Spider Curl
Activation
Muscles worked
Movement
Isolation
Intermediate · Free Weights
Primary muscles
Secondary muscles
Movement pattern
Equipment category
How to perform
- 1
Set up
Lie chest-down on an incline bench, arms hanging straight down holding dumbbells or an EZ-bar.
- 2
Execute the movement
Curl the weight up with the upper arms perpendicular to the floor and fixed; squeeze hard at the top, then lower fully. The hanging position keeps constant tension and kills momentum.
Common mistakes
- Letting the elbows drift
- Not fully lowering
Make it harder
Make it easier
Substitutions
If a machine is busy or unavailable, these train the same pattern a different way.
Your progress over time
What to expect from training this consistently — everyone progresses at their own pace.
- 1
First few sessions
You learn the body positioning (chest on incline, arms perpendicular to floor) and proper tempo, feel the biceps working with reduced momentum, and manage light–moderate loads for clean reps.
- 2
Weeks 2–4
Neuromuscular coordination and mind–muscle connection improve: you can recruit the biceps more fully, increase working sets and reps, and notice a small increase in time under tension and localized muscle fatigue.
- 3
Months 2–3
Consistent progressive overload leads to visible increases in biceps size/shape and higher single-set volumes; you can handle noticeably heavier weights for the same rep ranges while maintaining strict form.
- 4
Months 3–6
Significant hypertrophy and improved peak contraction are evident, forearm and grip strength improve modestly, and the exercise becomes a reliable tool for finishing workouts or addressing lagging biceps.
- 5
6+ months
You have greater overall arm development and an improved ability to vary tempo and intensity techniques (drops, partials, paused reps) to continue progress while minimizing momentum-driven cheating.
Benefits of the spider curl
Directly targets the biceps brachii with minimal involvement from the shoulders, maximizing localized hypertrophy and peak contraction.
The chest-supported, hanging-arm position reduces body swing and momentum, teaching strict elbow isolation and improving exercise discipline.
Maintains near-constant tension on the biceps through the full range, which is effective for time-under-tension hypertrophy protocols.
Secondary activation of the forearms and brachioradialis improves grip strength and forearm muscularity as a useful carryover to other lifts.
Useful as a focused finisher or corrective exercise to bring up lagging biceps without loading the spine or shoulders heavily.
Easy to manipulate with tempo, load, and set structure to target strength–endurance, pure hypertrophy, or peak contraction work.
Exercises that pair with this
Same muscles or the same movement pattern — useful for building the rest of the session.
Spider Curl — questions people ask
What muscles does the spider curl work?
The spider curl trains the biceps as the primary target, with the forearms working as support. It is a isolation pattern, so it also trains the coordination that pattern needs.
How many sets and reps of the spider curl should I do?
Three sets of 8–12 reps with about 90 seconds of rest is a reliable default. Increase the weight once the last rep of every set still looks clean.
Is the spider curl good for beginners?
It is a reasonable second step. The spider curl asks for some control and body awareness. Lighten the weight. If it feels like too much, build the pattern on the supported biceps curl first.
What can I do instead of the spider curl?
Supported Biceps Curl, Cable Curl, Preacher Curl all train the same isolation pattern with different equipment, so any of them works when the machine is busy or your gym does not have it.
What are the most common spider curl mistakes?
Letting the elbows drift; Not fully lowering. Curl the weight up with the upper arms perpendicular to the floor and fixed; squeeze hard at the top, then lower fully. The hanging position keeps constant tension and kills momentum.
Can I do the spider curl at home?
It needs free weights equipment, so it belongs in a gym session rather than a home workout unless you own that equipment.