Kneeling Cable Concentration Triceps Extension
In SetGrip: Cable Concentration Triceps Extension (Kneeling)
- Secondary muscles
- Forearms
- Body part
- Upper Arms
- Position
- Standing
- Laterality
- Bilateral (both sides together)
- Category
- Strength
Track this exercise in SetGrip — no account needed
Wedging your elbow against the inside of your knee removes every source of cheating: no shoulder drift, no body English, just the forearm hinging against the cable. That makes this the concentration curl of triceps work, a light, single-arm movement for feeling the muscle and evening out a weaker side, not for chasing load.
How to do the Kneeling Cable Concentration Triceps Extension
- Sit on a bench or chair with your knees bent and feet flat on the ground.
- Hold the cable handle with your right hand and place your elbow on the inside of your right knee.
- Extend your arm fully, keeping your elbow stationary and close to your knee.
- Pause for a moment at the top, then slowly lower your arm back to the starting position.
- Repeat for the desired number of repetitions, then switch sides.
Tip: Keep a slight bend at the top on lying extensions to protect the elbow, but lock out fully on cable pushdowns.
Muscles worked
Primary
Triceps · Arms
The triceps straighten the elbow, and overhead variations stretch the long head at the bottom, so you should feel the whole back of the upper arm working with a hard squeeze at lockout.
Secondary
- Forearms — The forearms grip and stabilize the wrist, which should stay straight rather than bending back under the load.
Common mistakes
- Elbows flaring out — on overhead and lying extensions the elbows should stay pointed forward or up, not out to the sides, since flaring turns it into a press.
- Upper arm moving — the upper arm should be pinned in place and only the forearm should move; if the elbow drifts, drop the weight.
- Not finishing the rep — take every rep to a full triceps squeeze; on pushdowns that means a complete lockout for a count.
- Cutting the stretch — on overhead extensions let the weight travel down behind the head until you feel the long head stretch before pressing up.
Where it fits in a workout
Triceps extensions go after the presses in a push session or at the end of an arm day. Superset them with biceps curls.
How many sets, how heavy and how hard: see what the ACSM position stands support.
Variations and alternatives
Similar exercises
When to talk to someone
- Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
- Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
- Pregnant: ask your obstetric care provider which exercise suits you.
Track the Kneeling Cable Concentration Triceps Extension in SetGrip
All 1,100+ exercises with animations are in the app. No account, no sign-up — your history stays on your iPhone and in your private iCloud. Works with Apple Watch.
More exercises
- All arms exercises
- All triceps exercises
- All cable exercises
- Cable triceps exercises
- Banded Single Arm Side Triceps Extension
- Behind Head Close Grip Barbell Lying Triceps Extension
- Barbell Overhead Triceps Extension
- Seated Barbell Overhead Triceps Extension
- Seated Close Grip Barbell Overhead Triceps Extension
- Barbell Skull Crusher
Sources
- ACSM position stand on exercise quantity and quality (Garber et al., 2011)
- ACSM preparticipation health screening (Riebe et al., 2015)
- ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
- CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)
Sources checked on October 17, 2026. Full citations are in the exercise library.
Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.