Small Calves: Why They Won’t Grow and How to Get Bigger Calves

Small calves are one of the few things in the gym that effort does not reliably fix. Plenty of men and women train their legs hard for years and end up with strong thighs, a muscular upper body and lower legs that barely changed. Search for “skinny calves” or “why are my calves so small” and most of what comes back is a workout plan, with the implication that you have simply not found the right one. The research tells a more honest story. Calf size is largely inherited, the shape of the calf is fixed by where the muscle joins the tendon, and the calf muscles respond to training less than most. That does not mean training is pointless, but it does explain why some people hit a ceiling others never see.

This guide explains why calves stay small, what “high” and “low” calf insertions actually mean, how to get bigger calves through training and what to realistically expect, why one calf can end up smaller than the other, and where calf implants or fat transfer calf augmentation fit once training has done what it can. If your concern is the opposite, heavy lower legs with no ankle definition, our guide to cankles covers that instead.

Why Are My Calves So Small?

The visible calf is made of two muscles. The gastrocnemius is the superficial one with two heads, inner (medial) and outer (lateral), and it creates the curved shape you see from behind and from the side. The soleus is a broader, flatter muscle that lies beneath it. Both join the Achilles tendon, which attaches to the heel bone. For a full anatomical picture, see the anatomy section of our calf implants page.

Small, skinny or thin calves usually come down to one or more of four things:

• Genetics. How much muscle your calves carry, and where on the leg it sits, is largely inherited.
• Calf insertion. A short muscle belly that ends high on the leg makes the calf look small even when the muscle is strong.
• Training. Calves need more volume and a fuller stretch than most people give them, and seated calf raises alone do very little for the gastrocnemius.
• A medical cause. Injury, nerve damage, clubfoot or polio can leave one or both calves underdeveloped. This is covered in its own section below.

It is worth ruling out the fourth before assuming the first. A calf that has shrunk noticeably, rather than always being small, or one calf that is suddenly much smaller than the other, should be checked by a GP.

Are Small Calves Genetic? Calf Genetics Explained

Largely, yes. Calf genetics, and calf size genetics in particular, are unusually strong compared with most traits people try to change in the gym. The clearest evidence comes from twin studies, which compare identical twins, who share all their genes, with non-identical twins, who share about half. A Belgian study of 105 pairs of twins aged 10 to 14 measured the circumference of the upper arm, forearm, thigh and calf, and found that 87–95% of the variation between children was explained by additive genetic factors rather than diet, activity or environment [1]. That study was in adolescents rather than adults, but it is consistent with what every coach knows: some people are born with big calves and never train them, and others train them for years with little to show for it.

Genetics also sets the mix of muscle fibre types. In an autopsy study of fibre types across 36 human muscles, the soleus was overwhelmingly made of slow-twitch (type I) fibres, roughly 80–90%, while the gastrocnemius was much closer to half slow and half fast [2]. Slow-twitch fibres are built for endurance, which is exactly what the calf does all day as you stand and walk. They tend to grow less in response to heavy training than fast-twitch fibres, which is part of why the calves lag behind the quadriceps or the chest.

High vs Low Calf Insertion

“Calf insertion” is gym shorthand for where the gastrocnemius muscle belly ends and the Achilles tendon begins. It is the single biggest reason two people with the same training can have calves that look completely different.

A high calf insertion means a short muscle belly that sits high on the leg, with a long stretch of tendon below it. The calf looks like a small ball under the knee, with a thin lower leg beneath it. Many sprinters and jumpers have this shape, because a long tendon stores and returns energy efficiently.

A low calf insertion means a long muscle belly that runs much further down towards the ankle, with a short tendon. The lower leg looks full from knee to ankle, and the calf looks big even at rest.

Training can make either muscle bigger, but it cannot lengthen the muscle belly or move the point where it joins the tendon. Someone with a high insertion can build a rounder, fuller upper calf, but the lower third of the leg will stay slim. This is the most common reason people with “genetically small calves” come to see us: the muscle they have is well trained, and what is missing is length, not size.

