Step-ups
Step-ups train one leg at a time and, in a randomized trial with rugby players, built strength about as well as back squats, with gains carrying over between the two. Modelling studies show high and load-dependent forces in the glutes, quads and adductors, but no trial has measured muscle growth from step-ups directly.
What the science says
- Builds strength comparable to squats Moderate evidence
Appleby et al. (2019) trained 33 rugby players for 8 weeks with volume-matched back squats or step-ups (6–8 sets of 4–8 reps): both groups improved their trained lift and transferred some strength to the other, with no clear difference in squat gains.
- High glute and quadriceps forces that rise with load Moderate evidence
Kipp et al. (2022) modelled muscle forces in 9 men across loads of 0–75% of body mass: forces in the gluteus maximus, vasti and biceps femoris long head rose with load, often more steeply in the step-up and split squat than in the squat.
- Loads the adductor magnus heavily Moderate evidence
Collings et al. (2026) ranked the step-up in the top tier for the ischiocondylar part of the adductor magnus among eight common exercises, using an EMG-assisted model in 15 people.
- Muscle growth is inferred, not measured Limited evidence
No long-term trial has measured hypertrophy from step-ups; growth is expected from the muscle forces and from unilateral training in general, but it has not been tested directly.
How to do it
Muscles trained: quadriceps, glutes, adductors
- Place the whole foot on the box.
- Drive up through the front foot; keep push-off from the back leg to a minimum.
- Lean the torso slightly forward and keep the knee tracking over the toes.
- Stand fully upright at the top.
- Lower under control rather than dropping off the box.
How to apply it
Pick a box that puts the working thigh about parallel at the start, drive with the front leg, and progress from bodyweight to dumbbells or a barbell.
Who should be careful
Use a stable box at a height you can control; balance, not muscle, usually limits the load at first. Anyone with knee or hip pain should have a physician or physical therapist set their training.
Frequently asked questions
Are step-ups as good as squats?
For strength, they performed comparably in an 8-week trial with rugby players, and gains carried over between the two exercises.
Do step-ups build muscle?
Probably, given the high glute and quad forces, but no long-term trial has measured muscle growth from step-ups.
How high should the box be?
High enough that the working thigh is about parallel to the floor when your foot is on the box.
Scientific references
- Specificity and Transfer of Lower-Body Strength: Influence of Bilateral or Unilateral Lower-Body Resistance Training
- Muscle Forces During the Squat, Split Squat, and Step-Up Across a Range of External Loads in College-Aged Men
- Hip Adductor Muscle Forces during Strength Training and Rehabilitation Exercises
More exercises
- Front squat Moderate evidence
The front squat holds the bar on the front of the shoulders, which keeps the torso more upright and loads the knees less than the back squat while recruiting the thigh muscles about as much.
- Leg press Strong evidence
The leg press builds the quadriceps about as well as free-weight squats and also grows the glutes and adductor magnus, with no balance or spinal-loading limit.
- Hack squat (machine) Moderate evidence
The machine hack squat lets you squat deep on a fixed track with your back supported, which makes it easy to push the quads close to failure.
- Romanian deadlift Moderate evidence
The Romanian deadlift is a hip hinge that loads the hamstrings and glutes at long muscle lengths, and trials of stiff-leg deadlifts and similar hip-extension exercises show real hamstring growth, mainly in the semimembranosus and biceps femoris long head.
- Conventional deadlift Moderate evidence
The conventional deadlift trains the whole posterior chain and grip and is a core strength lift, but research on its growth effects is thin: trials either use other deadlift variants or measure strength rather than muscle size.
- Barbell hip thrust Moderate evidence
The barbell hip thrust grows the glutes, and it does so with little growth of the quads or adductors, which makes it a good targeted addition.