Charles Glass Reveals His Ultimate Abs Workout Blueprint for Shredded Results

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With decades of shaping elite physiques, Charles Glass is one of the most respected trainers in bodybuilding. An eye for detail, a keen understanding of biomechanics, and a bespoke approach to each athlete have made him a mentor to many of the sport's top competitors.

The real strength of Glass lies in core development. Bodybuilders, fighters, and even fitness models laud his abdominal workouts as effective. His methods are not tricks or shortcuts - they are science-backed ways of carving out a strong, functional, and attractive core.

Who Is Charles Glass, and Why Does His Training Work​

Charles Glass started competing in bodybuilding contests in the 1980s, winning Mr. Olympia. His physique soon won him fame, as did his analytical mind. In college, he studied engineering and learned about movement. That technical mindset allowed him to dissect each exercise down to form, function, and muscle recruitment.


A nod to his longevity, wisdom, and the sheer number of top-level athletes he has helped succeed, the fitness industry named him "The Godfather." From Mr. Olympia contenders to everyday gym-goers, his clientele grows daily.

Glass bases his training on the mind-muscle connection. He thinks each rep should be targeted and focused on muscle contraction rather than weight movement.

The Core Principles Behind Glass’s Abs Workout​

Charles Glass approaches abs training with the same surgical precision he applies to all muscle groups. He stresses the importance of form and precision over sheer volume. Rather than doing hundreds of mindless crunches, Glass teaches athletes to engage the core through slow, deliberate movements.

He emphasizes the need to target all sections of the abdominal wall. The six-pack (rectus abdominis), the obliques, and the deeper transverse abdominis all play distinct roles. Ignoring any part of the core creates imbalances and weak links, which can limit both performance and aesthetics.


Tempo and tension are key elements in his approach. Glass slows down each rep, increases time under tension, and maintains core engagement throughout the full range of motion. He discourages momentum and swinging, which reduce the effectiveness of the movement. Instead, his routines call for strict control and mindful execution.

Charles Glass’s Ultimate Abs Workout Blueprint​

The following routine represents Charles Glass’s signature approach to developing shredded abs. Each exercise isolates different regions of the core and maximizes muscle fiber recruitment.

Decline Sit-Ups with Twist​

This variation targets both the upper abs and the obliques. The decline angle increases resistance, while the twisting motion activates the sides of the torso. Glass recommends controlling the descent and twisting with purpose at the top of each rep.

Hanging Leg Raises​

To hit the lower abs, Glass turns to hanging leg raises. By starting from a dead hang and slowly increasing the legs with minimal swing, athletes develop raw lower core strength. He advises curling the pelvis upward at the top for full contraction.

Cable Crunches​

This exercise is one of the few weighted core exercises Glass includes. By using a cable machine, the lifter can focus on a forceful contraction under load. The key is to avoid pulling with the arms and instead round the spine to shorten the rectus abdominis.

Seated Russian Twists​

For rotational strength and definition, Russian twists are essential. Glass performs them seated with the feet slightly elevated to keep constant tension on the core. You can use a light medicine ball or plate for resistance, but control remains the priority.

In terms of structure, Glass typically programs three to four sets per movement, aiming for 15 to 20 slow, controlled reps. Rest periods range from 30 to 60 seconds, depending on the athlete’s level. Beginners may start with bodyweight only, while advanced lifters can gradually add resistance and increase difficulty.

Why This Routine Works for All Levels​

One of the standout features of Glass’s core routine is its scalability. Athletes can modify exercises based on the individual’s strength, experience, and access to equipment. For example, they can perform decline sit-ups flat on the ground, and swap cable crunches for resistance band crunches at home.

Whether training in a state-of-the-art gym or a simple home setup, the principles remain the same: deliberate reps, high engagement, and clean form. This adaptability makes the routine accessible to everyone, from beginners to professional athletes.

Tips from Charles Glass on Getting Shredded Abs​

Without the right nutrition, no amount of training will reveal a six-pack, Glass says. Athletes build abs in the gym, but start in the kitchen. The clean diet he advocates is one of lean proteins, healthy fats, and complex carbohydrates. Water and meal timing are also important for achieving low body fat.


His philosophy also stresses consistency. And core training should not be an afterthought in your weekly routine. But Glass warns against overtraining the abs. They need recovery just like other muscle groups.

And he warns against rushing through reps, using momentum, or relying solely on crunches. Balanced and intentional technique is far more effective.

Success Stories: Athletes Trained by Charles Glass​

Over the years, Charles Glass has guided countless athletes to championship physiques. His clients have included IFBB pros, physique competitors, and celebrities preparing for demanding roles. These transformations are often dramatic, showcasing not just aesthetics but improved posture, performance, and overall core strength.

Victor Martinez, Flex Wheeler, Dexter Jackson, and many top names in the industry who credit their abdominal development and conditioning to his system have endorsed his methods. The testimonials highlight not only the physical changes but also the improved discipline and mindset his training instills.

Frequently Asked Questions​

How often should I do Charles Glass’s abs routine?
Two to three times per week is ideal. It allows for proper recovery while still ensuring consistency.

What’s the most common mistake people make in ab workouts?

Rushing through reps or using momentum instead of engaging the core. Each rep should be slow, controlled, and deliberate.

Is cardio necessary to get visible abs?

Yes, cardio helps reduce body fat, which is essential for revealing abdominal muscles. Combine it with a proper diet and strength training for the best results.

 

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