Back Extension vs Good Morning: Which Is Better for You?

If you are weighing up back extension vs good morning, you are really choosing between two ways of training the same chain of muscles: your lower back, glutes and hamstrings. Both are hip hinge exercises, both build a stronger back, and both get skipped by most gym-goers. But they load your body differently, and one is a much safer starting point for beginners.

In this guide I compare the two side by side: how each one works, which muscles do the most work, who should pick which, and how to fit them into a week without overloading your lower back.

Back extension vs good morning: the quick answer

• Back extension: done on a 45-degree or horizontal bench with your hips supported. Your bodyweight is the main load. Easy to learn, easy to scale, very beginner friendly.
• Good morning: done standing, usually with a barbell on your upper back. You bend at the hips with soft knees and stand back up. Higher skill, heavier loading, more demand on bracing.

For most beginners and anyone rebuilding after back stiffness, I start with back extensions. Good mornings come later, once you can hinge well and brace your trunk under load.

How each exercise works

The back extension

You lock your feet under the pads, set your hips just in front of the support and lower your upper body towards the floor. Then you lift back up until your body is in a straight line. The pad takes your hips, so there is no load running down through your spine and legs. That makes it a very controlled way to build endurance in the back muscles. I cover the set-up in detail in my back extension benefits guide.

The good morning

You stand with a bar on your upper back, knees slightly bent, and push your hips back while your chest lowers towards the floor. Your spine stays long and neutral the whole time. You stop when you feel a strong stretch in your hamstrings, often around the point your torso is close to parallel, then drive your hips forward to stand. My good morning benefits article explains the technique step by step.

The key difference is that the good morning puts a long lever on your spine with the weight furthest from your hips. That is why light loads feel heavy, and why technique matters so much.

Muscles worked: which one hits what

Both train the posterior chain, but the emphasis shifts.

• Back extensions tend to work the spinal erectors and glutes hard. If you round slightly at the top and squeeze your glutes, you can bias the glutes more. If you keep a flat back and hinge from the hips, the hamstrings join in.
• Good mornings load the hamstrings strongly in a lengthened position, along with the glutes and spinal erectors working to hold your back still. Your upper back and core also work hard to keep the bar stable.

Put simply: back extensions are great for building endurance and control in the lower back and glutes. Good mornings are better for building hamstring strength and teaching your whole trunk to stay rigid under a load, which carries over to squats and deadlifts.

Which is better for beginners?

Back extensions, for three reasons:

1. Lower skill. The machine guides the movement. You do not have to balance a bar or control your knees.
2. Easy to scale. Start with a short range and arms crossed, then add a full range, then hold a plate to your chest.
3. Lower risk if you get it wrong. A sloppy back extension with bodyweight is far less likely to cause a problem than a sloppy loaded good morning.

If you have never trained the hip hinge, start there before either exercise. My guide to the hip hinge exercise shows how to learn the pattern with a dowel against your back. Once that feels natural, good mornings with an empty bar or a light band are a sensible next step.

Which is better for lower back strength?

Both can help build a stronger, more resilient lower back. The best choice depends on where you are now.

Choose back extensions if

• Your back feels stiff after long days at a desk.
• You want a low-risk way to train your back 2-3 times a week.
• You are new to strength training or coming back after time off.

Choose good mornings if

• You already squat and deadlift with good form.
• Your hamstrings are a weak point.
• You want to improve how well you brace under a bar.

If you have current back pain, a disc problem or pain running into your leg, please see your GP or a physio before doing either exercise. For general stiffness, my article on exercises for lower back pain has gentler starting points.

How to programme them in a week

You do not need both in the same session. Here is how I usually set them up for clients:

• Back extensions: 2-3 sets of 10-15 reps, slow and controlled, at the end of a leg or full-body session. Up to 2-3 times a week.
• Good mornings: 3 sets of 6-10 reps with a light to moderate weight, once a week, early in a lower body session while you are fresh.

A simple example week for a beginner to intermediate lifter:

• Day 1: goblet squats, Romanian deadlifts, back extensions 3 x 12.
• Day 2: upper body.
• Day 3: split squats, good mornings 3 x 8 with a light bar, glute work.

Keep the good morning load well below what you would use for a Romanian deadlift. The longer lever makes it much harder on your back for the same weight. If you want a broader plan, my strength training for beginners guide sets out a full starting programme.

Want help with this? Hinge exercises are where I see the most technique problems, and they are much easier to fix in person. At SYP Fitness I coach 1-to-1, so I can watch every rep, adjust the load and build your back strength safely. Book a free consultation and we can look at your hinge together.

Common mistakes on both

• Over-arching at the top. On back extensions, stop when your body is straight. Swinging past that into a big arch adds stress without adding benefit.
• Going too heavy on good mornings. Ego loading is the fastest way to a sore back. Earn every extra kg.
• Rounding under load. Keep your spine long, ribs down and core braced.
• Rushing. Both exercises work best slow. Take 2-3 seconds on the way down.

If you train in North London and want someone to coach your technique, I work as an injury-safe personal trainer in Archway, focused on busy professionals over 30.

Frequently asked questions

Are back extensions bad for your lower back?

Not when done with control and a sensible range. Back extensions are one of the most common exercises used to build lower back endurance. Problems usually come from swinging, over-arching at the top or adding too much weight too soon. If you have an existing back injury or pain that spreads into your leg, check with your GP or a physio first.

Can I do good mornings without a barbell?

Yes. You can do good mornings with a resistance band looped under your feet and around your neck, a dumbbell held at your chest, or just your bodyweight with hands behind your head. These versions are a great way to learn the pattern before progressing to a barbell, and they are easy to do at home.

Do back extensions work the glutes?

Yes. Back extensions work the glutes as well as the lower back and hamstrings. To bias the glutes more, set the pad slightly lower on your hips, turn your feet out a little, round your upper back gently and squeeze your glutes hard to lift. A flat back version spreads the work more evenly.

Should I do back extensions or good mornings first in my workout?

Do good mornings early in a session while you are fresh, because they need more skill and bracing. Back extensions work well at the end as a finisher or accessory. Avoid doing heavy good mornings straight after heavy deadlifts, as your lower back will already be tired.

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