One leg weaker than the other? How to fix the imbalance
How to test whether one leg is really weaker, which single-leg exercises close the gap, and a 6-week plan with sets, reps and loads to bring both legs level.
Key takeaways
- A gap of up to 10 percent between legs is normal; test it with a 5-rep split squat before deciding you have a problem.
- Always start with the weaker leg and let it set the reps for the stronger leg.
- Six weeks of single-leg work twice a week closes most gaps; do not drop bilateral squats while you do it.
Almost everyone has one leg that is a bit stronger. You notice it on lunges, when one side wobbles and the other feels solid, or on the leg press when you catch one foot pushing harder. Usually it is the leg you kick a football with, or the one you stand on while waiting for the bus. A small gap is normal. A big one shows up as a crooked squat and, over time, a cranky hip or knee on the side that works harder.
Here is how to check if yours is worth fixing, and the plan if it is.
Test it first
Do a dumbbell split squat, rear foot flat on the floor, with a weight you can do about 8 reps with. Start on the leg you think is weaker. Count the reps to 1 short of failure. Rest 2 minutes, do the other leg.
- Difference of 0 to 1 rep: nothing to fix. Train normally.
- Difference of 2 to 3 reps: a mild gap. The plan below will close it.
- Difference of 4 or more reps, or you cannot balance on one side at all: a real gap. Same plan, but take 8 to 10 weeks and go lighter.
Also note anything that hurts on one side only. Pain that is sharp or has been there for weeks is a reason to see a physiotherapist before loading it, not a reason to train harder.
Why two-leg exercises will not fix it
In a back squat or leg press, the strong leg quietly does 55 percent of the work and nobody notices. The weak leg never gets enough stimulus to catch up. You need exercises where each leg has to do its own job, with no help.
The three rules
- Weaker leg first. Always. You are fresh and you give it your best effort.
- Weaker leg sets the reps. If the weak side gets 8, the strong side does 8, even if it could do 12. Otherwise the gap grows.
- Same weight both sides. No extra kilos for the strong leg until the weak one matches it.
The exercises
Bulgarian split squat. Rear foot on a bench, front shin roughly vertical. The best single exercise for this; it is a quad and glute builder and also a balance test.
Single-leg leg press. One foot in the middle of the plate. Use about 40 percent of your two-leg weight to start. Good on busy days because the leg press line moves fast when you are only doing one set per side.
Step-ups. Onto a bench at knee height, driving through the heel of the top foot, not pushing off the floor with the bottom foot. Slow on the way down.
Single-leg Romanian deadlift. Light dumbbell, free hand on a rack for balance. This is for the hamstrings and glutes and also shows you which hip is stiffer.
The 6-week plan
Add this to your usual leg day and to one other day in the week, after your main lifts. Keep your back squat or leg press in the plan; this is on top, not instead. Loads are for someone who split-squats 10 kg dumbbells for 8 on the weak side.
| Weeks | Exercise | Sets x reps per leg | Load |
|---|---|---|---|
| 1 to 2 | Bulgarian split squat | 3 x 8 | 8 kg dumbbells |
| 1 to 2 | Single-leg RDL | 2 x 10 | 8 kg, one hand |
| 3 to 4 | Bulgarian split squat | 3 x 10 | 10 kg dumbbells |
| 3 to 4 | Step-ups | 2 x 10 | Bodyweight, 3 sec down |
| 5 to 6 | Bulgarian split squat | 4 x 8 | 12 kg dumbbells |
| 5 to 6 | Single-leg leg press | 3 x 12 | 40 kg |
Retest with the same split squat at the end of week 6. Most people are within one rep. If you are still 2 or more apart, run weeks 3 to 6 again with 2 kg more.
Small things that help
Stand on the weak leg while brushing your teeth. Walk up stairs leading with the weak leg. On the leg press, put a little more attention on the weak foot during normal two-leg sets. None of this replaces the plan but it adds up over a month.
Log each side separately, and in Workout mode Repyra counts the rest timer between sides too, which stops you racing through the strong leg. Treat the weak leg as your limit for everything, and in six weeks you will not be able to tell which was which.
Questions people ask
Is it normal for one leg to be stronger than the other?
Yes. Almost everyone has a dominant leg and a gap of up to around 10 percent is common. It is worth fixing when one side wobbles badly, gets 3 or more fewer reps, or your squat visibly shifts to one side.
Should I stop doing squats until the imbalance is fixed?
No. Keep your two-leg lifts and add single-leg work on top. Dropping squats slows your overall progress and does not speed up the fix.
How long does it take to fix a leg imbalance?
For a mild gap, about six weeks of single-leg work twice a week. A larger gap can take 8 to 12 weeks. Pain on one side that does not improve should be checked by a physiotherapist.
