Exercise guide
Smith Bent Knee Good Morning
- Intermediate
- Compound
- Rep-based
- Back
- Hips
- Lower back
The Smith Bent Knee Good Morning is a powerful posterior chain exercise that emphasizes the glutes and erector spinae by using a hinge pattern with fixed stability. The slight knee bend allows for a greater range of motion at the hips, shifting more load onto the glutes compared to the straight-leg version.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Set the Smith machine bar to upper-trap height and stand with your feet shoulder-width apart.
- Step under the bar, resting it across your traps (not your neck), and unrack it with a firm overhand grip.
- Maintain a slight bend in your knees and engage your core to create a rigid torso.
- Pull your shoulder blades back and down to create a stable shelf for the bar.
How to do it
- Inhale and initiate the movement by pushing your hips back as far as possible while keeping your shins nearly vertical.
- Lower your torso under control until it is roughly parallel to the floor, or until you feel a deep stretch in your hamstrings and glutes.
- Exhale and drive your hips forward to return to the starting position, focusing on pulling with your glutes and lower back.
- Maintain a controlled tempo, taking 2-3 seconds on the descent and 1 second to return to the top.
Form checklist
- Keep your spine neutral; do not allow your lower back to round at the bottom.
- Maintain the same slight bend in your knees throughout the entire movement.
- Keep your weight distributed through your mid-foot and heels, not your toes.
- Ensure your head stays aligned with your spine by looking at a spot on the floor a few feet in front of you.
Pro tips
- Think about 'pushing the wall away' with your glutes to maximize the horizontal hip displacement.
- Focus on the mind-muscle connection by squeezing your glutes hard at the top of the movement without overextending your lower back.
Make it harder
- Add a 2-second pause at the bottom of the hinge to eliminate momentum and increase time under tension.
- Perform the movement with a 'top-half' range of motion for high-repetition burnout sets to target the erectors.
Frequently asked
- What muscles does the smith bent knee good morning work?
- The smith bent knee good morning primarily targets the erector spinae, glutes, and hamstrings, and also works the abs and obliques as secondary muscles.
- What equipment do you need for the smith bent knee good morning?
- The smith bent knee good morning uses smith machine.
- Is the smith bent knee good morning good for beginners?
- The smith bent knee good morning is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.
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