Chest Exercise · Barbell
Biomechanical cues verified by the PlanWorkouts Science Review Board under CSCS editorial oversight; see our editorial standards.
The Barbell Guillotine Bench Press is a compound chest movement designed to train the Pectorals with direct engagement of the Triceps.
Transverse plane horizontal adduction of the shoulder combined with elbow extension. Peak mechanical stretch occurs when pectorals are fully lengthened at chest level. Scapular retraction is vital for shoulder joint safety. Executing this with strict form maximizes muscle fiber recruitment while protecting joint structures.
Quick Exercise Facts
Target Muscle Activation
The guillotine bench press lowers the bar to the neck or upper chest rather than the mid-chest, which increases upper chest and front delt involvement but also increases shoulder strain considerably. It's a technique mostly seen in advanced bodybuilding circles and generally not recommended without a spotter and considerable pressing experience. Most lifters get similar upper chest benefit from an incline press with less risk.
How to Do the Barbell Guillotine Bench Press
- Lie on a bench with your feet flat on the floor and your back pressed against it.
- Grip the barbell overhand, hands slightly wider than shoulder-width.
- Slowly lower the barbell toward your neck, letting your elbows point outward.
- Pause briefly once the barbell hovers just above your neck.
- Press the barbell back up to the starting position, fully extending your arms.
- Repeat for your desired repetitions, keeping constant tension on the working muscle throughout.
Recommended Sets & Reps by Training Goal
70–80% 1RM · 90–120s rest
85%+ 1RM · 2–3 min rest (Calc 1RM)
50–60% 1RM · 45–60s rest
Biomechanical & Joint Load Cues
Transverse plane horizontal adduction of the shoulder combined with elbow extension. Peak mechanical stretch occurs when pectorals are fully lengthened at chest level. Scapular retraction is vital for shoulder joint safety.
Common Mechanical Mistakes & Form Errors to Avoid
- Excessive Elbow Flare (90°): Flaring the upper arms directly perpendicular to the torso pinches the supraspinatus tendon against the acromion. Tuck elbows to roughly 45–70 degrees.
- Loss of Scapular Retraction: Allowing shoulder blades to slide forward off the bench shifts mechanical tension off the pectorals onto the delicate anterior deltoids.
- Bouncing Off the Sternum: Using ribcage recoil to bounce the load bypasses the critical bottom turnaround stretch where muscle protein signaling is highest.
Proper Breathing Patterns & Core Engagement
Inhale deeply during the lowering (eccentric) phase while pinning shoulders back. Exhale forcefully through the concentric pressing phase past the friction zone.
Add the Barbell Guillotine Bench Press to Your Custom Workout Routine
Build a personalized, science-backed workout plan matching your training goals, equipment access, and schedule.
Injury Modification & Joint Safety
Lifters with anterior shoulder impingement or AC joint inflammation should restrict elbow flare to 45–60 degrees or substitute with neutral-grip dumbbell presses. If joint irritation persists, immediately stop and substitute this movement with another exercise from the Chest exercises category.
Muscles Worked
The Barbell Guillotine Bench Press primarily targets the Pectorals, with Shoulders as the primary synergist muscle group, along with the Triceps.
More Chest Exercises
Archer Push Up
Assisted Chest Dip (kneeling)
Assisted Seated Pectoralis Major Stretch With Stability Ball
Assisted Wide-Grip Chest Dip (kneeling)
Band Bench Press
Band One Arm Twisting Chest Press
More Pectorals Exercises
Barbell Bench Press
Barbell Decline Bench Press
Barbell Decline Pullover
Barbell Decline Wide-Grip Press
Barbell Front Raise And Pullover
Barbell Incline Bench Press
Equipment Alternatives
Don't have barbell? These target the same pectorals with different equipment.
Chest And Front Of Shoulder Stretch
Behind Head Chest Stretch
Cable Bench Press
Chest Stretch With Exercise Ball
FAQ
- What muscles does the Barbell Guillotine Bench Press work?
- The Barbell Guillotine Bench Press primarily targets the pectorals as the primary agonist. Synergist assistance is provided by the shoulders along with the triceps. Maintaining strict biomechanical alignment ensures maximal tension remains focused on the intended muscle fibers rather than shifting to surrounding stabilizer joints.
- What equipment do I need for the Barbell Guillotine Bench Press?
- The Barbell Guillotine Bench Press is performed using a barbell. Ensure all equipment is securely positioned with collars or safety pins locked before loading working sets. If you train in a home gym or minimal setup, explore our equipment-free and resistance band alternatives below.
- What is the most common form mistake on the Barbell Guillotine Bench Press?
- The most frequent error is excessive elbow flare (90°): Flaring the upper arms directly perpendicular to the torso pinches the supraspinatus tendon against the acromion. Tuck elbows to roughly 45–70 degrees.. Controlling the 2 to 3-second eccentric lowering phase ensures maximal hypertrophic stimulus while shielding connective tissue.
- How many sets and reps should I perform on the Barbell Guillotine Bench Press?
- For muscle hypertrophy and size, aim for 3 to 4 working sets of 8 to 12 repetitions at 70% to 80% of your 1RM with 90 to 120 seconds rest. For absolute strength development, prioritize 4 to 5 sets of 3 to 6 heavier reps with 2 to 3 minutes rest.
- What's a good alternative to the Barbell Guillotine Bench Press?
- If you don't have access to a barbell, the Chest And Front Of Shoulder Stretch targets the same pectorals using body weight instead. This alternative replicates the same joint angle and movement plane while allowing you to train effectively with different available gear. You can also substitute it seamlessly in our free Workout Plan Builder.