Movement
What limits your squat depth
If you cannot squat deep without your heels lifting, your chest dropping or your lower back tucking under, stretching your hamstrings will not fix it. Squat depth usually comes down to three things: your ankles, your hips and your control. Here is how to tell which one is yours.
Jeff Shaverian, fitness trainer and physical therapist · 4 min read · Reviewed October 2026
The short answer
Ankles, hips or control
Most depth problems come from stiff ankles, the shape of your hips or a lack of control at the bottom. Three simple tests tell you which. Stiff ankles respond to mobility work and raised heels, hips need a stance that suits them, and control improves with slow, supported squats.
It is rarely your hamstrings
Your hamstrings cross both the hip and the knee. As you squat down, the hip bends and the knee bends at the same time, so the hamstrings barely change length. Tight hamstrings show up when you touch your toes, not much in a squat.
The three limits
Limit 1
Ankles
Your knees need to travel forward over your toes. If the ankle cannot bend enough, your heels lift or your chest drops forward to keep you balanced.
Limit 2
Hips
Hip sockets differ in depth and angle from person to person, and even left to right. Some run out of room early in a narrow stance and pinch at the front.
Limit 3
Control
You reach depth holding on to something, but not on your own or with weight. Your mobility is fine. Your body has not learned to stay balanced at the bottom.
Test yourself
- Knee to wall (ankles). Kneel in a half lunge facing a wall. Keeping your front heel down, push the knee forward to touch the wall, and move the foot back until you only just reach. As a rough guide, if your toes cannot get about 10 centimeters (a hand width) from the wall, your ankles are likely limiting your depth. A big difference between sides matters too.
- Rock back (hips). On hands and knees with a flat back, rock your hips back toward your heels and note where your lower back starts to round. Try again with your knees wider. If wider knees let you go deeper before the back rounds, your hips want a wider squat.
- Goblet hold (control). Hold a light dumbbell or kettlebell at your chest and squat as deep as you can. If the weight helps you get lower than with no weight, the limit is balance and control, not mobility.
What to do about it
| Limit | What helps |
|---|---|
| Ankles | Knee-to-wall rocks every day, 2 sets of 10 per side. Squat with your heels raised on small plates, or in weightlifting shoes, while the ankle improves. |
| Hips | Find your stance: try different widths and toe angles until you reach depth without a pinch. Squat to the depth your hips allow, not someone else's. |
| Control | Goblet squats with a 3 second lowering and a 2 second pause at the bottom. Box squats, lowering the box a little every few weeks. |
How deep do you need to go?
Deep enough for your goal, and no deeper than you can control. For muscle, depth pays off: in a 2019 study by Kubo and colleagues, full squats built more glute and inner thigh muscle than half squats, while the front of the thigh grew about the same. The range is worth earning.
A small tuck of the pelvis at the very bottom is normal for most people. It matters when it is big, when it happens under heavy load on every rep, or when your back complains afterwards. Squat to just above where the tuck starts and build down from there.
And knees past your toes is fine. Stopping the knees from going forward does not make a squat safer. It moves the work to your hips and lower back.
If it hurts
A pinch at the front of the hip at the bottom, or an ache at the front of the knee, needs its own plan. I cover both on Danang Physical Therapy: pain at the front of the hip when you squat and pain at the front of the knee on stairs.
Quick questions
Should my knees go past my toes?
If your ankles allow it, yes. It is a normal part of a deep squat, and stopping it moves the work to your hips and lower back.
Are squat shoes worth it?
If your ankles limit your depth, a raised heel helps right away. For anyone who squats every week, weightlifting shoes are a good investment.
How wide should my stance be?
Wide enough to reach depth without a pinch at the front of the hip. For most people that is around shoulder width, with the toes turned out a little. Your rock back test tells you which way to adjust.
How I coach it
In your first session I run these tests, then find the stance and depth that fit your body today. Over a block we build the range you are missing, and we add load only to the depth you control.
About the author
Jeff Shaverian
Fitness Trainer and Physical Therapist · Da Nang · Phan Công Bình
I coach strength, muscle and fat loss in Da Nang, and I assess how you move, using the Kinesiopathological Model, before I load it. I have coached clients for seven years and worked in rehab for two, in English and Vietnamese.
Sources
- Kubo K, Ikebukuro T, Yata H. Effects of squat training with different depths on lower limb muscle volumes. European Journal of Applied Physiology. 2019;119(9):1933-1942.
- Konor MM, Morton S, Eckerson JM, Grindstaff TL. Reliability of three measures of ankle dorsiflexion range of motion. International Journal of Sports Physical Therapy. 2012;7(3):279-287.
- Fry AC, Smith JC, Schilling BK. Effect of knee position on hip and knee torques during the barbell squat. Journal of Strength and Conditioning Research. 2003;17(4):629-633.
- Horschig A, Sonthana K. Rebuilding Milo. Las Vegas: Victory Belt Publishing; 2021.
This article is general education, not medical advice. Reviewed October 2026.