Situps can build trunk endurance and hip-flexor strength, yet they’re rarely the best pick for a stronger, steadier core.
Situps have been around forever, so the question keeps coming back: do they work, or are they a waste of reps? The honest answer is that situps do train muscles, just not always the ones people think they’re training. They can help with trunk endurance and the ability to flex your torso, and they can fit certain fitness tests.
Still, many people chase “better abs” with situps and end up with a sore neck, cranky hips, or a back that feels beat up. That’s not a badge of honor. It’s a clue that the movement, the dose, or the goal doesn’t match what your body needs.
This article will help you decide when situps are worth your time, when they’re not, and what to do instead if your goal is a stronger core that carries over to daily life and training.
Are Situps Effective? What they do for your core
Situps train trunk flexion: you move from lying down toward sitting up. The rectus abdominis (the “six-pack” muscle) helps, but it doesn’t work alone. Hip flexors often do a lot of the heavy lifting, especially once your torso passes a certain angle. Your neck and shoulders can get dragged into the job too if your form slips.
That mix can still be useful. If your goal is to build tolerance for repeated trunk flexion, situps can help. If your sport or job involves getting up from the ground often, situps can be one piece of training. If you’re training for a situp-based fitness test, you need some situps in your plan.
Yet “effective” depends on the target. Many people want a core that resists motion, not a core that only makes motion. Think of bracing while carrying groceries, keeping your torso steady on a hike, holding posture during a run, or staying solid under a barbell. For those jobs, anti-extension and anti-rotation drills (planks, carries, dead bugs, bird dogs) often deliver more carryover with less crankiness. Harvard Health even advises skipping classic situps for core work built around steadiness, with planks as a go-to option. Want a stronger core – skip the sit-ups.
Situps effectiveness for core strength and movement
Let’s separate a few goals that get mashed together:
- Trunk endurance: Situps can build it, mostly in a flexion pattern.
- Core “strength” for daily tasks: Often more about bracing, balance, and control than flexing over and over.
- Lower-back comfort: Some people tolerate situps fine; others flare up fast, especially with high volume.
- Visible abs: That’s mostly about body fat levels and overall training, not hundreds of situps.
If your plan is “I’ll do situps until my belly looks different,” you’re likely to be disappointed. Training the abs is real, but spot fat loss isn’t how bodies work. Situps can build muscle endurance, yet they don’t override nutrition, overall activity, sleep, and total training volume.
There’s also a comfort factor. Situps ask the spine to flex repeatedly. Some people feel fine with that. Others feel pinching in the front of the hips or stiffness in the lower back. If you sit all day, your hip flexors may already be tight and overworked. Piling on lots of situps can make that pattern louder.
When situps make sense
Situps can earn a spot when at least one of these is true:
- You’re preparing for a situp test and need practice under the same rules.
- You can do them with calm breathing, no neck tugging, and no back irritation.
- You want a small dose as part of a mixed core plan, not your whole plan.
When situps are a poor pick
Situps are often a miss when any of these show up:
- Your lower back feels worse during or after sets.
- Your hips feel like they’re doing the work while your abs feel “off.”
- Your neck gets sore, or you feel yourself yanking your head forward.
- Your goal is steadiness for sport lifts, running posture, or day-to-day bracing.
If that sounds like you, swap situps for drills that train the core to hold position. Mayo Clinic describes core training as getting the muscles of your trunk, hips, and lower back to work together for balance and stability, which is the job many people actually want. Why you should strengthen your core muscles.
What “effective” looks like in real training
A better question than “Are situps effective?” is “Effective for what outcome?” Here are practical outcomes you can measure without fancy gear:
- You feel steadier: carrying, pushing, pulling, walking uphill, climbing stairs.
- Your trunk control improves: you can keep ribs down and pelvis steady during movements.
- Your back feels calmer: fewer flare-ups after long days or training.
- You can repeat quality reps: no rushing, no breath-holding panic, no neck strain.
Notice what’s missing: “My abs burn.” Burn can happen with great training and with messy training. It’s a signal, not a scorecard.
Another thing to keep straight: abs are not a single muscle. Your trunk includes muscles that flex, rotate, resist rotation, and resist extension. If all you do is flexion reps, you’re leaving out big pieces of what keeps you steady.
How to do situps with less wear and more return
If you’re going to do situps, do them like you mean it. Sloppy reps often turn into hip-flexor reps plus neck tugging. Clean reps feel slower, tighter, and more controlled.
Setup that helps most people
- Pick a surface that’s not rock hard. A mat is fine.
- Bend knees so feet are flat, unless your test requires a different setup.
- Keep hands light: crossed on chest or fingertips by temples. Avoid lacing fingers and pulling.
- Start with a small curl to get ribs moving toward hips, then continue up.
Rep cues that clean things up
- Exhale as you rise. Keep the exhale steady.
- Move like you’re rolling up, not snapping up.
- Pause for half a beat at the top, then lower with control.
- Stop a set when your neck starts doing extra work.
