Bench press grip width: wide or close

Hands out for the chest, hands in for the triceps: the measurements do not support the split.

The question is almost always framed as a choice of muscle. Wide for the pecs, close for the arms. That reasoning sets grip width in most gyms.

The three studies that measured it say something else. Grip width moves the load you lift and the angle of your shoulder. On which muscles do the work, it moves far less than its reputation.

Grip width is a measurement, not a feeling

The research does not talk about "wide" and "close". It talks about biacromial width: the distance between your two acromions, the bone you can feel at the top of each shoulder. Every grip width is expressed as a multiple of that distance, because the same bar produces a different shoulder angle on two different frames.

Green and Comfort (2007) give the thresholds. Below 1.5 times biacromial width, shoulder abduction stays under 45°. At 2 times that width and beyond, it passes 75°. And a grip wider than 1.5 times biacromial width multiplies the torque at the shoulder by 1.5 compared with a close grip.

Measure yours once. For a biacromial width of 42 cm, the mean of Saeterbakken et al.'s (2017) athletes, the 1.5 threshold falls at 63 cm between the hands.

What grip width changes: the load

Saeterbakken et al. (2017) put 12 national- and international-level bench press athletes through a 6RM at three grips: close (their own biacromial width, 42.0 ± 3.5 cm), medium (61.5 ± 3.5 cm) and wide (81 cm, the maximum allowed in competition).

The loads came out stepped. 132.7 kg wide, 125.4 kg medium, 119.2 kg close. That is 5.8% more wide than medium, and 11.1% more wide than close (p ≤ 0.001).

The explanation is mechanical and has nothing to do with muscle: the further apart the hands, the shorter the distance the bar travels between the chest and lockout.

What it barely changes: the muscles recruited

This is the result that contradicts the opening reasoning. Saeterbakken et al. recorded EMG from the pectoralis major, anterior and posterior deltoid, biceps brachii, triceps brachii and latissimus dorsi across the three grips. One muscle showed a significant difference between widths: the biceps brachii, whose activation was 30.5% and 25.9% lower in the close grip than in the medium and wide grips (p = 0.003 to 0.040).

Not the pec. Not the triceps. Green and Comfort reach the same conclusion on the pec while reviewing earlier work: varying the grip from 100% to 190% of biacromial width does not significantly affect recruitment of the pectoralis major or the anterior deltoid (p > 0.05).

The literature is not unanimous, and the gap is methodological. Lehman (2005) measured 12 men holding five bench press variations isometrically: narrowing the grip raises triceps activity and lowers activity in the sternocostal portion of the pectoralis major. An isometric hold compares grips at equal load. Saeterbakken compares them at equal effort, each grip carrying its own 6RM, which is the situation of a real set.

The real ceiling is the shoulder, not the pec

Green and Comfort list three injuries associated with wide-grip benching: anterior shoulder instability, atraumatic osteolysis of the distal clavicle, and rupture of the pectoralis major. The shared mechanism is abduction approaching 90° combined with external rotation, the position the bar forces when the hands move out.

Their recommendation carries a number: a grip at or below 1.5 times biacromial width, which keeps abduction within 45°. For the recreational lifter they add that the descent can stop 4 to 6 cm above the chest. That last instruction does not apply to a competitor, who has to touch the chest for the attempt to count.

The point worth keeping is the one they make themselves: reducing grip width does not markedly reduce either the force produced or the contribution of the pectorals. The trade-off many lifters think they are making is not there.

The three bench presses in the Overload reference library

The Overload exercise library holds 897 movements. Three of them are the same barbell flat bench press and differ only in how far apart the hands go. Here is what members actually logged.

Variant	Primary muscle in the library	Member uses	Share
Barbell Bench Press - Medium Grip	Chest	1,153	86.5%
Close-Grip Barbell Bench Press	Triceps	179	13.4%
Wide-Grip Barbell Bench Press	Chest	1	0.1%

One use. Out of 1,333 logged sets of barbell bench press, the wide grip accounts for exactly one.

That is the reverse of what the maximum load would suggest. The grip that let Saeterbakken's competitors lift the most is the one nobody logs. The medium grip, which has no name anywhere in the literature, absorbs almost everything.

Two notes on method. The count keys off the exercise name, so a member who takes a wide grip on the "medium grip" variant is counted in the first row. And the library itself takes a side on the muscle question: it files the close grip as a triceps exercise and the other two as chest exercises, which follows Lehman rather than Saeterbakken.

What the imbalance means

The wide grip is not a hypertrophy choice, it is a competition choice. It exists because the rules allow 81 cm and because shortening the bar path moves more kilos. Off a platform, it buys a few percent of load against shoulder abduction beyond 75° and joint torque multiplied by 1.5.

So the medium grip dominating to this degree is not a collective mistake. It is the answer the data supports, arrived at through practice before it arrived through measurement.

Practical recommendations

• Measure your biacromial width once and set your working grip below 1.5 times that value. For 42 cm shoulders, that is 63 cm between the hands.
• Do not change grip expecting to move the work toward the pecs or toward the triceps. The only muscle that shifts significantly between widths, in Saeterbakken et al., is the biceps.
• If you are preparing a powerlifting meet, the wide grip is justified, and the 11.1% of extra load is measured on athletes who train it year-round. Train it as a movement in its own right.
• To develop the long head of the triceps, grip width on the bench press is not the lever. Arm position is, as covered in the guide on triceps extensions.
• The machine or cable bench press does not reproduce this trade-off, because the path is guided and the resistance profile is different: the guide on cables versus free weights covers what the cable changes.
• Test a width for several weeks before concluding anything. Changing grip moves the number on the bar from the first session, which is not information about your progress.

Conclusion

Grip width settles two real things, the load and the angle of your shoulder, and one imaginary one, the split between pecs and triceps. The 1,333 sets Overload members logged already lean 86.5% toward the medium grip. Measure your acromions, stay under 1.5 times that width, and stop looking for a muscle in a hand spacing.

This article presents the current scientific data. For a personalised programme, consult a health professional.