Calves Not Growing? Why Calves Are So Hard to Grow

If your calves are not growing despite regular training, you are in good company. Researchers describe the triceps surae, the collective name for the gastrocnemius and soleus, as relatively unresponsive to resistance training and prone to shrinking with inactivity compared with other muscles [3]. There are three practical reasons:

• They are already trained every day. The calves lift your body weight thousands of times a day just by walking. A few sets of calf raises is a smaller relative step up than it would be for an arm muscle that is barely used otherwise.
• The fibre mix favours endurance. The soleus in particular is mostly slow-twitch fibres, which respond less to heavy loading.
• The range of movement is often cut short. Bouncing through half repetitions at the top of a calf raise misses the stretched position where most of the growth appears to happen.

There is also a lot of individual variation in how anyone responds to training. In a study of 585 men and women who all followed the same 12-week arm-training programme, the increase in muscle size ranged from slightly negative to 59% [5]. That study was of the biceps rather than the calf, but it shows how much of the response to any training programme is down to the individual rather than the plan.

How to Get Bigger Calves

If you are wondering how to make calves bigger and have never trained them properly, you have real room to grow them. The evidence points to three things that matter most.

Do standing calf raises, with a full stretch. In a 12-week study where each participant trained one leg with standing calf raises and the other with seated calf raises, the standing leg grew its medial gastrocnemius by 9.2% and its lateral gastrocnemius by 12.4%. The seated leg barely changed at all in either gastrocnemius head, and the soleus grew by a similar small amount in both legs [3]. Straightening the knee stretches the gastrocnemius, and training it at long muscle lengths appears to be what drives growth. Lower all the way into a deep stretch on a step, pause, and push through the full range.

Do enough sets. In a six-week randomised trial of 61 untrained women, those doing 12 weekly sets of calf raises grew their calves by about 12% overall, compared with about 7% for those doing six sets [4]. Most people’s calf training is a couple of rushed sets at the end of a session. Two to three sessions a week, with roughly 10 to 16 hard sets in total, is a reasonable starting point.

Be patient and consistent. Muscle growth is slow everywhere, and slower in the calves. Give a programme at least three months before judging it, and keep a record of calf circumference measured at the widest point, at the same time of day.

These gains are real, but they are single figures to low double figures in percentage terms. For someone whose calves are genuinely small, that is noticeable but rarely transformative. It will not change a high insertion into a low one.

Can You Grow Calves? What Training Can and Cannot Do

Yes, almost everyone can grow their calves to some degree, and people who have not trained them before usually see the biggest change. What training cannot do is:

• Lengthen a short muscle belly or lower a high insertion
• Add fullness to the lower third of the leg if the muscle does not extend that far
• Correct a significant difference between the two legs caused by injury or a medical condition
• Override the genetic range your calves sit in

If you have trained consistently and well for a year or more, and your calves are still out of proportion with the rest of your body, you have probably reached close to what training will give you. That is the point at which people start to ask about calf augmentation, and it is also the right time to ask, because surgery is for the gap that training cannot close, not a replacement for it.

One Calf Smaller Than the Other: Calf Muscle Imbalance and Calf Atrophy

A small difference between left and right is normal. A clear calf muscle imbalance, or calf atrophy where one calf has visibly wasted, is different: it usually has a cause, and it is a separate question from simply having small calves.

Common causes include:

• Clubfoot (talipes). Even after successful treatment in childhood, the calf on the affected side often stays smaller for life.
• Polio. Paralytic polio can leave permanent wasting of the calf on one or both sides.
• Spina bifida and other nerve conditions, including Charcot-Marie-Tooth disease and spinal cord injury, which reduce the nerve supply to the calf muscles.
• Injury. Severe fractures, crush injuries, compartment syndrome or a long period in a cast can leave lasting muscle loss that physiotherapy cannot fully reverse.
• Congenital hypoplasia, where the calf muscles simply did not develop fully.

A calf that is shrinking now, rather than one that has always been small, needs a medical assessment first. Once the cause is known and stable, the difference can often be corrected surgically. For a single smaller calf, an implant on that side alone can restore symmetry. Where there is a large or irregular deficit, standard implants rarely match the other leg well, and a custom implant is designed from a CT scan of both legs. At Centre for Surgery this is done with Mr Metin Nizamoglu and a specialist manufacturer of 3D-designed silicone implants, a service available at only a small number of UK centres.

Skinny Legs in Men and Women: Is It Your Calves?

