Box Single Leg Assisted Pull-Up
Box Single Leg Assisted Pull-Up Exercise Description
The Box Single Leg Assisted Pull-up is a vertical pulling variation that uses a stable box to provide adjustable assistance via one foot. It reinforces strict pull-up mechanics—active scapular control, full range of motion, and smooth tempo—while letting you scale difficulty by modulating leg drive. Primary movers include the latissimus dorsi, with assistance from the biceps brachii, brachialis, posterior deltoid, middle and lower trapezius, rhomboids, and the forearm flexors for grip. Maintaining a braced trunk and neutral spine helps align the ribcage and pelvis so the elbows can drive down efficiently and the shoulder blades depress and retract. This drill is commonly used as a progression toward unassisted pull-ups and for practicing consistent reps without momentum. The single-foot setup also encourages even pulling mechanics and minimizes excessive lower-body contribution compared with two-foot assistance.
- Muscle Groups: Lats
- Target Muscles: Latissimus Dorsi
- Assisting Muscles: Biceps Brachii - Long Head, Brachialis, Deltoid - Posterior, Rhomboid Major, Trapezius - Lower Fibers, Trapezius - Middle Fibers
- Stabilizing Muscles: Flexor Carpi Ulnaris, Flexor Digitorum Superficialis, Multifidus, Rectus Abdominis, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Back, Mid Back
- Body Surface: Back
- Body Symmetry: Bilateral
- Equipment: Bodyweight
- Exercise Patterns: Pull
- Exercise Type: Strength
- Functional Grouping: Shoulder Extensors
- Joint Involvement: Multi-joint
- Muscle Location: Lats
- Movement Direction: Vertical
- Muscle Position: Posterior
- Gender: Female
How To Do The Box Single Leg Assisted Pull-Up Exercise
‘- Set a sturdy box under the pull-up bar slightly in front of you.
– Grip the bar with a pronated grip about shoulder-width; wrap the thumb.
– Place one foot centered on the box; keep the other leg hovering straight or lightly behind.
– Brace the core; ribs stacked over pelvis; glutes lightly engaged; neck neutral.
– Start from a dead hang, then create an active hang by depressing and slightly retracting the scapulae.
– Pull by driving the elbows down toward the ribs while keeping the shoulders “down and back.”
– Press gently through the foot on the box—use only the assistance needed; avoid jumping or kipping.
– Keep the body still; avoid swinging; lead the chest slightly toward the bar.
– Continue until the chin clears the bar without craning the neck.
– Pause briefly, then lower under control to full elbow extension, maintaining shoulder depression as long as possible.
– Reset your position and tension before the next repetition; step down carefully when finished.
Box Single Leg Assisted Pull-Up Tips
‘- Position the box slightly in front of you so your working leg can press down comfortably.
– Grip the bar with a shoulder-width pronated grip and wrap your thumb around for a secure hold.
– Place only one foot centered on the box and keep the other leg hovering straight or lightly behind to limit lower-body contribution.
– Brace your core with ribs stacked over pelvis, glutes lightly engaged, and neck neutral to maintain a stable, neutral spine.
– Start each rep from a dead hang, then create an active hang by depressing and slightly retracting your shoulder blades.
– Pull by driving your elbows down toward your ribs while keeping your shoulders “down and back” and leading the chest slightly toward the bar.
– Press gently through the foot on the box, using only as much assistance as needed and avoiding any jumping or kipping.
– Keep your body still and avoid swinging so you can reinforce smooth tempo and strict pulling mechanics.
– Raise until your chin clears the bar without craning your neck, then pause briefly before lowering.
– Lower under control to full elbow extension, maintaining shoulder depression as long as possible, then reset your tension before the next rep and step down carefully when finished.
Box Single Leg Assisted Pull-Up Beginner Introduction
The Box Single Leg Assisted Pull-up is a supported pull-up drill that blends bodyweight strength with precise control. A pull-up bar is used along with a sturdy box placed under one foot, letting the leg share some of the workload without taking over. This arrangement allows the upper body to practice a true vertical pull while the assistance level is easily adjusted simply by how much the working leg contributes through the box.
This exercise centers on the back muscles, especially the lats, with strong involvement from the biceps, shoulders, upper back, and forearms for grip. The movement emphasizes organized body alignment, with the midsection held firm so the torso stays steady and the ribs and hips stay well stacked. Each repetition highlights smooth motion from a hanging position up to chin-over-bar and back down, without swinging or using momentum. Because only one foot is supported, both arms are encouraged to share the work more evenly, making this drill a popular bridge between banded or heavily assisted work and strict, unassisted pull-ups.