Machine 45-Degree Back Extension
Strengthen your lower back and glutes with the 45-Degree Back Extension! A simple, effective exercise for a stronger posterior chain.
The Machine 45-Degree Back Extension is a compound exercise that mainly works the lower back, glutes & hips and hamstrings, with help from the core. You'll need: hyperextension bench.
Required Equipment

Machine 45-Degree Back Extension Muscles Worked
Primary
Spinal Erectors (erector spinae); Glutes (gluteus maximus); Hamstrings
Secondary
Deep Core (transverse abdominis)
Machine 45-Degree Back Extension Variations and Alternatives
How to do the Machine 45-Degree Back Extension
Position yourself face down on a 45-degree hyperextension bench, making sure your hips are on the edge of the padding.
Secure your feet under the foot pads and adjust the height so that the top of the pads rest just below your calves.
Begin with your body in a straight line, head aligned with your spine, and arms crossed over your chest or alongside your body for balance.
Brace your core and slowly lower your upper body towards the floor, maintaining a straight back throughout the movement.
Lower down until your body is at around a 90-degree angle to your hips (or your upper body is perpendicular to the floor).
Using your lower back and glute muscles, lift your torso back up to the starting position in line with your legs.
Pause briefly at the top of the movement and then lower again with control.
Perform the desired number of repetitions and sets.
Ensure to perform the exercise controlled and smoothly to prevent any undue stress on your lower back. Adjust the difficulty by performing more or fewer reps, increasing the speed (with controlled motion), or by adding weight typically held at the chest or behind the head. Always prioritize form over the weight used or the number of repetitions.
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Machine 45-Degree Back Extension FAQs
What muscles does the Machine 45-Degree Back Extension work?
The Machine 45-Degree Back Extension mainly works the lower back, glutes & hips and hamstrings, with help from the core. The main muscles are the erector spinae, gluteus maximus and hamstrings.
What equipment do you need for the Machine 45-Degree Back Extension?
Hyperextension bench.
Is the Machine 45-Degree Back Extension a compound exercise?
Yes. It's a compound movement, meaning it trains several muscle groups at once rather than isolating one.
What workout day should the Machine 45-Degree Back Extension go on?
It belongs on leg day in a push/pull/legs routine.
What are some Machine 45-Degree Back Extension variations and alternatives?
Similar exercises include the 45-Degree Back Extension, 45-Degree Back Extension with Scapular Adduction, 45-Degree Hip & Glute Focused Extension and 45-Degree Twisting Hyperextension.
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