The core is far more than abs. It encompasses the entire cylinder of muscles surrounding your spine and pelvis — rectus abdominis, obliques, transverse abdominis, erector spinae, and the deep stabilisers of the lower back and hips. Training these muscles correctly protects the spine, transfers force between the upper and lower body, and produces the visible abdominal definition most people are after.
1. Plank
Transverse abdominis, rectus abdominis, obliques, erector spinae, glutes — full anti-extension stability
Set up
Begin on the floor with your forearms on the ground, elbows directly under your shoulders. Extend your legs behind you and support your weight on your forearms and the balls of your feet. Your body should form a straight line from head to heels. Set your feet hip-width apart.
Technique and form
Squeeze your glutes hard, brace your abs as if about to take a punch, and push your forearms into the floor as if trying to drag them toward your feet — this activates the lats and stabilises the shoulder girdle. Your hips must not sag toward the floor (the most common mistake) or pike upward. Keep your neck neutral — your gaze should be toward the floor, not forward. Breathe steadily throughout; do not hold your breath.
Range of motion
The plank is an isometric hold — there is no range of motion. The goal is time under tension with perfect form. 30–60 seconds of excellent form is more valuable than two minutes of sagging hips and a rounded back. Progress by increasing hold duration, elevating your feet, or adding a weight plate on your back.
2. Dead Bug
Transverse abdominis, rectus abdominis — teaches core stability while limbs move independently
Set up
Lie on your back with your lower back pressed firmly into the floor. Raise your arms straight above your shoulders and bring your legs up with knees at 90°, shins parallel to the floor. This is your start position. Your lower back should remain in complete contact with the floor for the entire exercise — this is the non-negotiable.
Technique and form
Simultaneously lower your right arm toward the floor overhead and extend your left leg toward the floor — moving opposite arm and leg together. Lower them as far as you can while keeping your lower back flat on the floor. When your lower back starts to peel away, you have gone too far. Return both limbs to the start and repeat with the opposite arm and leg. Move slowly and with full control.
Range of motion
The range of motion is determined entirely by your ability to maintain lumbar contact with the floor. Beginners may only be able to lower their limbs a small distance before losing contact. Over time, as your core strength improves, you will be able to achieve full extension of both the arm and leg before your lower back lifts.
3. Hanging Leg Raise
Rectus abdominis (lower fibres), hip flexors, obliques — requires significant core strength
Set up
Hang from a pull-up bar with arms fully extended and hands shoulder-width apart. Engage your lats to stabilise your shoulder girdle — do not just hang passively. Your body should be still before beginning each rep — eliminate any swinging. For beginners, start with knee raises; advance to straight leg raises as strength improves.
Technique and form
Raise your legs by flexing at the hips. Keep your legs together throughout. Avoid swinging your legs — the movement should be slow and controlled. At the top, your legs should be horizontal (parallel to the floor) or above — for advanced athletes, legs travel all the way to bar level. Pause briefly at the top. Lower with full control — do not let gravity drop your legs.
Range of motion
Bring your legs to at least parallel to the floor for a full rep. The lowering phase (eccentric) is critically important — do not rush it. Going all the way to full hip extension at the bottom before the next rep ensures the full range of the rectus abdominis is trained.
4. Cable Crunch
Rectus abdominis — the most loadable ab isolation exercise, allowing progressive overload
Set up
Attach a rope to a high cable pulley. Kneel on the floor facing the machine, approximately one step from the cable stack. Hold the rope handles at the sides of your face. Your hips remain stationary throughout — the movement comes only from your spine, not from pulling with your hips.
Technique and form
Curl your spine downward by contracting your abs — think about bringing your elbows toward your knees. Your hips do not move; your spine curls. At the bottom of the movement your elbows should be close to the floor. Squeeze your abs hard. Return to the upright start position under full control. The cable provides constant tension throughout the range of motion, which is what makes it superior to bodyweight crunches for building ab size.
Range of motion
Full spinal flexion at the bottom — your abs should be fully contracted and shortened. Full spinal extension at the top — your abs should be fully lengthened. This full range makes the cable crunch highly effective for hypertrophy of the rectus abdominis.
5. Russian Twist
Obliques (internal and external), rectus abdominis — rotational core strength
Set up
Sit on the floor with your knees bent and feet flat or slightly elevated. Lean back until your torso is at approximately 45° to the floor — you should feel your abs working to hold this position. Hold a weight plate, medicine ball, or dumbbell in both hands at your chest. This position is your start.
Technique and form
Rotate your torso to one side, bringing the weight across your body toward the floor beside your hip. Your movement should come from your spine rotating, not from moving only your arms. Rotate all the way to one side, then sweep back through the centre and rotate to the other side. Keep your feet controlled — they can move slightly as a counterbalance but should not swing wildly.
Range of motion
Rotate as far as you can in each direction while maintaining your torso position at 45°. A full rotation should bring the weight almost to floor level beside each hip. The obliques are most activated at the end range of each rotation — don’t short-circuit the movement by only rotating 30–40° each way.
