Mastering the JM Press: A Guide to Enhanced Tricep Development

Jul 17, 2025

Understanding the JM Press

The JM Press is a unique and effective exercise that targets the triceps, offering a combination of both a close-grip bench press and a skull crusher. This hybrid movement is named after powerlifter John Mark Blakley, who popularized it as a reliable method for building tricep strength and definition. For those looking to enhance their upper body workout routine, mastering the JM Press can be a game-changer.

A sporty Asian woman is sitting on a bench press and performing a dumbbell overhead tricep extension

Benefits of the JM Press

The JM Press offers several distinct advantages over other tricep exercises. Firstly, it allows for greater muscle activation, engaging both the long and lateral heads of the triceps. This increased engagement aids in developing a fuller and more defined tricep muscle. Additionally, the JM Press provides a unique angle of resistance, which can help to break through plateaus by challenging your muscles in new ways.

Moreover, the JM Press is versatile and can be easily incorporated into your existing routine. Whether you're a seasoned powerlifter or a fitness enthusiast looking to add variety to your workouts, this exercise can be tailored to fit various training goals.

How to Perform the JM Press

To perform the JM Press correctly, follow these steps:

  1. Lie on a flat bench or smith machine with a barbell in your hands, using a grip slightly narrower than shoulder-width.
  2. Start with the barbell at arm's length above your chest.
  3. Lower the bar towards your chin or upper chest by bending your elbows.
  4. Pause briefly when the bar is close to your chest, then press back up to the starting position.
bench press

Common Mistakes to Avoid

While the JM Press is highly effective, it is crucial to avoid common mistakes that can lead to injury or reduced effectiveness. One of the most frequent errors is using too much weight. Since this exercise involves both pressing and extension movements, it's important to start with lighter weights and focus on proper form.

Another mistake is flaring out the elbows excessively, which can place undue stress on the shoulder joints. Maintain a controlled movement and keep your elbows tucked in to maximize tricep engagement and minimize joint strain.

Incorporating the JM Press into Your Routine

The JM Press can be incorporated into your workout regimen in various ways. It can serve as a primary tricep exercise on arm-focused days or act as an accessory movement after heavy pressing exercises like bench presses. Consider performing  1-2 sets until failure or 0-2 RIR(reps in reserve) to effectively stimulate muscle growth.

workout routine


Conclusion

The JM Press is a powerful tool for anyone looking to enhance their tricep development. By understanding its benefits, mastering the technique, and avoiding common pitfalls, you can make this exercise a valuable part of your fitness journey. Embrace the challenge, stay committed, and watch as your strength and muscle definition improve over time.