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Sit-ups vs crunches: The core exercise that actually builds stronger abs

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Sit-ups vs crunches: The core exercise that actually builds stronger abs

If you’re a little hazy on the difference between sit-ups vs. crunches, you’re not alone. They both strengthen your core, but the details on how they differ and the benefits of each can be confusing.

“The main difference between the two is that unlike a sit-up, in a crunch, the lower back never leaves the floor,” explains Katharine Glazer, CPT. Basically, a crunch is a more targeted and isolated exercise that only works your rectus abdominis (primarily your upper abs).

A sit-up, on the other hand, has a larger range of motion and targets multiple muscle groups at the same time—rectus abdominis, hip flexors, transverse abdominis (deep core muscles), obliques (side abs), and lower back muscles. By raising your torso fully off the ground, you’re recruiting more muscles.

There’s a lot more to know about the great crunches vs. sit-ups debate. Keep reading for the benefits and risks of both sit-ups and crunches, plus how to nail your form and which one deserves a slot in your routine, according to experts.

Meet the experts: Olivia Amato is a certified personal trainer and bike, tread, boot camp, and strength instructor for Peloton. Katharine Glazer is a certified personal trainer. Amanda Hart is a NASM- and ACSM-certified personal trainer and holistic health coach with 12 years of fitness experience. Kristina Earnest, CPT, has more than a decade of experience leading cycling and strength classes and founded Kristina Earnest On Demand.

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Sit-ups vs. crunches: Which move is better?

That depends on the muscle(s) you want to target, Glazer says. “Every body has unique demands and requirements, there is no one size fits all.”

  • If you’re looking to get the most bang for your buck and work multiple muscle groups at once, then sit-ups have an edge.
  • Aiming for intense muscle isolation instead? Crunches could be your jam.
  • But, some trainers actually prefer other abs exercises over sit-ups and crunches (more on that soon!).

Benefits of sit-ups

  • Work *multiple* muscle groups. Sit-ups help you sculpt your abs (and more!) from lots of angles at once when done with proper form, says Olivia Amato, CPT, a Peloton instructor.
  • Improve stabilisation. When you engage your core muscles, you’re improving your balance and steadiness, otherwise known as “stability,” says Kristina Earnest, CPT. With sit-ups, you’re lifting your whole torso from the ground which engages your balance-focused muscles like your abs, hip flexors, legs, back, and neck, adds Glazer.
  • Better posture. Sitting and standing a bit straighter is a bonus of engaging all those stabilising muscles, Amato adds.
  • Increase flexibility. Sit-ups, when done properly, loosen up both your spine and your hips. That motion helps to increase flexibility, explains holistic health coach Amanda Hart, CPT. Better flexibility snowballs into other perks, like leveled-up performance and fewer injuries.

How to do a proper sit-up

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  1. Lie on your back with knees bent at 90 degrees and feet flat on the floor. Place your fingertips on the back of your ears, with elbows bent and pointing out to the side.
  2. Take a deep inhale, then exhale as you contract your core muscles and lift your torso off the ground. Continue until your chest is as close to your thighs as possible. (Though if you don’t make it all the way there, no worries!)
  3. With a smooth and steady motion, inhale as you lower back down to the starting position. That’s 1 rep. Start with 10 reps and add as you feel more confident.

Form tip: “I love doing sit-ups when I have a table to anchor my feet on or a workout buddy holding my feet down with their hands,” says Amato. “This usually ensures proper form because you don’t have to worry about keeping your feet on the ground on top of everything else.”

Sit-up variations to try

Boxer sit-up

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  1. Start lying on your back with your knees bent, feet flat on the ground, and hands in fists at your chest.
  2. Take a deep inhale, then exhale as you contract your core muscles and lift your torso off the ground. Continue until your chest is as close to your thighs as possible.
  3. Punch forward, fully extending your left arm with the knuckles facing forward and palm facing the ground.
  4. Repeat with the right arm.
  5. Slowly lower back down to the floor. That’s 1 rep.

Sprinter sit-up

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  1. Start lying on back with hands by sides and legs extended straight on floor.
  2. Explosively sit up, bringing right knee toward chest, right arm back, and left arm forward at a 90-degree angles.
  3. Reverse the motion with control and repeat on the other side. That’s 1 rep.

