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


Required Equipment

45-Degree Back Extension Muscles Worked
Primary
Spinal Erectors (erector spinae); Hamstrings; Glutes (gluteus maximus)
Secondary
Deep Core (transverse abdominis); Lower Back (quadratus lumborum)
45-Degree Back Extension Variations and Alternatives
How to do the 45-Degree Back Extension
Setup:
Position the hyperextension bench at a 45-degree angle.
Adjust the foot pads of the bench to secure your feet comfortably, ensuring they are snug but not overly tight.
Starting Position:
Lie face down on the bench with your hips resting on the edge.
Your body should form a straight line from your head to your heels, with your legs extended and your feet secured under the foot pads.
Cross your arms over your chest or place your hands behind your head, whichever feels more comfortable.
Movement:
Begin with your torso parallel to the ground. This is your starting position.
Slowly lower your upper body towards the ground by bending at the hips while keeping your back straight. Go as low as comfortable without losing form.
Hold the lowered position momentarily, feeling a stretch in your back.
Return to Start:
Engage your lower back and hamstring muscles to lift your body back up to the starting position.
Ensure you are raising your torso in a controlled manner, avoiding any jerking motions.
Return to the parallel position, ensuring your body remains straight.
Repetitions:
Perform 10 to 15 repetitions, keeping the movements smooth and controlled throughout.
Tips:
Focus on engaging your core throughout the exercise to maintain stability.
Ensure your neck is neutral by keeping your gaze towards the ground.
If you're a beginner, start with fewer repetitions and gradually increase as you build strength.
Safety:
Avoid rounding your back during the movement to prevent strain.
If you feel any sharp pain, stop immediately and reassess your form or consult a trainer.
🤔 At home?
You can use your squat-rack or smith-machine in a pinch.
Setup a barbell at about waist height.
Position your feet against a couple heavy weight or objects to brace your feet.
Lean over the bar and hinge your hips over it in slow controlled motions.
- Ben Patrick (KneesOverToes)
45-Degree Back Extension FAQs
What muscles does the 45-Degree Back Extension work?
The 45-Degree Back Extension mainly works the lower back, hamstrings and glutes & hips, with help from the core. The main muscles are the erector spinae, hamstrings and gluteus maximus.
What equipment do you need for the 45-Degree Back Extension?
Hyperextension bench.
Is the 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 45-Degree Back Extension go on?
It belongs on leg day in a push/pull/legs routine.
What are some 45-Degree Back Extension variations and alternatives?
Similar exercises include the 45-Degree Back Extension with Scapular Adduction, 45-Degree Hip & Glute Focused Extension, 45-Degree Twisting Hyperextension and Machine 45-Degree Back Extension.
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