“Skinny legs” can mean several different things, and it is worth being clear which one you mean before choosing a solution. Searches for skinny legs in men usually describe the second pattern below, while thin calves on otherwise normal legs is the first.

• Skinny calves with normal thighs. The classic high-insertion or genetically small calf. This is what calf augmentation treats.
• Skinny legs overall with a heavier upper body. Often a training imbalance, particularly in men who train the chest and arms more than the legs. Leg training is the answer here, and our guide to the V-taper body explains how upper and lower body proportions work together.
• Thin legs with a soft stomach. Low muscle mass throughout with fat stored centrally, which is closer to skinny fat than to a calf problem.
• Heavy calves with no ankle definition. The opposite problem, where fat around the ankle hides the calf shape. Calf and ankle liposuction treats this, not augmentation.

Calf Implants vs Fat Transfer for Small Calves

There are two surgical ways to add volume to the calf, and they suit different people.

Calf implants are solid silicone devices, firm but flexible, that cannot rupture or leak. At Centre for Surgery they are placed through a 5–7 cm incision hidden in the crease behind the knee, into a pocket beneath the fascia and above the gastrocnemius muscle (the subfascial plane). One implant per leg adds the curve of the inner calf; a second over the outer head adds width. The shape is predictable and permanent. A systematic review of 48 studies and 2,455 patients found a pooled satisfaction rate of 96.7% after implants, with implant removal needed in about 1.3% of cases [6].

Fat transfer uses your own fat, taken by liposuction from the stomach, flanks or thighs, purified and injected into the calf. It gives a softer, more natural feel with no implant and no scar behind the knee. The trade-off is volume and predictability: the same review found satisfaction of 87.2% after fat transfer, and more than half of patients (54.1%) needed a further fat-grafting session to reach the result they wanted [6]. In one series, an average of about 127 ml of fat per calf increased calf circumference by 2.8 cm [9]. It also needs enough spare fat to harvest, which very lean patients may not have.

As a rule of thumb, implants suit people who want a clearly more muscular, defined calf and who have enough soft tissue to cover an implant smoothly. Fat transfer suits people who want a subtle increase, have fat to spare, or want to avoid an implant. The two are sometimes combined, with fat grafted over an implant later to soften its edges. Our guide to calf implants vs fat transfer goes through the comparison in more detail, and our fat transfer calf augmentation guide covers the fat option on its own.

Calf Implants Before and After

More cases, including side and front views and dual-implant results, are on our calf implants before and after page.

Are Calf Implants Safe?

Calf augmentation has a low complication rate compared with most body contouring surgery, but it is not risk-free. A review of 26 studies covering 1,498 patients and 2,629 calves found an overall complication rate of about 4.5%, with subfascial implants at around 5.7%, submuscular implants below 1% and fat grafting about 1.5% [7]. Satisfaction was high across all three techniques.

The complications to know about are:

• Swelling, tightness and seroma (fluid collecting around the implant), the most common early problems.
• Wound healing problems at the incision behind the knee.
• Implant displacement or a visible edge, more likely when the implant is too large for the leg or the soft tissue over it is very thin.
• Capsular contracture, where scar tissue tightens around the implant. It is uncommon in the calf.
• Numbness around the ankle or foot, usually temporary.
• Compartment syndrome, the most serious and rare risk, where pressure rises inside the muscle compartment and threatens its blood supply. It is an emergency. In a long-term series of 50 patients, one professional bodybuilder developed it in one leg despite early removal of the implants [8].

Most of these risks are reduced by the same things: choosing an implant sized to the leg rather than the largest possible, placing it in the subfascial plane, wearing support stockings as instructed, and avoiding calf-loading exercise for six weeks. Our calf implant recovery guide sets out the recovery week by week.

Am I Suitable for Calf Augmentation?

You may be suitable if:

• Your calves are small or out of proportion with the rest of your legs despite consistent training
• One calf is noticeably smaller than the other because of a stable, known cause
• You are 18 or over, in good general health, at a stable weight and a non-smoker or willing to stop
• You have enough soft tissue over the calf to cover an implant smoothly, or enough spare fat for fat transfer
• Your expectations are realistic: surgery adds shape and volume, but it does not change bone structure or ankle width

Surgery is not the right answer if you have not yet trained your calves properly, if a calf is still shrinking or the cause of a difference has not been found, if you have poor circulation or a history of blood clots in the legs, or if what bothers you is excess fat around the calf and ankle rather than too little muscle.

