Introduction
In our last session, we focused on vertical pressing with the pike push-up, a movement designed to build strength in your shoulders. All pressing exercises, whether horizontal like a push-up or vertical like a pike push-up, rely heavily on the strength of your triceps. To ensure well-rounded development and to build the raw power needed for more advanced skills, it's beneficial to isolate and strengthen this key muscle group directly.
Today's lesson focuses on the chair-assisted tricep dip. Our goal is for you to learn how to perform this exercise with perfect form, paying close attention to elbow tracking and the depth of the movement. While this exercise is highly effective, it has a reputation for being hard on the shoulders. We will analyze the mechanics of the movement to understand precisely how to execute it safely, turning it into a powerful tool for building your triceps using only a sturdy chair.
Understanding the Target: The Triceps Brachii
Before we dive into the movement, let's briefly look at the primary muscle we're targeting. The triceps brachii, located on the back of your upper arm, is responsible for extending the elbow joint. It's composed of three distinct sections or "heads": the lateral, medial, and long head.
How To Do Bench Dips | ATHLEAN-X
This article from ATHLEAN-X provides a good overview of the anatomy involved.
Please read the section on the muscles worked, focusing on the descriptions under the Triceps heading. You don't need to memorize the specific function of each head, but appreciate that a complete movement will engage the entire muscle group.
When you perform a dip, all three heads of the triceps work together to straighten your arm and lift your body. Proper form ensures that the tension stays on these muscles, rather than shifting to the vulnerable shoulder joint.
The Problem with Dips: Analyzing a Common Mistake
The controversy around bench or chair dips stems from a common and dangerous form mistake: allowing the shoulders to roll forward and collapse. From a mechanical standpoint, this creates an internally rotated shoulder position while the arm is extended behind the body. This combination can dramatically reduce the space within the shoulder joint, leading to the compression and irritation of tendons and other structures—a condition known as shoulder impingement.
The following video does an excellent job of demonstrating this faulty mechanic and explaining why it's so problematic.
Stop Doing Bench Dips Like This!
This video from the ATHLEAN-X channel breaks down the biomechanics of both the wrong and right way to perform a bench dip.
Watch the first part of the video from the introduction of the problem. Pay close attention to the explanation of how a forward-jutting, collapsed shoulder position leads to compression and potential injury.
The Solution: Building a Safe and Effective Dip
To perform the dip safely, you must actively counteract the tendency for the shoulder to roll forward. This involves two key adjustments that reposition the shoulder joint into a stable and strong alignment.
- External Shoulder Rotation: By turning your hands slightly outwards on the chair, you encourage the shoulder to rotate externally, pulling the head of the humerus (your upper arm bone) back into a safer position.
- Scapular Depression and Retraction: Instead of letting your shoulders shrug up towards your ears, actively pull your shoulder blades down and back, as if you were tucking them into your back pockets.
Let's return to the video to see how these two corrections work together.
Stop Doing Bench Dips Like This!
Continuing with the ATHLEAN-X video.
Watch the next two segments which explain the hand position fix and the importance of keeping your shoulders down and back. This demonstrates the correct, stable posture you need to maintain throughout the exercise.
The image below provides a clear static comparison of the incorrect and correct positions. The top figure shows the forward shoulder roll and hips drifting away from the bench, while the bottom figure shows the correct upright posture with the shoulders back and hips close to the bench.
Step-by-Step Execution Guide
Now that you understand the core principles of safety and stability, let's walk through the execution step by step. A sturdy, non-wheeled chair is all you need.
Triceps Bench Dips Exercise: Form Guide for Home Growth & Safety
This article from RITFIT Sports provides a detailed, step-by-step breakdown of the movement, common errors, and the biomechanics of safety.
First, read the full execution guide. Pay special attention to Step 4, which specifies the correct depth. Next, read the sections on Biomechanics and Safety. The key takeaway here is limiting your range of motion to a 90-degree elbow bend for long-term joint health. Finally, review the two common mistakes under the next heading: "The Floating Hips" and "Chicken Winging". These directly address the most frequent form errors.
To summarize the key performance cues:
- Setup: Sit on the edge of a stable chair. Place your hands on the edge next to your hips, with fingers pointing forward or slightly out.
- Starting Position: Slide your hips off the chair, supporting your weight with your arms. Your back should be very close to the edge of the chair.
- Descent: Lower your body by bending your elbows, keeping them pointed straight back, not flaring out to the sides. Your hips should travel straight down.
- Depth: Stop when your elbows form approximately a 90-degree angle. Going deeper places unnecessary stress on the shoulder joint.
- Ascent: Push through the palms of your hands to drive yourself back to the starting position, focusing on squeezing your triceps.
Finding Your Progression
The difficulty of the chair dip is determined by your leg position. To ensure you can maintain perfect form, you should always start with the easiest variation and only progress when you've mastered it.
How To Do A Chair Dip Exercise Properly
This video from BodyFly Fitness clearly demonstrates the different levels of progression for the chair dip, starting from the most basic setup.
First, watch the crucial safety tip regarding your choice of chair from the equipment setup. Next, observe the three progressions: Beginner: Knees bent, feet flat on the floor. Intermediate: Legs straight out in front, heels on the floor. Advanced: Feet elevated on another surface. Start with the knees-bent variation. Your goal is to perform clean, controlled reps with perfect form before moving to a harder version.
Conclusion
Today we've deconstructed the chair dip, transforming it from a potentially risky exercise into a safe and highly effective tricep builder. By understanding the underlying mechanics, you can now confidently incorporate this movement into your routine.
Key Takeaways:
- Chair dips are a primary exercise for isolating and strengthening the triceps.
- The main risk is shoulder impingement, caused by allowing the shoulders to roll forward and collapse.
- Prevent this by keeping your hands shoulder-width apart (or slightly wider with fingers out) and actively pulling your shoulder blades down and back throughout the movement.
- Keep your hips and back as close to the chair as possible.
- Control the descent and stop when your elbows reach a 90-degree angle to protect your shoulder joint.
- Start with the bent-knee variation to master the form before progressing to straight-leg or elevated-feet versions.
In our next training session, we'll give the upper body a rest and focus on building single-leg strength and stability with static split squats. Following that, our next lifestyle lesson will move from prioritizing tasks to understanding the habits that derail them, as we learn how to identify your personal distraction triggers.