If you have lower back pain, the exercises most likely to make it worse are sit-ups and crunches, heavy deadlifts and squats, high-impact activities like running and jumping, and standing toe touches. These movements either compress your spinal discs, force your spine into extreme flexion, or send repeated shock waves through an already irritated area. The good news: for most people, back pain improves significantly within six weeks with modified activity. Knowing which movements to skip during that window can make the difference between steady recovery and a frustrating setback.
Why Certain Movements Hurt Your Back
Your lumbar spine has small, fluid-filled discs between each vertebra that act as shock absorbers. When you bend forward (spinal flexion), the front of those discs compresses and pushes the gel-like center toward the back of the spine. If you already have an irritated or bulging disc, that backward shift of material can press on nearby nerves and amplify pain. This is the core reason so many problematic exercises involve bending, rounding, or loading the spine in a flexed position.
Compression matters too. During ballistic jumping and landing, the estimated compression at the lower lumbar spine can exceed ten times your body weight. Even activities that feel moderate, like jogging on pavement, deliver repetitive compressive forces to discs and strained muscles with every footstrike. When your back is already inflamed, those forces stack up quickly.
Sit-Ups, Crunches, and Ab Exercises
Traditional sit-ups and crunches are among the worst offenders. Both movements repeatedly curl your torso toward your knees, which rounds the lower back and drives pressure into the lumbar discs. If you’re doing dozens of reps, you’re cycling that disc compression over and over in a single session. Bicycle crunches and Russian twists add a rotational component, which loads the spine asymmetrically and can irritate the small joints along the back of the vertebrae.
This doesn’t mean you should abandon core work entirely. Spine researcher Stuart McGill developed a set of three stabilization exercises, often called the “Big Three,” specifically designed to build core stiffness without repeatedly flexing the spine. These include the curl-up (a minimal crunch where only the head and shoulders lift while the lower back stays neutral), the side plank, and the bird dog. All three strengthen the muscles that protect your spine while keeping it in a safe, stable position.
Running and High-Impact Cardio
Running sends a jolt through your spine with every stride. On hard surfaces like concrete or a treadmill belt, those impacts travel straight up through the legs and into the lumbar region. If you have a strained muscle or an irritated disc, that repetitive pounding can keep inflammation elevated and delay healing.
The same logic applies to jump-based exercises: box jumps, burpees, jump squats, and plyometric drills. Landing forces at the lower spine can reach extreme levels, well beyond what’s considered safe even for healthy working adults. High-impact aerobics classes fall into this category too. Until your pain subsides, walking, swimming, and stationary cycling on a smooth resistance setting are lower-impact alternatives that keep you moving without the repeated jarring.
Heavy Lifting and Loaded Flexion
Deadlifts, barbell squats, bent-over rows, and overhead presses all place significant compressive and shear forces on the lumbar spine, especially when form breaks down under heavy loads. The risk isn’t just the weight itself. When you strain under a heavy barbell, you tend to hold your breath and brace hard, which spikes pressure inside the abdomen and, by extension, against the spinal discs.
Even lighter free weights can be problematic if the exercise puts you in a bent-forward position. Dumbbell rows, for instance, load the spine while it’s flexed. If you want to keep strength training during a flare-up, focus on movements that keep your spine neutral and supported: wall sits, glute bridges, and machine-based exercises where a backrest controls your posture.
Standing Toe Touches and Some Stretches
Standing toe touches feel like they should help because they stretch the hamstrings, and tight hamstrings do contribute to lower back tension. The problem is how the stretch is delivered. When you fold forward from a standing position, gravity pulls your upper body weight down and your lumbar spine rounds under load. For anyone with a disc herniation or a condition like spondylolisthesis (where one vertebra slips forward on the one below), this can directly worsen symptoms.
You can still stretch your hamstrings safely by lying on your back. One option is to loop a towel around the sole of your foot and gently pull the leg upward while keeping your knee as straight as comfortable. Another is to lie with your buttocks against a wall and rest your legs up the wall, letting gravity do the work. Both positions keep the lower back flat and supported, removing the compressive load that makes standing stretches risky.
Twisting and Rotational Movements
Golf swings, tennis serves, cable woodchops, and seated spinal twists all rotate the lumbar spine under force. The lumbar vertebrae are not designed for large ranges of rotation. Most of your trunk rotation actually comes from the thoracic spine (the middle and upper back). When you force rotation into the lower back, especially with speed or added resistance, you stress the disc fibers and the small facet joints that guide spinal movement. If you play golf or racquet sports, consider taking a break until the acute pain resolves.
Off-Road Cycling and Uneven Terrain
Cycling on a smooth road or a stationary bike is generally a safe option for people with back pain, because the seat supports your weight and eliminates impact forces. Mountain biking or trail riding is a different story. The constant bouncing over roots, rocks, and uneven ground sends unpredictable jolts through the spine. On top of that, the hunched-forward riding position increases lumbar flexion, compounding the compression from each bump.
Your Diagnosis Changes Which Movements Are Worst
Not all lower back pain is the same, and the specific movements to avoid can depend on what’s causing yours. Two of the most common structural causes, disc herniations and spinal stenosis, respond to movement in nearly opposite ways.
With a disc herniation, flexion (bending forward) typically makes pain worse because it pushes disc material toward the nerves. Exercises that extend the spine, like gentle backbends, often feel better. With spinal stenosis, the pattern reverses: standing upright and arching backward tends to narrow the spinal canal and increase symptoms, while sitting or leaning forward opens the canal and brings relief. This is why someone with stenosis might feel fine on a stationary bike (a slightly flexed position) but struggle with walking.
If you don’t know which condition you have, pay attention to which positions feel worse. Pain that increases when you sit or bend forward suggests a flexion-sensitive issue like a disc problem. Pain that increases when you stand, walk, or arch backward points more toward stenosis. This pattern can guide which exercises you modify while you work toward a clear diagnosis.
Signs You Should Stop Exercising Immediately
Most lower back pain is mechanical and improves with time and sensible activity modification. But certain symptoms signal a serious condition called cauda equina syndrome, where the bundle of nerves at the base of the spine is compressed. This is a medical emergency. Stop any exercise and get to an emergency room if you experience numbness in your inner thighs, buttocks, or groin area, sudden difficulty urinating or controlling your bowels, progressive weakness in one or both legs, or new and severe lower back pain combined with any of these neurological changes. This condition requires immediate treatment to prevent permanent nerve damage.
What Recovery Typically Looks Like
A large study tracking people with new-onset lower back pain found that about 75% returned to their normal work hours and duties within six weeks. By that same point, roughly 55% reported no remaining disability. These numbers reflect people who modified their activity without complete bed rest, which is no longer recommended for acute back pain. Staying gently active, walking, doing supported stretches, and performing spine-safe core exercises tends to produce better outcomes than either pushing through pain or lying still.
During the first week or two, the goal is simply to avoid movements that spike your pain. As symptoms ease, gradually reintroduce exercises, starting with bodyweight movements in a neutral spine position and progressing slowly. If an exercise increases your pain during or after a session, that’s a clear signal to back off and try again in another week.