6. Ab Wheel Rollout
Entire anterior core — one of the most demanding anti-extension core exercises available
Set up
Kneel on the floor (use a mat for knee comfort) holding an ab wheel with both hands. Start with the wheel directly below your shoulders. Beginners should perform this exercise on their knees until they build sufficient core strength to attempt standing rollouts, which are extremely demanding.
Technique and form
Brace your core maximally before moving. Roll the wheel forward, allowing your body to extend toward the floor. Your hips should not sag — maintain a rigid straight line from your knees through your torso. Roll as far forward as you can while maintaining this rigid position. At your furthest point, your arms will be extended overhead and your face will be close to the floor. Pull back to the start by contracting your abs — not by pulling with your shoulders or hips.
Range of motion
Beginners: roll to approximately 45° from vertical and return. Intermediate: roll until your torso is parallel to the floor. Advanced: full extension with face near the floor. Never allow your lower back to hyperextend or collapse — this is the injury risk of this exercise. Increase range of motion gradually as strength develops.
7. Side Plank
Obliques, quadratus lumborum, glute medius — lateral core stability
Set up
Lie on your side with your forearm on the floor, elbow directly below your shoulder. Stack your feet (or place the top foot slightly in front of the bottom for more stability). Your body should form a straight diagonal line from head to feet. Place your free hand on your hip or extend it toward the ceiling.
Technique and form
Drive your elbow into the ground and lift your hips off the floor so your body forms a straight line. Squeeze your glutes and brace your obliques hard. Do not let your hips drop toward the floor — this is the most common mistake. Keep your neck neutral. Breathe steadily. To progress: raise and lower the top leg, add a hip dip (lower your hip to the floor and raise back up), or hold a weight plate on your top hip.
Range of motion
Isometric hold at maximum height — your body fully elevated in a straight diagonal line. The side plank specifically develops lateral core stiffness that neither the regular plank nor any rotational exercise develops.
8. Bicycle Crunch
Obliques, rectus abdominis — rotational crunch with the highest oblique EMG activation of any ab exercise
Set up
Lie on your back with your hands lightly behind your head — do not interlace your fingers or pull on your neck. Lift both feet off the floor with your knees bent at 90°. Lift your shoulder blades off the floor by engaging your abs. This is your start position for every rep.
Technique and form
Bring your right elbow toward your left knee while simultaneously extending your right leg out straight. Then rotate the other way — left elbow toward right knee, left leg extending. The rotation should come from your core twisting, not from moving your elbows. Your elbow does not need to physically touch your knee — what matters is the rotation of your trunk. Move in a slow, controlled manner rather than rapidly cycling through reps.
Range of motion
Full spinal rotation in each direction — your shoulder should rotate enough that your sternum faces toward the side on each repetition. Slow, deliberate bicycle crunches are far more effective than fast, sloppy ones. Never yank your neck with your hands.
9. Pallof Press
Obliques, transverse abdominis — anti-rotation exercise that builds functional core stability
Set up
Set a cable pulley to chest height. Stand sideways to the cable machine and hold the handle with both hands at your chest. Step away from the machine until there is significant tension — the cable should be pulling you toward the machine sideways. Stand with feet shoulder-width apart, knees slightly bent, a neutral spine.
Technique and form
Press the handle straight out in front of you until your arms are fully extended. Hold for 2–3 seconds. The cable is trying to pull you sideways — your core must resist this rotational force by maintaining a square, stable position. Do not allow your hips or shoulders to rotate toward the machine. Pull the handle back to your chest and repeat. This anti-rotation demand is what makes the Pallof press uniquely valuable for functional core stability.
Range of motion
Arms fully extended at the front — held for 2–3 seconds — returned to the chest. The isometric hold at the extended position is where the anti-rotation demand is greatest and where the core stabilisers are working hardest. Increase difficulty by standing farther from the cable machine.
10. Dragon Flag
Entire anterior core — an advanced movement requiring full body tension and exceptional core strength
Set up
Lie on a flat bench and grip the bench behind your head with both hands. Your upper back and shoulders remain in contact with the bench at all times — this is the pivot point. Bring your legs straight up overhead to begin. This is an advanced exercise; build up to it using lying leg raises and ab wheel rollouts first.
Technique and form
Lower your entire body as one rigid unit from the pivot of your upper back. Your body should remain completely straight — like a flag on a pole. Do not allow your hips to pike or your lower back to sag. Lower as far as possible while maintaining a straight rigid body, then raise back to vertical by contracting your entire core. The eccentric (lowering) phase is the most important part — many beginners practise only the lowering phase until they develop sufficient strength to perform full reps.
Range of motion
From vertical (straight up) to as horizontal as you can manage while maintaining a perfectly rigid body. Full range dragon flags are extremely demanding — most athletes should aim for the progression (eccentric only or partial range) before attempting full reps. Never sacrifice the rigid straight body position for a greater range of motion.
Core training is most effective when it includes all three demands: anti-extension (plank, dead bug, ab wheel), anti-rotation (Pallof press, side plank), and rotation/flexion (cable crunch, bicycle crunch, Russian twist). Include 2–3 core exercises at the end of every training session rather than dedicating an entire session to abs. Visible abdominal definition depends more on low body fat percentage than on core training volume — training the core builds the muscle, but nutrition reveals it.
