Start Here
Your calves and core work all day, so most people figure they get enough. They don't. Walking around is not training.
Think of your calves and core like the tires and the frame on a truck. Nobody brags about them. But everything else you build rides on them, and you notice fast when they're weak.
Neither needs anything fancy. They need what every muscle needs: real load, a full range of motion and working sets taken hard.
- Calves: train them with your knee straight and with your knee bent, and own the bottom of every rep.
- Core: train it to bend, rotate and brace, and don't skip your lower back.
- Abs You Can See: those come down to low body fat, which is a kitchen job, not a crunch job.
Your First Step: Add two sets of calf raises to your next leg day. Pause for a full second at the bottom of every rep, in the deepest stretch you can control, and take the last set to failure.
The Breakdown
Your Calves Are Two Muscles With Two Jobs
The calf is mostly two muscles. The gastrocnemius is the one you see, the diamond shape on the back of your lower leg. It crosses both the knee and the ankle. Under it sits the soleus, a flatter muscle that only crosses the ankle.
With your knee straight, the gastrocnemius is stretched and ready to work. With your knee bent, it goes slack and the soleus carries more of the load.
One study tested this directly. Fourteen untrained adults trained one leg with standing calf raises and the other with seated calf raises, twice a week for 12 weeks. The standing leg grew its gastrocnemius far more, about 9 to 12% by MRI, while the seated leg's gastrocnemius barely changed. The soleus grew a little in both (Kinoshita et al., 2023).
If you only do one calf exercise, make it a straight-knee one. Seated raises still have a place, just not as your only calf work.
The Bottom of the Rep Is Where the Work Is
Most people train calves with short, bouncy reps in the top half. That's the easy half, and bouncing lets your springy Achilles tendon do the muscle's work.
The research points the other way. When people trained calf raises in only the bottom, stretched half of the range, both heads of the gastrocnemius grew more than when they trained only the top half (Kassiano et al., 2023). In trained lifters, stretched partials and full reps followed by partials both built the calves well (Larsen et al., 2025).
That lines up with two of my Five Essentials: train the entire range of motion (respecting the strength curve), and get a full squeeze.
- Sink all the way down into the deepest stretch you can control.
- Pause at the bottom. Stop, breathe, reset, then drive up with intent. No bounce.
- Squeeze at the top like you're trying to stand on your toenails.
How I Train Calves
When I tore the TFCC in my left wrist deadlifting, I trained calves every day for 18 months.
I mixed the loading. Mid weight for 30 to 50 reps. Heavier weight for 8 to 12 and 12 to 15. On some sets I just let the weight push me down into the deepest stretch, heels driving down, then drove back up onto the balls of my feet. That stretch hurts. It works.
I hit them every way I could: standing, seated, donkey and crouched-down calf raises, plus calf raises on a hack squat or a leg press. On the leg press, set the safeties first. If that sled ever comes down, there is no room under it for your legs.
I also train my tibialis, the muscle on the front of your shin, on a Hammer Strength tib machine I own.
Today I train calves three times a week: both leg days, plus shoulder day, which is my calves, traps and abs day. I have tight ankles, and it keeps me sane. That's my training, not your starting point.
My calves are 21.5 inches. The charley horses and waking up in the middle of the night were worth it. Real pain pays later.
Lock In the Execution First
I don't obsess over foot angle. One study found that turning the toes in or out shifts muscle activity between the inner and outer sides of the calf, but it couldn't say whether that leads to more growth (Riemann et al., 2011). The calf's job is to drive you up through the ball of your foot and big toe. Own that first.
Lock in the execution, then play with the weight and the volume. That means S.S.I. on every rep: set up with the balls of your feet on the edge, stabilize so your knees and hips stay quiet, and initiate from the calf, not by bouncing. Once that's automatic, go for burnouts and drop sets.
Calves for Clients
Calves respond to volume, and it's going to be uncomfortable at every level. Forearms, calves and shoulders are the most common weak links I see. If calves are your weakest muscle group, train them first in the workout, when your energy and focus are highest.
With clients, it's case by case. You have to train calves differently: some respond to volume, some to strength. Some need mid-weight and higher reps, and some need heavy weight and lower reps.
Calves are mostly slow-twitch muscle, so you can train them every day if you want, or two days on and one day off. One day is a lot of volume with moderate reps for strength and hypertrophy; the other day is volume for the pump.
What Your Core Actually Does
Your core is your abs, obliques, the deep layer around your midsection and the muscles along your lower back. It does two jobs:
- Move Your Trunk: bending forward, bending to the side and rotating.
