Forearm Training: What Actually Works, With Real Numbers

Your forearms work on nearly every upper-body lift, and almost nobody trains them on purpose. The result is predictable: your grip quits before your back does on deadlifts, and before your biceps do on chin-ups. Here's what to actually do, with numbers, and how to avoid an angry elbow.

What you're actually training

The forearm holds around twenty muscles, but for programming purposes three groups are enough. The flexors sit on the palm side, bend the wrist and fingers, and are what hold the bar. The extensors sit on top, straighten the wrist and fingers, and are almost universally ignored. The brachioradialis runs from the forearm across the elbow and shows up as the ridge you see when you curl with a reverse grip.

This musculature is built for frequent, sustained work, so it tolerates more sets and higher frequency than, say, your hamstrings. As a general rule, 10–16 working sets per week is the realistic zone for visible progress.

Three kinds of grip

• Crush grip — closing the hand against resistance, like a hand gripper or a handshake.
• Support grip — holding a load for time without letting go: farmer's walks, bar hangs, heavy rows. This is the one you're missing on deadlifts.
• Pinch grip — thumb against the fingers, such as holding two plates smooth-side out.

Progress in one type does not transfer automatically to the others. If your grip dies in the third set of rows, train support holds, not a gripper.

Exercises and numbers

Support and crush

• Bar hang: 3 sets of 30–45 seconds, 90 seconds rest. Once you clear 60 seconds comfortably, add 5–10 kg on a belt.
• Farmer's walk: 3–4 sets of 30–40 metres. A realistic start is 40–50% of bodyweight per hand (so 32–40 kg per hand for an 80 kg lifter).
• Rack bar hold: 3 sets of 15–20 seconds at 100–110% of your working deadlift weight.
• Gripper or tennis ball squeeze: 3 sets of 8–12 reps with a 2-second hold at full closure.

Flexion, extension, rotation

• Palms-up wrist curl (forearms braced on a bench): 3 sets of 15–20 reps, 15–25 kg to start, with a full 2-second lowering phase.
• Palms-down wrist curl: 3 sets of 15–20, but at 40–50% of the weight you used palms-up. That's normal — the extensors are much weaker.
• Reverse curl: 3 sets of 10–12, the single best movement for the brachioradialis.
• Supination–pronation with a hammer or stick: 2 sets of 10 each direction; 2–5 kg is plenty.
• Banded finger extension: 2–3 sets of 20–25 reps. It takes a minute and does more for elbow balance than anything else on this list.

Fitting it into the week

You don't need a dedicated forearm day. Two setups that work:

1. Tacked onto existing sessions: two forearm exercises at the end of your back day and two at the end of your arm day, 3 sets each. That's about 12 sets a week and 8–10 extra minutes per session.
2. Short standalone block: 10 minutes, three times a week — one support hold, one flexion movement, one extension movement. Ideal if you train at home.

Leave at least 24 hours between two serious forearm sessions, and never put heavy grip work immediately before deadlifts or pull-ups — you'll burn the grip before the main lift.

Progression

Forearms improve slowly and in small increments. Adding 20 kg a month isn't realistic; adding 1–2 kg every second week is. Track one number: hang time in seconds, or farmer's walk load. If in 6–8 weeks your hang hasn't improved by at least 10 seconds, the problem is either volume (too few sets) or that you take every set to total failure and never recover.

Common mistakes

• Flexors only. A 2:1 ratio in favour of flexors is already enough imbalance; extensors belong in every block.
• Straps for everything. Straps are a tool for heavy top sets, not for warm-ups and back-off sets. Use them from set one and your grip never gets a stimulus.
• Sets that are too short. Forearms respond to time under tension — a jerky set of 6 does essentially nothing.
• Training through sharp pain. A burn in the muscle is fine; a stabbing elbow or tingling fingers is not.

Elbow pain and when to see a doctor

The two most common complaints are pain on the outside of the elbow (tennis elbow, usually extensor overload) and on the inside (golfer's elbow, the flexors). First move is to cut the load by 30–50% and switch to slow, controlled reps — 3 sets of 15 with a 3–4 second lowering phase, every other day. Most people improve over 6–12 weeks as long as they don't stop loading the tissue entirely.

See a doctor if: tingling or numbness in the fingers lasts more than a few days, pain wakes you at night, you're dropping objects or noticing genuine grip weakness, pain persists beyond 6 weeks despite reduced load, there's visible swelling, redness or heat, or you felt a pop followed by sudden loss of function. Tingling specifically in the thumb, index and middle finger is worth checking promptly — that's a nerve compression pattern, not ordinary tendon irritation.

The short version

• Train all three patterns — support, crush and pinch. They don't carry over to each other.
• 10–16 working sets per week, spread over 2–3 days, 8–10 minutes at a time.
• Keep flexor-to-extensor work at 2:1 at most; banded finger extension in every block.
• Track hang seconds or farmer's walk load, and add 1–2 kg every second week.
• Finger tingling, night pain or grip weakness means see a doctor, not push through it.