Barbell Close-grip Bench Press vs Barbell JM Bench Press

Compare target muscles, equipment, difficulty, movement type, and secondary muscles for Barbell Close-grip Bench Press and Barbell JM Bench Press.

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Barbell Close-grip Bench Press vs Barbell Jm Bench Press — both are compound, barbell-based triceps builders, but they load the elbow and shoulder differently. If you want clear guidance on which to use, you’re in the right place. I’ll cover biomechanics, muscle activation, setup and technique cues, rep and load ranges, injury risk, and programming recommendations so you can pick the right movement for triceps muscle growth, strength, or rehabilitation.

Exercise A

Barbell Close-grip Bench Press

Target Triceps

Equipment Barbell

Body Part Upper-arms

Difficulty Intermediate

Movement Compound

Secondary Muscles

Chest Shoulders

Exercise B

Barbell JM Bench Press

Target Triceps

Equipment Barbell

Body Part Upper-arms

Difficulty Intermediate

Movement Compound

Secondary Muscles

Chest Shoulders

Muscles used

Listed target and secondary muscles, shown on the body. Locations, not activation or strength scores.

Target
Secondary
Not highlighted

Barbell Close-grip Bench Press

Front

Back

Target: Triceps
Secondary: Chest, Shoulders

Not shown on diagram: Shoulders. These labels do not identify a precise region on this map.

Barbell JM Bench Press

Front

Back

Target: Triceps
Secondary: Chest, Shoulders

Not shown on diagram: Shoulders. These labels do not identify a precise region on this map.

Grey does not mean a muscle is unused. The diagrams show only the mapped catalogue labels.

Attribute	Barbell Close-grip Bench Press	Barbell JM Bench Press
Target Muscle	Triceps	Triceps
Body Part	Upper-arms	Upper-arms
Equipment	Barbell	Barbell
Difficulty	Intermediate	Intermediate
Movement Type	Compound	Compound
Secondary Muscles	Chest, Shoulders	Chest, Shoulders

Visual Comparison

An illustrative 1–10 profile derived from catalog difficulty, equipment, and listed-muscle fields—not measured performance or muscle activation.

Key Differences

Both exercises target the Triceps using Barbell. The catalogue does not establish which exercise is better for an individual goal.

Muscle comparison

Shared target muscles

Both exercises primarily target the triceps brachii by producing elbow extension torque. The close-grip bench press drives vertical force with a tucked elbow (~45°) that recruits triceps across the whole ROM while still loading the pectoralis major and anterior deltoid. The JM press is more of a hybrid elbow-dominant pattern: it emphasizes terminal elbow extension and increases triceps moment arm near lockout. Expect similar peak triceps activation, with the JM press often producing slightly higher activation at the terminal range (approx. 5–15% more at lockout in practical settings).

Secondary muscle differences

Close-grip bench uses greater horizontal adduction and shoulder flexion, so the chest and anterior deltoid contribute more (roughly 15–30% of load distribution shifts to pecs vs a standard close-grip). The JM press reduces chest involvement and increases elbow shear and triceps-only loading, lowering pec contribution by an estimated 10–20%. Shoulders in the JM press experience less horizontal adduction but more anterior shear at the glenohumeral joint during the arc.

Muscle involvement analysis

Close-grip bench follows a straighter bar path with simultaneous shoulder horizontal adduction and elbow extension; triceps work is distributed through the range with strong mid-range activation. JM press uses an arcing bar path that increases elbow flexion/extension demand and shifts peak activation toward lockout, altering length-tension relationships by placing the long head at a slightly longer or more under-tension position during extension.

Equipment and setup

Barbell Close-grip Bench Press: setup

Barbell Close-grip Bench Press requires a barbell, a flat bench, and a rack or spotter. Grip is roughly shoulder-width (about 20–24 cm or 8–10 inches from center knurling to knurling).

Barbell JM Bench Press: setup

Barbell Jm Bench Press needs the same kit: barbell, bench, and rack/spotter. You also need room to control an arcing bar path and greater elbow stability, so a sturdy bench and good wrist sleeves/technique matter more.

Access and practicality

Barbell Close-grip Bench Press — it’s simpler to set up, safer to load heavy, and easier to teach. The JM press demands finer motor control and is less forgiving without spotter support.

Learning and progression

Learning the movements

Close-grip bench has a gentler learning curve: a more vertical bar path and obvious stopping point on the chest make it easier for beginners to master. The JM press requires precise bar arc and elbow positioning, so the learning curve is steeper.

Progression considerations

Close-grip bench offers broader progression (3–6 reps for strength, 6–12 for hypertrophy) and heavier loading due to safer shoulder/elbow mechanics. JM press is ideal as an accessory for hypertrophy and lockout strength (6–12+ reps) but should be progressed with smaller load jumps and a focus on tempo.