If you want a research-backed reminder that ab training is broader than one move, the American Council on Exercise has published work comparing common ab exercises and devices, with a focus on muscle activation and practical outcomes. ACE ab exercise research summary (PDF).
Core exercises that often beat situps for carryover
If you only train one pattern, your body gets good at that pattern and stays average at the rest. A steadier plan mixes anti-extension, anti-rotation, and controlled flexion. That blend tends to feel better for many backs and hips, and it often carries into sports and daily tasks.
Use the table below to pick moves that match your goal and your tolerance. Mix two or three of them per session, two or three days per week, then progress slowly. General training guidance from the American College of Sports Medicine supports doing muscle-strengthening work at least two days per week, which includes core training as part of your strength plan. ACSM physical activity guidelines.
Exercise selection table
| Exercise | Main challenge | Good fit when |
|---|---|---|
| Situp | Trunk flexion endurance + hip flexors | You need situp skill or tolerate flexion well |
| Crunch | Short-range trunk flexion | You want flexion work with less hip-flexor load |
| Forearm plank | Anti-extension (resist arching) | You want steadiness for posture, lifts, running |
| Side plank | Anti-lateral flexion + obliques | You want better trunk control and hip stability |
| Dead bug | Ribs-down control while moving limbs | You want core control with low spinal stress |
| Bird dog | Anti-rotation + coordination | You want steadiness while arms and legs move |
| Hollow hold | Anti-extension with long lever | You want a harder plank-style challenge |
| Farmer’s carry | Bracing under load while walking | You want “real life” trunk strength and grip work |
Notice that situps aren’t “bad” in that table. They’re just narrow. If your plan is narrow, your results are narrow.
A simple plan that keeps situps in their lane
If you like situps, you don’t have to ban them. Put them in a slot where they make sense and keep the dose sane. Here’s a straightforward template you can repeat two or three times per week:
Session template
- Brace drill: 2 sets of 20–30 seconds of plank (or dead bug holds if planks bug your shoulders).
- Control drill: 2–3 sets of 6–10 dead bug reps per side, slow and tidy.
- Carryover drill: 2–4 short farmer’s carries (20–40 meters) with good posture.
- Optional situps: 1–3 sets of 8–15, only if your back and neck feel fine.
Progress by adding a rep or two, adding a few seconds, or adding a little load to carries. Keep one rule: if form slips, the set is done. This keeps core work from turning into sloppy volume.
If you’re chasing a situp test, you can still use this template. Keep the steadiness drills, then add one test-specific block at the end: a couple of timed sets under the same setup you’ll be tested on. That way you build skill without turning every session into max-rep grinding.
Common situp problems and quick fixes
Most situp trouble comes from the same handful of habits. Clean those up and the movement often feels better right away. Use the table as a quick check during your next session.
| What you feel or see | Likely cause | Try this fix |
|---|---|---|
| Neck soreness | Pulling the head forward | Hands on chest, eyes up, chin slightly tucked |
| Hip pinch in front | Hip flexors doing most of the work | Shorten range, use crunches, add dead bugs |
| Lower back feels beat up | Fast reps, poor control on the way down | Slow lowering, smaller sets, add planks |
| Feet popping up | Loss of tension or too much speed | Slow tempo, press feet down, stop before form breaks |
| Only feel it in thighs | Overuse of hip flexors | Exhale on the rise, curl ribs toward hips first |
| Can’t control the top | Using momentum | Pause briefly at the top, then lower for 2–3 seconds |
What to expect after a few weeks
If you train your core two or three times per week with a mix of steadiness drills and a small dose of flexion work, most people notice changes that feel practical:
- You brace faster during lifts and carries.
- Your posture feels easier to hold during long walks or desk days.
- Your core work feels “clean,” with less neck and hip irritation.
- If you keep situps in the plan, your reps often feel smoother, not just higher.
If your only plan is daily high-rep situps, you can still see endurance gains in that single movement. Yet the trade-off is common: nagging discomfort, stalled progress, or a core that’s strong in one groove and average elsewhere.
Decision checklist
Use this quick checklist to decide what to do next:
- If you’re training for a situp test, practice situps, then build steadiness with planks, dead bugs, and carries.
- If situps bother your back or hips, swap them for planks, side planks, bird dogs, and dead bugs, then reassess later.
- If you want visible abs, train your whole body, keep protein steady, manage calories, and treat situps as a small accessory at most.
- If you want daily-life carryover, spend more time resisting motion than making motion.
Situps can be effective, just not magical. Put them in the right job, keep your reps clean, and your core training will feel better and work better.
References & Sources
- Harvard Health Publishing.“Want a stronger core – skip the sit-ups.”Explains why planks and stability-focused drills often outperform classic situps for core training.
- Mayo Clinic.“Why you should strengthen your core muscles.”Defines core training and links it to balance and stability in daily movement.
- American Council on Exercise (ACE).“ACE ProSource: Ab Exercise Research Summary (PDF).”Compares common ab exercises using research framing and muscle-activation discussion.
- American College of Sports Medicine (ACSM).“Physical Activity Guidelines.”Summarizes baseline frequency for strength and endurance training that can include core work.