A Surgeon’s Perspective

At Centre for Surgery, all calf augmentation is performed by Mr Metin Nizamoglu FRCS (Plast), a GMC-registered plastic surgeon who subspecialises in body contouring and performs both implant and fat transfer calf augmentation.

At consultation the assessment starts with the questions this article has worked through. How long is the muscle belly, and where does it meet the tendon? How much soft tissue covers the calf, and would an implant edge show through it? Are the two legs the same, and if not, why not? Has training been given a fair chance? For many people with high insertions and well-trained calves, a single implant in each leg adds the inner curve that training cannot. For very lean legs, fat transfer or a smaller implant may be safer. For a leg affected by atrophy, a custom implant designed from a CT scan usually gives a far better match than any standard size. And some people are told honestly that another year of properly structured training is the better first step.

Frequently Asked Questions

Calf Augmentation at Centre for Surgery

If you have given your calves a fair chance with training and they are still out of proportion, or one calf is smaller than the other, a consultation will establish whether an implant, fat transfer or a custom implant is appropriate, and whether surgery would help at all. Calf augmentation is performed by Mr Metin Nizamoglu at our CQC-regulated private hospital at 95–97 Baker Street, Marylebone, rated Good overall, as a day case under TIVA. The £100 consultation fee is redeemable against treatment, and we recommend a two-week cooling-off period after any consent. For all our procedures for men, see our cosmetic surgery for men hub.

Finance is available through Chrysalis Finance, subject to status. See our Finance Options page for details.

Phone: 020 7993 4849 | Email: contact@centreforsurgery.com | Address: 95–97 Baker Street, Marylebone, London W1U 6RN
Contact us to schedule a consultation

References

1. Loos R, Thomis M, Maes HH, et al. Gender-specific regional changes in genetic structure of muscularity in early adolescence. Journal of Applied Physiology 1997;82(6):1802–1810. doi:10.1152/jappl.1997.82.6.1802
2. Johnson MA, Polgar J, Weightman D, Appleton D. Data on the distribution of fibre types in thirty-six human muscles: an autopsy study. Journal of the Neurological Sciences 1973;18(1):111–129. doi:10.1016/0022-510x(73)90023-3
3. Kinoshita M, Maeo S, Kobayashi Y, et al. Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training. Frontiers in Physiology 2023;14:1272106. doi:10.3389/fphys.2023.1272106
4. Kassiano W, Costa BDV, Kunevaliki G, et al. Bigger calves from doing higher resistance training volume? International Journal of Sports Medicine 2024;45(10):739–747. doi:10.1055/a-2316-7885
5. Hubal MJ, Gordish-Dressman H, Thompson PD, et al. Variability in muscle size and strength gain after unilateral resistance training. Medicine and Science in Sports and Exercise 2005;37(6):964–972. PMID 15947721
6. Escandón JM, Sweitzer K, Amalfi AN, et al. Calf augmentation and volumetric restoration: a systematic review and meta-analysis. Journal of Plastic, Reconstructive & Aesthetic Surgery 2022;75(9):3551–3567. doi:10.1016/j.bjps.2022.06.051
7. Melita D, Innocenti A. Surgical calf augmentation techniques: personal experience, literature review and analysis of complications. Aesthetic Plastic Surgery 2019;43(4):973–979. doi:10.1007/s00266-019-01347-z
8. Niechajev I, Krag C. Calf augmentation and restoration: long-term results and the review of the reported complications. Aesthetic Plastic Surgery 2017;41(5):1115–1131. doi:10.1007/s00266-017-0885-0
9. Hoppmann R, Meruane M, González D, et al. Calf lipo-reshaping. Journal of Plastic, Reconstructive & Aesthetic Surgery 2013;66(7):956–961. doi:10.1016/j.bjps.2013.03.017

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• What’s the Difference Between Calf Implants and Fat Transfer?
• Is Calf Augmentation with Fat Worth It?
• Do Calf Implants Need To Be Replaced?
• Calf Implant Recovery and Aftercare
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