The best magazine
The guillotine press is performed by those who believe the form of the exercise stimulates the chest to a greater degree than other pressing variations, or specifically targets the upper region of the chest (this has been supported by Milos Sarcev, a world famous professional bodybuilding trainer).
We would expect the guillotine bp to target the same muscles as those recruited by the common bp exercise, specifically the chest, triceps and shoulders.
The triceps involvement during the guillotine press would be argued to be less than when performing the normal benchpress due to the upper arms being perpendicular to the body.
When targeting the chest, a grip which is shoulder width, or greater, would be recommended.
The guillotine benchpress would be ideally performed with a training partner due to safety reasons.
The exercise may not be suitable for those with injurious shoulders, and those who are relatively new to training.
Form is vital to ensure maximum effectiveness and safety, and the barbell should therefore remain in full control of the trainer, with a slow and controlled movement.
The guillotine variation of the benchpress can only really be performed with a barbell, and therefore may not be a suitable choice for those with notable muscle imbalance.
The bench-press performed with a set of dumbbells, with strict form, would be a more suitable exercise to perform for those with muscle imbalances due to the unilateral nature of dumbbell training.
The guillotine laying-press would likely be implemented into a bodybuilding style training routine to stress the chest fibres.
Those who train for strength will not gain much benefit from performing the guillotine bp, with the form limiting the resistance which can be used.
Bodybuilders may wish to integrate the exercise into a chest routine, performing between eight and twelve repetitions per set, with a management weight, and strict form.
Source: ...