Slam ball sit-up

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  1. Lie on your back with your legs bent and feet flat on the ground.
  2. Hold the slam ball above your chest with your arms fully extended.
  3. Engage your core muscles and elevate your torso to perform a sit-up. Hold the slam ball overhead as you bring your body up to a seated position.
  4. Lower yourself back to the starting position, making sure you keep the entire motion controlled. That’s 1 rep.

Benefits of crunches

  • Strong upper abs. Crunches isolate the upper abdominals and are great when aiming for high rep counts, says Amato. “I find that crunches are a move I can do continuously because they’re a simple, low-impact exercise,” she explains.
  • Easy to master form. “With crunches, you just need to focus on lifting your head and shoulders off of the floor while supporting your neck, so it’s easier to get the move down and perform without feeling muscle pain,” says Amato.
  • Low risk of injury. Crunches involve a small range of motion, so the risk of injury is also small. Lift higher up off the ground and your hip flexors might begin to activate, putting stress on the spine, Hart says. The minimal movement required for crunches allows you to strengthen your core without putting strain on your back.

How to do crunches with proper form

a woman is wearing athletic clothing and is working out at the gym she is doing sit ups and abdominal crunches

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  1. Lie on your back with knees bent at a 90-degree angle, keeping your feet flat on the floor.
  2. Place your fingertips on the back of your ears, elbows bent and pointing out to the side.
  3. Take a deep breath in, contract your core muscles, and then lift only your head and shoulder blades from the ground, exhaling as you rise. (Keep your chin tucked, but not touching your chest, and let your head be heavy in your palms to put more work into your abs.)
  4. Inhale as you lower to starting position. That’s one rep. Start with 10 reps and, if you feel like you’ve got the hang of things, keep goin’ for 20 to 30.

Pro tip: “Crunches can sometimes feel repetitive, but I find that when they do, I just add a twist—pointing one elbow toward opposite knee—to spice things up or crunch to the beat of a song,” Amato says.

Crunch variations to add to your routine

Bicycle crunch

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  1. Lie on your back with knees at a 90-degree angle and feet flat on the floor.
  2. Place your fingertips on the back of your head with elbows bent and pointing out to the side.
  3. Exhale and bring right elbow to left knee while extending right leg straight, rotating torso, and bringing left elbow to touch the ground.
  4. Inhale as your return to start and repeat on opposite side. That’s 1 rep.

Reverse crunch

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  1. Start lying on back with hands by sides and feet lifted off the ground at a 45-degree angle, toes pointed. Press your lower back into the ground and keep your arms at your sides.
  2. Brace your core, push down into arms, and exhale as you curl your knees toward your chest until hips lift off mat.
  3. Inhale and slowly return to the starting position. That’s 1 rep.

Frog crunch

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  1. Lie on your back with your arms extended at your sides.
  2. Bring your feet into a tabletop position, with your heels pressed together.
  3. Extend your legs out at a diagonal, keeping your heels close together.
  4. Bend knees and bring heels back toward your body. That’s 1 rep.

How do other ab exercises compare to crunches?

It’s clear crunches and sit-ups are worth your time, but that doesn’t mean they’re always the gold-standard. In fact, some trainers prefer other abs exercises like planks. Why? “Both crunches and planks have the ability to engage the rectus abdominis and the obliques, however, the plank also targets the erector spinae, glutes, hip flexors, quads, and deltoids, which makes it an excellent compound movement and more bang for your buck,” says Earnest.

What’s more, crunches and sit-ups can put significant pressure on the neck, says Earnest, which you won’t experience as much in a plank.

It’s also worth incorporating rotational core exercises into your routine since they strengthen your lower back, increase mobility, and work the obliques, says Earnest. This includes any exercise with a turning motion of your body such as Russian twists, wood chops, and reverse bicycles.

So, are crunches or sit-ups a better workout?

Both can help you build abdominal strength, and each exercise comes with its own set of pros and cons. Assess which might be best for your skill level and safety, then get to work.

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Keep in mind, there’s a greater risk of injury with sit-ups: “The problem with sit-ups is that it’s very difficult to do the exercise correctly without rounding the lower back, which increases stress on the lumbar spine,” explains Glazer.

For this reason, “trainers tend to have their clients avoid sit-ups to decrease the risk of injury,” she says. That’s also why Hart prefers crunches. “There is less flexion and extension of the spine, which means less chance for injuries,” she says.

Crunches are super beneficial when it comes to sculpting the top of your six-pack, but that’s actually *also* their downfall. Crunches *only* target your upper abdominals. “The problem with crunches is that since the hips and legs are stationary, you’re not fully activating the lower abdominals, nor are you engaging the obliques,” Glazer explains.

