders to transfer force across the body’s midline, improving rotational power and coordination.

These exercises are frequently performed in a half-kneeling or tall-kneeling position to eliminate the legs’ involvement. This forces the core to stabilize the hips and pelvis, ensuring power generation and control come directly from the torso. The diagonal pattern of Chops and Lifts is more representative of daily movement than the linear flexion of a sit-up, making them superior for developing usable strength.

Core Bracing in Compound Movements

Integrating core bracing into compound movements, such as squats and lunges, is the ultimate test of functional strength. Core bracing involves creating a 360-degree belt of tension around the midsection by taking a deep breath and contracting the core muscles firmly. This action significantly increases intra-abdominal pressure, which acts as an internal support mechanism for the spine. Mastering this technique allows the core to protect the lower back and efficiently transfer force when lifting heavier loads.