![]() The primary muscle groups involved during the arm blasters are the biceps brachii long head and short head. To decide which is better for arm growth, it’s important to understand how they function. The Science Behind Arm Blasters and Preacher Curls The preacher curl is a safe and effective way to improve your bicep curl technique by minimizing swaying and secondary muscle involvement so that you cannot “cheat” the movement. The preacher curl is a curl variation that is typically performed using a specific piece of equipment (available at most commercial gyms) which is designed to fix the upper arms in place against a pad to help isolate biceps for bicep curls. This piece of equipment is great for those who have limited equipment to work with, like those who have a home gym, or apartment gym, or are frequently using hotel gyms, but still want to have higher-quality arm workouts. ![]() Anchoring the upper arms in place allows you to target and isolate the biceps when doing biceps curls. The arm blaster is a versatile and portable metal plate that fixes your arms to your sides. If you're in the market for an arm blaster, my top recommendation is the GymReapers Arm Blaster.Preacher curl machines can be found at most commercial gyms, which makes them more widely available than an arm blaster which you would need to purchase.Arm blasters are more versatile than the preacher curl because your movement isn’t as limited and it can be paired with many other pieces of equipment.In this article, I’ll dive into the key differences between the two curl options so that you can determine whether one is better than the other or if you should include both in your program. ![]() The arm blaster is the best option for those who have access to limited equipment, while preacher curls are the better option for commercial gym goers who have access to a preacher curl bench. The arm blaster and preacher curl are two bicep isolation exercises that require specialty equipment. As a bodybuilder, I have tried the arm blaster and preacher curl to grow my biceps, and over the years I’ve noticed that there is some confusion about what the differences between them are and which one is better for bicep growth.
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