Bottom line: Crunches and sit-ups both come with pros and cons. And there are a plethora of other abs exercises to consider working into your routine as well.


Headshot of Madeline Howard

Madeline Howard is a writer, editor, and creative based in Brooklyn. Her work has been published in Esquire, Nylon, Cosmopolitan, and other publications. Amongst other things, she was formerly an editor at Women’s Health. Subscribe to her newsletter ‘hey howie’ at madelinehoward.substack.com.

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Headshot of Andi Breitowich

Andi Breitowich is a freelance writer who covers health, fitness, relationships, beauty, and smart living. She is a graduate of Emory University and Northwestern University’s Medill School of Journalism. Her work has appeared in Women’s Health, POPSUGAR, Food & Wine, What To Expect, Cosmopolitan, Men’s Health, and elsewhere. As a former collegiate pole vaulter, she loves all things fitness and has yet to meet a group workout class she doesn’t like.

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Are Upright Rows Bad for Shoulders? How to Build Bigger Delts Without Injury – Muscle & Fitness

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Are Upright Rows Bad for Shoulders? How to Build Bigger Delts Without Injury – Muscle & Fitness

The upright row, depending on your perspective, is either the best exercise for your delts and traps or a flat-out shoulder wrecker. It’s an exercise with a bad-boy reputation.

People base its reputation on the standard barbell version, where lifters raise their elbows high above shoulder level and internally rotate the shoulders. This position increases the risk of subacromial impingement, the painful compression, irritation, or rubbing of the rotator cuff tendons and bursa within the shoulder joint.

But that’s only part of the story, because the arguments focus on the barbell version of it: too much height, too narrow a grip, and not enough control. That matters because research doesn’t support scrapping the upright row.

The real issue isn’t good vs. bad—it’s whether we’re judging this lift fairly. Here, with the help of a few of my coaching friends, we’ll explore one of the more misunderstood lifts in the weight room.

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How the Upright Row Earned Its Reputation

When the elbows rise past shoulder height, the shoulder complex is placed in a compromised position, raising concerns about subacromial impingement. That’s why it gets its fair share of criticism. “From a biomechanical standpoint,” explains Matt Wenning from Wenning Strength. “You’re combining shoulder abduction with internal rotation under load. That position reduces subacromial space and increases compressive stress on the supraspinatus tendon and subacromial bursa.”

Here’s the flip side. The upright row’s reputation comes from one variation. That label is then applied to every version of it, even though research suggests the issue stems from excessive elevation, internal rotation, and poor execution. That is how the lift became hated: One version became the whole story.

Why Upright Rows Get a Bad Reputation

No exercise is perfect, and most carry a certain amount of risk, and the upright row is no different.

  • Shoulder Risky Business: The arms rise while the shoulders stay internally rotated. That can become a problem because the shoulder needs to externally rotate to keep the movement smooth and give the shoulder structures enough room. When that doesn’t happen, the mechanics can get messy, especially as the elbows keep rising.
  • Increases Subacromial Impingement Risk: The concern becomes more serious when the elbows reach or exceed shoulder height. According to this study, the ranges in which the greatest degree of impingement occurs overlap with the ranges in which many lifters perform the upright row. The classic “pull it high” coaching cue pushes the movement into the exact zone where some shoulders start to complain.
  • There Are Simpler Alternatives: If your goal is to build the delts and traps, there are easier ways to get there. According to Wenning, “You can get the same or better hypertrophy stimulus with face pulls, high pulls, cable lateral variations, or movements that allow the scapula to upwardly rotate without being forced into internal rotation under load.”

That makes the upright row feel optional, and honestly, it is. But optional does not mean worthless. Let’s see what the research says.

Are Upright Rows Actually Dangerous? (Science Explained)

The research-based answer is more nuanced than the internet’s usual “good exercise” or “bad exercise” debate. This NSCA study does not support throwing the upright row away. The barbell version becomes problematic when you pull your elbows too high while your shoulders remain internally rotated. The study also shows that the upright row remains safe and effective—if you use proper precautions.

“If I program it at all,” explains Wenning, “I modify it with a wider grip to reduce internal rotation demand, pull height limited to lower chest or sternum, with a controlled tempo, and with a lower volume and load.” Based on the details of McAllister et al.’s study, a wider grip increases deltoid and trapezius activity while reducing biceps involvement. That matters because it suggests the upright row is not a single fixed exercise. Small setup changes can alter the training effect. So, if the goal is to get more deltoid and trapezius stimulus, a wide-grip version makes more sense than the narrow-grip style many lifters default to.