- Stop Your Trunk From Moving: holding your spine steady while your arms and legs push, pull and carry.
The second job shows up on your Meat & Potato Lifts. "Stabilize" in S.S.I. starts with bracing your core before the rep. A brace that leaks means force leaks too. More in Meat & Potato Lifts: Building Around a Few Key Movements.
Training the Core: Four Simple Categories
I don't need anything fancy. I need a few exercises from each category, done hard:
- Bend and Lift: knee-ups, leg raises, hanging and lying flutter kicks, decline crunches.
- Rotate: oblique twists with a weight.
- Lower Back: 45° back extensions and the reverse hyper.
- Brace and Carry: isometric and heavy farmer's walks, heavy trap-bar deadlifts, bracing and any exercise where you force the air out.
I did 45° back extensions pretty much every morning for mobility, left and right, and I finish pretty much every lower-body mobility day with the reverse hyper. I've done very little on the GHD. I still don't trust it to hold me up for a crunch, even though I know it will. GHD crunches are my goal going into 2027.
Take Your Abs to Failure
I take abs to absolute failure. I've had my abs knot up in the middle of a set. I've been yelling at the end of a set with people staring. I don't care who's watching. I don't need a six-pack, but I'm not going to be weak either.
A set you can finish while chatting is not a working set.
Core for Clients
About 90% of my programs include at least one core exercise, usually hanging knee raises or hanging leg raises. They build grip strength too, because you have to hold your own body weight. If grip gives out first, Spud Inc. nylon straps help you hang steady without swinging.
I usually program 4 sets of 12 to 15. If 12 to 15 feels easy, go to failure for 3 or 4 sets. You might find failure is 22 to 24 reps, and those extra reps are where the work is.
Every workout usually has one core exercise, and some have two. It's usually at the end. In a metcon or another type of strength day, a functional core exercise might go in the middle. It depends on the program.
Abs Are Built in the Gym, Shown in the Kitchen
You can have strong abs and never see them. In one study, adults did seven ab exercises five days a week for six weeks. Their ab endurance went up. Their belly fat and waist size did not change compared with a group that did nothing (Vispute et al., 2011).
So train your core for strength and stability, and handle the visible part with your nutrition.
Bro Science Check: "Calves are genetic. Don't bother training them."
What the Research Says: Untrained adults who did standing calf raises twice a week for 12 weeks grew the gastrocnemius by roughly 9 to 12% (Kinoshita et al., 2023). Stretched-position work in particular builds the calf well (Kassiano et al., 2023).
Verdict: Cut. Genetics shape your calves and set how far they can go. Hard, full-range training still moves them. Most "genetic" calves are really untrained calves.
When It Isn't Just Sore
A tight, achy calf after a hard session is normal. Sharp heel pain, a pop or back pain running down a leg is not. Get it checked by a doctor or physical therapist. Not medical advice.
Building the whole leg? Start with Building Your Quads. New to lifting? Read Strength Training 101. Next: Building Your Glutes.
Want calves and core built into a plan instead of tacked on at the end? Apply for coaching at pastrength.com/apply.
Sources
- Kinoshita M, Maeo S, Kobayashi Y, Eihara Y, Ono M, Sato M, Sugiyama T, Kanehisa H, Isaka T. Triceps surae muscle hypertrophy is greater after standing versus seated calf-raise training. Frontiers in Physiology. 2023;14:1272106.
- Kassiano W, et al. Greater Gastrocnemius Muscle Hypertrophy After Partial Range of Motion Training Performed at Long Muscle Lengths. Journal of Strength and Conditioning Research. 2023;37(9):1746-1753.
- Larsen S, Sandberg NØ, Schoenfeld BJ, Fredriksen AB, Kristiansen BS, Wolf M, van den Tillaar R, Swinton PA, Falch HN. Resistance Training Beyond Momentary Failure: The Effects of Past-Failure Partials Versus Initial Partials on Calf Muscle Hypertrophy Among a Resistance-Trained Cohort. European Journal of Sport Science. 2025;25(9).
- Vispute SS, Smith JD, LeCheminant JD, Hurley KS. The effect of abdominal exercise on abdominal fat. Journal of Strength and Conditioning Research. 2011;25(9):2559-2564.
- Riemann BL, Limbaugh GK, Eitner JD, Lefavi RG. Medial and lateral gastrocnemius activation differences during heel-raise exercise with three different foot positions. Journal of Strength and Conditioning Research. 2011;25(3):634-639.