Shrug (Smith Machine)
The Smith Machine Shrug is an isolation exercise that targets the upper trapezius muscles by elevating the shoulders along a fixed vertical path. This movement builds upper back thickness and neck strength while removing the need to stabilize the bar.
Iridium tracks the accumulated volume on your upper trapezius from compound lifts like deadlifts or rows to determine if you have capacity left within your Maximum Recoverable Volume for direct isolation work. Since the Smith Machine eliminates stability requirements, the algorithm may prioritize this variation over free-weight shrugs when your global fatigue scores are high. Weight progression is calculated using your RPE and recent performance data to ensure overload specifically targets the traps without relying on stabilizer burnout.
Form Cues
- Stand close to the bar so it almost grazes your torso
- Grip the bar slightly wider than shoulder-width
- Drive your shoulders straight up toward your ears
- Pause and squeeze the traps hard at the top
- Lower the weight slowly to a full stretch
- Don't roll your shoulders forward or backward
- Don't use your legs to help momentum the weight up
- Don't jut your head forward as you lift
- Don't bend your elbows to pull the weight
Common Mistakes
- Rolling the shoulders
- Using excessive momentum
- Shortening the range of motion
- Protruding the neck (forward head posture)
- Bending the arms
Muscles Worked
This exercise primarily targets the upper fibers of the trapezius, which are responsible for elevating the scapula. The fixed path of the Smith machine minimizes the need for stabilizer muscles, allowing for maximum isolation of the traps, while the forearms work secondarily to maintain grip strength.
Primary
Secondary
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