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Other studies suggest people have exaggerated the risk of shoulder impingement. “Shoulder impingement doesn’t seem to be a real problem,” according to Dr. Allan Bacon, owner of Maui Athletics. “A study by Giphart et al. used fluoroscopy to observe what happens inside healthy shoulders during arm elevation. They found that the tendon most people worry about had already moved out of the ‘danger zone’ before the arm even reached shoulder height.”

Here’s the main takeaway: Range of motion matters. Stop the pull at or just below shoulder height, rather than raising the elbows well above it. For lifters with a history of shoulder issues, the advice is even more conservative: Shorten the range to a pain-free zone or skip the lift altogether. That gives us a much smarter takeaway than “never do upright rows.”

Upright Row Benefits

So far, you’ve heard why you shouldn’t do them, but here’s why you should.

Exercise Efficiency

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Upright row trains the lateral delts and upper traps together, which gives you a lot of muscle-building value from one movement. When performed with a wider grip, you’ll get plenty of muscle-building action in both muscles.

Ability to Train The Lateral Delts Heavy

Most delt work is either isolation-heavy, like lateral raises, or more pressing-dominant, where the front delts are the emphasis. The upright row sits in a useful middle ground, allowing you to train the shoulders and traps together without performing the overhead press or endless sets of raises.

Changing Muscle Emphasis

The barbell locks you into a specific range of motion, but you can adjust the grip width. A wider grip increases activity in the deltoids and trapezius while decreasing biceps engagement, placing the shoulder joint in a less compromised position.

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Exercise Flexibility

You have options regarding the upright row. Grip width, range of motion, and tool choice can all change how the lift feels. A straight bar, EZ-bar, cable, rope, or dumbbells can create different movement paths and levels of comfort.” I absolutely love dumbbell single-arm high pulls,” says Bo Babenko, DPT at Fit Care Physio. “Think the ‘faster up, controlled down’ concept is key, and the wider range of motion a unilateral variation allows is beneficial for the shoulder joint.”

Who Should Avoid Upright Rows?

When you shake off the good-or-bad mindset about exercise, it’s about whether it’s a good fit or not.

  • If you want bigger delts and traps but the movement doesn’t bother you, go for it. It fits best as an accessory exercise for intermediate and advanced lifters who have enough shoulder awareness to control the bar path, stop at the right height, and avoid ego taking over.
  • The upright row isn’t an all-or-nothing exercise. If you’re willing to modify rather than force the standard version, then give it a shot. That means using a grip width that feels good to you, keeping the bar close, or using a different tool altogether. For these lifters, the upright row can be a productive tool, not a shoulder trap waiting to happen.
  • But if you have a history of shoulder impingement or rotator cuff issues, or if the movement gives you pinching, pain, or an ache during or after the set, don’t do it. Beginners who do not yet have the awareness to control their shoulder position are also better off using an alternative that Wenning suggested.
  • If lateral raises, cable variations, shrugs, or carries train your delts and traps better with less risk and less hassle, there is no medal for performing upright rows.

Programming Upright Rows for Muscle Growth

The upright row works best as an accessory lift because it’s a muscle-building exercise that rewards control, not chaos. This lift doesn’t reward ego lifting, ugly reps, or chasing numbers. Be honest about load, and progress only when the weight feels easy.

For Muscular Endurance: 2-3 sets of 12-20 reps.

For Strength & Muscle: 3-5 sets 6-12 reps.

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Upright Row: Risk vs Reward Breakdown

The upright row lives in the yellow-light category. The risk is real because:

  1. The barbell version can place the shoulder in a less forgiving position, especially when lifters pull the elbows too high, use a narrow grip, or pile on load without enough control.
  2. The margin for error is smaller than in many other shoulder exercises, which is why it has drawn more suspicion than a lateral raise or shrug.

But the rewards are there, too. It trains the delts and upper traps hard; it may fill a unique multijoint role for the middle deltoid, and a wider grip increases involvement of the delts and traps. That makes it a good option for lifters who tolerate it well.

The real risk-versus-reward verdict is this: the upright row offers moderate risk and moderate-to-high reward. If you can perform it pain-free, use a sensible grip, and use a pain-free range of motion, the reward can outweigh the risk. If every rep feels like a no, the cost is too high, and another variation is warranted.

