Squats don’t make you shorter. You might measure a fraction of an inch less right after heavy lifting, because the discs in your spine compress under load. That height returns after a night of sleep. Properly coached squats don’t damage growth plates or reduce adult height in teens or adults.
The myth hangs on for understandable reasons. Teen lifters hear it in locker rooms, parents remember old warnings about kids and barbells, and beginners feel oddly “squished” after their first serious leg day.
So, do squats make you shorter? Sports medicine research, spine biomechanics, and pediatric guidance from the American Academy of Pediatrics (AAP) all point the same direction, and the details are more reassuring than the gym gossip.
Key Takeaways
- Squats don’t make healthy teenagers or adults permanently shorter when done with decent form.
- Temporary spinal compression after heavy lifting is normal and reverses with sleep.
- Growth plates are at risk from serious injuries and accidents, not from properly supervised resistance training.
- Good technique, gradual load increases, and real recovery keep injury risk low.
- The AAP considers supervised strength training safe and beneficial for kids and teens.
Do Squats Make You Shorter? The Short Answer
No. The small height dip you might notice after squatting is disc compression, the same thing that happens to everyone who stands up in the morning.
Your intervertebral discs make up about a quarter of your spine’s height, and their daily changes can shave up to almost 2 cm (about 0.8 inches), or roughly 1% of total height, before recovering overnight (Scientific Reports via PMC, 2020).
Squats add a little extra compression to that daily cycle. They don’t make it permanent.
Why your height changes during the day anyway
Gravity is the original squat. Every hour you spend upright, your body weight slowly presses fluid out of your spinal discs.
Lying down reverses the process. This is why you’re a bit taller when you wake up and slightly shorter by dinner, whether you went to the gym or spent the day on the couch.
Why Do People Think Squats Make You Shorter?
The myth has a surprisingly specific origin. Researchers in 1960s Japan observed that children doing heavy manual labor tended to be short, and they suspected that lifting heavy loads was damaging the growth plates in their long bones (PowerliftingTechnique.com, 2024).
The problem is that those children also often faced poor nutrition, long work hours, and hard living conditions. Blaming the lifting alone was a classic case of confusing correlation with causation.
Old coaching advice kept the idea alive for decades. Plenty of American parents grew up hearing that weights were for grown-ups, full stop.
Social media did the rest. A viral clip of a teenager claiming he “stopped growing after squatting” gets far more views than a pediatric clinical report, which is unfortunate but not exactly surprising.
How Squats Affect Your Spine and Height
A loaded squat compresses your spine a bit more than normal standing does. The effect is small, predictable, and temporary.
Your discs work like sponges
Each disc has a tough outer ring and a soft, water-rich center. Pressure squeezes some of that water out, and rest lets it soak back in.
A barbell on your back is simply more pressure for a short window. Your spine is built for this kind of axial loading, which is why it bounces back.
What happens after a heavy set
The measured losses are tiny. Squatting has been shown to cause up to 3.59 mm of temporary spinal shrinkage, comparable to what walking causes, and it’s restored after a night’s sleep (PowerliftingTechnique.com, 2024). That’s about one-seventh of an inch.
Normal daily variation is often bigger than anything the gym does. In one study, natural daily height variation averaged 14.4 mm, which exceeded the height change from a 25 km run, and shrinkage reversed during sleep but not during a 20-minute rest right after exercise (British Journal of Sports Medicine via PMC, 1986).
That last detail explains a lot of panicked forum posts. Measure yourself 20 minutes after leg day and you’ll look shorter; measure the next morning and the “loss” is gone.
Long-term lifters don’t show lasting disc damage either. An MRI study found that weightlifters and non-weightlifters had similar morning disc readings and similar daily changes, suggesting weightlifting doesn’t harm discs chronically or acutely (Scientific Reports via PMC, 2020).
Temporary compression vs. permanent height loss
These three things get lumped together online, and they really shouldn’t be.
| Type of change | What causes it | How long it lasts | What it means for you |
|---|---|---|---|
| Daily disc compression | Gravity and normal upright activity | Resets every night | Everyone has it; nothing to fix |
| Post-squat compression | Heavy axial load on the spine | Hours, fully reversed by sleep | Slightly bigger version of the daily dip; mostly a measuring-tape curiosity |
| Growth plate injury | Fractures, accidents, badly unsupervised max lifts | Can be lasting if untreated | Rare, serious, and a supervision problem rather than a squat problem |
The first two rows are the same process at different volumes. The third row is where real concern belongs, and it has almost nothing to do with a well-coached squat.
Can Squats Stunt Growth in Teenagers?
Squats don’t stunt growth in teenagers who train with sensible loads and supervision. The AAP has said so for years.
The AAP states that appropriate strength-training programs have no apparent adverse effect on linear growth or growth plates (AAP, 2008). Its updated clinical report on resistance training for children and adolescents was reaffirmed in November 2024 (AAP, 2020).