Limitations and precautions

JM press carries higher elbow and distal humerus shear risk if performed too heavy or with poor technique. Close-grip bench has lower relative injury risk but can stress wrists and elbows if grip and wrist position are poor.

Pros & Cons

Barbell Close-grip Bench Press

+ Pros

Strong overall triceps activation while still recruiting chest and shoulders for heavier loads
Easier to load progressively for strength (safely handle 85–95% of your bench-derived 1RM for low reps)
Simpler bar path and setup—good for beginners and heavy work sets
Lower shear stress at the elbow compared with JM press

− Cons

Still recruits the chest and shoulders — less isolated triceps stimulus than the JM press
Can aggravate wrists if grip is too narrow or thumbs aren’t wrapped
Potential for shoulder discomfort if elbows flare excessively

Barbell JM Bench Press

+ Pros

More focused triceps loading at terminal extension, useful for building lockout strength
Reduces chest contribution, increasing triceps-specific stimulus for hypertrophy
Shorter ROM at the shoulder may help trainees with pec/shoulder pain
Useful as an accessory to fix weak triceps-driven portions of a lift

− Cons

Higher shear forces at the elbow — greater injury risk under heavy loads
Steeper technical demand; bar arc and elbow path must be controlled
Harder to safely test 1RM — best used with submaximal loads and higher reps

When Each Exercise Wins

For muscle hypertrophy: Barbell Jm Bench Press

JM press concentrates load on the triceps, especially at lockout, improving time under tension for elbow extensors. Use 6–12 reps with controlled eccentric tempo to exploit the triceps’ length-tension curve.

For strength gains: Barbell Close-grip Bench Press

Close-grip bench lets you safely move heavier loads and train lower rep ranges (3–6) to increase maximal strength while still involving stabilizing chest and shoulder muscles.

For beginners: Barbell Close-grip Bench Press

Simpler setup and straighter bar path make it easier to teach proper elbow tuck and bar control. It builds baseline pressing strength with lower technical risk.

For home workouts: Barbell Close-grip Bench Press

Requires the same basic equipment but is safer to load and spot alone; the straight bar path and heavier loading options give better return on limited equipment.

Frequently Asked Questions

Can I do both Barbell Close-grip Bench Press and Barbell Jm Bench Press in the same workout?

Yes — pair them intelligently: use close-grip bench as the heavy main lift (3–6 reps) and JM press later as an accessory for 6–12 reps. Keep JM loads lighter and watch elbow pain; prioritize technique over load.

Which exercise is better for beginners?

Barbell Close-grip Bench Press is better for beginners because its straighter bar path and simpler setup reduce technical errors. It builds pressing strength while still training triceps, chest, and shoulders simultaneously.

How do the muscle activation patterns differ?

Close-grip bench produces distributed triceps activation through the range plus substantial pectoral and anterior deltoid activity due to horizontal adduction. JM press shifts peak activation toward terminal elbow extension, increasing triceps-specific loading and changing the length-tension relationship at the long head.

Can Barbell Jm Bench Press replace Barbell Close-grip Bench Press?

Replace only if your goal is focused triceps development or lockout work; it should not fully replace close-grip bench for maximal strength because it’s harder to safely load and poses more elbow stress. Use it as a supplemental exercise in most programs.

Comparison Summary

Use the Barbell Close-grip Bench Press as your primary triceps compound when you want to move heavy, build pressing strength, or keep technique simple. Program it in low- to moderate-rep blocks (3–6 for strength, 6–10 for hypertrophy) with attention to elbow tuck and wrist alignment. Choose the Barbell JM Bench Press as a targeted accessory when your goal is triceps hypertrophy or improving lockout. Keep loads conservative (50–75% of close-grip 1RM), use 6–12+ rep ranges, and practice the arcing bar path to limit elbow shear. Alternate them across training cycles for balanced muscle development and reduced overuse risk.

Exercise instructions

Steps from the exercise catalogue. Read the full sequence before starting.

Barbell Close-grip Bench Press

Lie flat on a bench with your feet flat on the ground and your back pressed against the bench.
Grasp the barbell with a close grip, slightly narrower than shoulder-width apart.
Unrack the barbell and lower it slowly towards your chest, keeping your elbows close to your body.

Read remaining steps for Barbell Close-grip Bench Press

Pause for a moment when the barbell touches your chest.
Push the barbell back up to the starting position, fully extending your arms.
Repeat for the desired number of repetitions.

Barbell JM Bench Press

Lie flat on a bench with your feet flat on the ground and your back pressed against the bench.
Grasp the barbell with an overhand grip, slightly wider than shoulder-width apart.
Lower the barbell to your chest, keeping your elbows tucked in close to your body.

Read remaining steps for Barbell JM Bench Press