Final Verdict

The upright row is not all bad for your shoulders, but it is not idiot-proof either, because thinking that more is better is a bad long-term move. The risk to your shoulders is real, and pretending otherwise is dangerous.

But that doesn’t mean you should scrap it. Use a controlled range of motion, a sensible grip, and a moderate load to make this lift an effective delt and upper trap builder. The upright row is neither the villain it’s made out to be nor a bolder shoulder hero. Whatever your choice, choose wisely.

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I tried the 10-minute mobility workout a strength trainer has been doing for over 20 years—here’s why I’ll be making it a permanent fixture in my training program

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I tried the 10-minute mobility workout a strength trainer has been doing for over 20 years—here’s why I’ll be making it a permanent fixture in my training program

I don’t normally do mobility workouts. Instead, I focus on my running and strength training programs.

But mobility work shouldn’t be an optional extra. It’s something all of us would benefit from doing.

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Maintaining an exercise regimen benefits my husband with hemophilia

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Maintaining an exercise regimen benefits my husband with hemophilia

My husband, Jared, first set foot in a gym just months into our relationship. It wasn’t some grand fitness decision — just curiosity. What would it feel like to work out? That question led us to a small, hole-in-the-wall bakal gym near his university — a Filipino term for a no-frills neighborhood gym, often pieced together with improvised machines, rusted plates, and years of wear and tear. We kept going back anyway.

What started as something casual became a rhythm we carried through his college years, then into our home, and eventually into our marriage. Even during my pregnancy — against popular opinion — I kept showing up alongside him.

But for Jared, it wasn’t just about aesthetics, routine, or even discipline. It was about necessity.

Living with hemophilia means learning early on that your body has limits. Joints can be vulnerable in ways other people don’t have to think about. Injuries don’t always resolve quickly or cleanly. And even with treatment, there’s still a quiet responsibility to take care of your body in a way that reduces risk where possible.

For Jared, the gym became one way of doing that. Not to “fix” his condition, but to support his body so it could carry him through everyday life. Stronger muscles meant more stability around his joints, more control over how he moved, and fewer moments of uncertainty.

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Working out wasn’t about pushing past his condition. It was about working with it.

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When stopping feels like the easier choice

So when Jared burned his hand earlier this year, it would have been easy — understandable, even — to stop. It would’ve seemed logical to wait until things felt normal again (if they ever would).

But recovery didn’t look like rest. It took the form of occupational therapy sessions that left him screaming and writhing in pain behind closed doors. The goal was to make the burned skin flexible again, reduce contractures, flatten keloids, and restore as much movement as possible. It wasn’t a process anyone would describe as gentle.

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In many ways, that alone was already more demanding than any workout he’d done before.

And when he was discharged from the hospital in January, the effects of disuse were hard to ignore. His right wrist — normally thick and strong — had visibly shrunken. The muscle loss was immediate, almost startling.

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So he started small. Basic movements with 3-pound dumbbells. In those early days, even holding the weight was a struggle. His grip strength was virtually nonexistent. But he kept going.

Nearly five months later, things look different. He’s back to following full-body workouts on YouTube. His movements are steadier and stronger. And little by little, the strength has come back. These days, he can curl 12-pound dumbbells with his burned and contracted hand — something that would have felt out of reach not too long ago.

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Not starting from zero

I’ve realized over time that hemophilia, for Jared, isn’t something that takes him out of the equation. If anything, it demands that he stay in it.

There’s a kind of structure that comes with knowing your body has limits. You pay attention differently. You learn what works and what doesn’t. You don’t always have the luxury of being careless — so you become deliberate instead.

And in that way, movement becomes less about motivation and more about maintenance. Less about aesthetics and more about function.

The burn injury could have interrupted that. In some ways, it did. But it didn’t erase the foundation he had already built. If anything, it made it clearer why that foundation mattered in the first place.

Because when something does go wrong — when there’s an injury, a setback, a moment when your body doesn’t cooperate — you’re not starting from zero. You’re working from something that’s already there.

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That doesn’t make it easy. But it does mean he never has to start from nothing.


Note: Hemophilia News Today is strictly a news and information website about the disease. It does not provide medical advice, diagnosis, or treatment. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or another qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. The opinions expressed in this column are not those of Hemophilia News Today or its parent company, Bionews, and are intended to spark discussion about issues pertaining to hemophilia.

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