The following ten exercises are designed for beginners who want to strengthen the muscles of the trunk, including the front, the sides, and the lower back, with each exercise explained through starting position, muscle activation, and repetition guidelines suitable for a first core routine.
| Exercise | Primary Muscles | Starting Volume | Main Purpose |
|---|---|---|---|
| Plank | Rectus abdominis, transverse abdominis | 3 sets, 20 to 30 seconds | Trunk stability |
| Dead Bug | Transverse abdominis, hip flexors | 3 sets, 8 to 10 per side | Coordination and control |
| Bird Dog | Erector spinae, glutes, abdominals | 3 sets, 8 to 10 per side | Stability under movement |
| Glute Bridge | Glutes, hamstrings, lower back | 3 sets, 12 to 15 reps | Posterior chain support |
| Side Plank | Obliques, quadratus lumborum | 3 sets, 15 to 20 seconds per side | Lateral stability |
| Bicycle Crunch | Rectus abdominis, obliques | 3 sets, 12 to 15 per side | Rotational strength |
| Reverse Crunch | Lower rectus abdominis, hip flexors | 3 sets, 10 to 12 reps | Lower ab control |
| Superman | Erector spinae, glutes | 3 sets, 10 to 12 reps | Back extension strength |
| Pallof Press | Obliques, transverse abdominis | 3 sets, 10 to 12 per side | Anti-rotation control |
| Hollow Body Hold | Full anterior core | 3 sets, 15 to 20 seconds | Total trunk tension |
1. Plank The plank begins face down on the floor, with forearms placed under the shoulders, elbows bent at ninety degrees, toes tucked under, and the body lifted into one straight line from the head to the heels, the abdominal wall pulled inward, the glutes squeezed, the neck kept neutral by looking slightly forward rather than up, the breathing kept steady rather than held, since holding the breath raises internal pressure without adding stability, and for beginners the goal is the cleanest possible line rather than the longest possible hold, meaning the hips should never sag toward the floor nor rise upward toward the ceiling, because either fault shifts the load away from the abdominal wall and onto the shoulders or the lower back.
2. Dead Bug The dead bug is performed lying on the back, with the arms reaching straight up toward the ceiling and the knees bent at ninety degrees directly above the hips, the lower back pressed firmly into the floor throughout the movement, one arm reaching slowly overhead while the opposite leg extends straight out low to the floor, then both returning to the starting position before switching sides, the exercise teaching the trunk to stay still while the limbs move, which mirrors the demands of walking, running, and lifting, where the spine must remain steady while the arms and legs generate force, and beginners are encouraged to keep the movement slow and to stop the leg extension at the point where the lower back would otherwise lift off the floor.
3. Bird Dog The bird dog starts on the hands and knees, with the hands stacked under the shoulders and the knees under the hips, the spine held in its natural neutral position, one arm extending straight forward while the opposite leg extends straight back, both reaching to hip height rather than higher, the hips and shoulders kept level and square to the floor without twisting to one side, a brief pause held at the top before returning with control to the starting position, then switching to the other arm and leg, the exercise building the ability of the lower back and glutes to keep the spine steady while the limbs move independently, a skill directly useful for lifting, carrying, and general daily movement.
4. Glute Bridge The glute bridge is performed lying on the back, with the knees bent, the feet flat on the floor about hip width apart, placed close enough to the hips that the fingertips can just brush the heels, the hips pressed upward by squeezing the glutes rather than by arching the lower back, the body forming a straight line from the shoulders through the hips to the knees at the top of the movement, a brief pause held at the top, then a slow lowering back to the floor, the exercise strengthening the glutes and hamstrings while teaching the lower back to stay supported rather than overworked, which directly benefits posture and reduces strain during standing and walking.
5. Side Plank The side plank is performed lying on one side, with the elbow placed directly under the shoulder and the legs stacked or staggered for added balance, the hips lifted off the floor until the body forms a straight line from the shoulder to the ankles, the supporting shoulder kept away from the ear, the hips kept forward rather than allowed to rotate backward, a steady hold maintained for the prescribed time before switching to the opposite side, the exercise building strength in the obliques and the muscles along the side of the trunk that resist side bending, a quality often overlooked by exercises that only train forward and backward movement of the spine.
6. Bicycle Crunch The bicycle crunch begins lying on the back, with the hands placed lightly behind the head and the knees drawn in toward the chest, one shoulder rotating toward the opposite knee while the other leg extends straight out low to the floor, then alternating sides in a smooth rhythm, the movement driven by the rotation of the ribcage toward the hip rather than by pulling on the neck with the hands, the exercise training the obliques together with the rectus abdominis in a rotational manner that reflects the twisting demands of throwing, reaching, and turning, and beginners are advised to slow the tempo down considerably before attempting to speed the movement up.
7. Reverse Crunch The reverse crunch is performed lying on the back, with the knees bent and lifted so the thighs are roughly perpendicular to the floor, the lower abdominal muscles used to curl the hips slightly off the floor and draw the knees in toward the chest, the movement kept small and controlled rather than using the legs to swing for momentum, the lower back lowered back down with control rather than dropped, the exercise placing emphasis on the lower portion of the rectus abdominis, a region that beginners often struggle to engage directly during standard crunches or sit-ups performed from the upper body alone.
8. Superman The superman is performed lying face down on the floor, with the arms extended forward beyond the head and the legs extended straight behind, the arms and legs lifted simultaneously a short distance off the floor while the lower back and glutes contract to hold the position briefly before lowering back down with control, the neck kept neutral rather than lifted upward, the exercise directly strengthening the erector spinae muscles that run along the length of the lower back, muscles that are frequently underdeveloped in beginners who focus training only on the front of the trunk while neglecting the muscles along the back of it.
9. Pallof Press The Pallof press is performed standing sideways to a resistance band or cable anchored at chest height, the hands gripping the handle at the center of the chest, the arms pressed straight out in front of the body against the pull of the resistance trying to rotate the trunk to one side, the hips and shoulders held square and facing forward throughout, a brief pause held at full extension before returning the hands back to the chest with control, then repeating for the prescribed repetitions before turning to face the opposite direction, the exercise training the trunk to resist rotation rather than to create it, a quality proven to protect the lower back during twisting or reaching movements common in daily life and sport.
10. Hollow Body Hold The hollow body hold begins lying on the back, with the arms extended overhead and the legs extended straight, the lower back pressed into the floor by tilting the pelvis slightly, the shoulders and legs then lifted a small distance off the floor to form a gentle curve through the body from the fingertips to the toes, the position held for the prescribed time while breathing continues steadily, the exercise demanding continuous tension through the entire front of the trunk rather than repeated movement, and beginners are advised to keep the legs low enough and the arms close enough to the head that the lower back remains pressed down throughout the entire hold.
These ten exercises, performed with attention to form and steady breathing rather than speed or repetition count, build the foundation of trunk control that supports every other type of training, from walking and lifting to running and sport, and beginners who practice them consistently for several weeks typically notice improved posture, reduced lower back discomfort during daily activity, and a stronger base from which to progress toward more demanding core and full body training in the future.
Albert Mckennie is a strength and conditioning coach, author, and speaker with experience training athletes and general fitness clients.