Growth plates are areas of cartilage near the ends of long bones where lengthening happens. If you’re curious how much they control final height, NuBest covers whether growth plates in bones determine height.
The real threat to those plates is acute injury, like a bad fall or a fracture. A controlled set of goblet squats isn’t in that category.
Strength training can start earlier than many parents expect. The AAP’s lead author on the report noted that children as young as 5 can build strength with moves like one-legged hops or frog jumps (HealthyChildren.org, 2020).
For a broader look at kids and lifting, see whether weight training stunts a child’s growth.
When Can Squats Actually Lead to Problems?
Squats cause problems mostly when supervision, form, or load goes sideways. The movement itself isn’t the villain.
The AAP warns that unsupervised strength training carries risks including injury to the spinal discs and growth plates, and it doesn’t recommend Olympic lifting, powerlifting, or maximum lifts for children (AAP Care of the Young Athlete handout).
The most common mistakes that raise injury risk tend to show up together, usually in the same tired, ego-driven set.
- Rounded lower back. Losing a neutral spine shifts stress onto the discs.
- Knees caving inward. Poor knee tracking strains the joint and ligaments.
- Too much weight too soon. Jumping ahead of your technique is the classic beginner move.
- Skipping the warm-up. Cold muscles and stiff hips make bad positions more likely.
- Training through exhaustion. Fatigue breaks form faster than most lifters admit.
If any of these sound familiar, a certified strength coach or physical therapist can usually spot the fix in one session.
Benefits of Squats That Support Long-Term Health
Squats are one of the most useful compound exercises you can do. They train your glutes, quads, hamstrings, and core at once.
The bone benefits are the part the myth gets exactly backward. Summaries of the AAP’s 2020 report highlight improvements in bone mineral density, motor skills, and injury prevention from well-designed youth programs (IDEA Health & Fitness Association, 2025).
Stronger legs also pay off in ordinary life. Climbing stairs, getting off the floor, and carrying groceries are all squat patterns wearing street clothes.
There’s a posture bonus too. A stronger back and core help you stand up straighter, which won’t lengthen any bones but can make you look closer to your full height.
How to Squat Safely Without Increasing Injury Risk
Safe squatting comes down to a handful of habits that experienced lifters repeat until they’re boring. Boring, in this case, is the goal.
- Warm up first. Five to ten minutes of dynamic movement and a few light sets gets your hips and ankles ready.
- Master bodyweight squats. Most coaches want clean bodyweight reps before adding a barbell.
- Brace your core. A deep breath and tight midsection help protect a neutral spine.
- Add weight gradually. Small, steady jumps beat big ones that wreck your form.
- Use a power rack or spotter. Safety bars turn a failed rep into a nonevent.
- Pick stable shoes. Flat soles or weightlifting shoes beat squishy running shoes.
- Take rest days. Recovery sleep is also when your discs fully rehydrate.
Teens do best with a qualified coach who knows youth programming. The National Strength and Conditioning Association (NSCA) certifies coaches with this kind of training.
Frequently Asked Questions About Squats and Height
Can heavy squats permanently shrink your spine?
No, not in healthy people using reasonable technique. The compression from squatting reverses with rest, and MRI research on long-term weightlifters hasn’t found lasting disc harm.
Why am I slightly shorter after lifting?
Your spinal discs lost a little fluid under the load. You’ll usually regain it after a full night’s sleep, so measuring right after training gives a misleading number.
Can teenagers safely perform barbell squats?
Yes, with proper coaching and a program matched to their skill level. Max-effort lifts are a different story, and the AAP advises against them for kids.
How long does spinal compression last?
Usually a few hours, fully resolved overnight. A short rest right after training doesn’t seem to be enough to restore it.
Are bodyweight squats safer than barbell squats?
They put much less load on your spine, so they’re the natural starting point. Barbell squats are safe too once your technique is solid.
Can deadlifts make you shorter?
No, deadlifts cause the same temporary disc compression that squats do. It’s just as temporary.
Should older adults avoid heavy squats?
Not automatically. One study found that men aged 18 to 25 and 47 to 60 showed a similar pattern of spinal shrinkage during circuit weight training (Applied Ergonomics, 2005). If you have osteoporosis or a past back injury, check with your doctor or a physical therapist before loading up.
Final Thoughts: Do Squats Make You Shorter?
Squats don’t make you shorter, and they don’t stunt growth when training is coached and sensible. The height dip after heavy lifting is temporary disc compression that sleep takes care of.
Focus on form, add weight slowly, and let recovery do its job. If you’re coming back from an injury or have a spine condition, a sports medicine doctor or physical therapist can help you set a smart starting point.
Jay Lauer is a health researcher with 15+ years specializing in bone development and growth nutrition. He holds a B.S. in Kinesiology and is a certified health coach (ACE). As lead author at HowToGrowTaller.com, Jay has published 300+ evidence-based articles, citing sources from PubMed and NIH. He regularly reviews and updates content to reflect the latest clinical research.