How To Do Assisted 90 Degree Chin Ups
Assisted 90 Degree Chin Ups are a strength hold and partial pulling exercise that targets the biceps, lats, upper back, and core. This variation reduces bodyweight using bands, a box, or light foot support, making it easier to maintain the 90 degree elbow position. Proper form is important to build pulling strength, protect the elbows, and prepare for full 90 degree chin up holds and reps.
Step-by-Step Guide to Properly Execute Assisted 90 Degree Chin Ups
Starting Position
Set up a pull-up bar with assistance from a resistance band, box, or your feet lightly on the ground. Grab the bar with a chin-up grip, palms facing you, hands shoulder-width apart. Pull yourself up until your elbows are bent at roughly 90 degrees. Your chin should be close to bar height, chest lifted, shoulders pulled down and back, and core tight.
Pulling Phase
From a dead hang or slight bend in the arms, use your back and biceps to pull yourself up into the 90 degree position. Use the assistance only as much as needed to reach the position while keeping tension through your upper body. Avoid swinging or kicking.
Holding Phase
Hold the 90 degree position with elbows bent, forearms vertical, and shoulders stable. Keep your body still, legs together, and core engaged. Focus on squeezing your lats and biceps while breathing steadily.
Finishing Position
Slowly lower yourself back down with control, allowing the elbows to extend. Keep your shoulders active until you reach a full hang. Reset your grip and body position before starting the next rep or hold.
Assisted 90 Degree Chin Ups Workout Plan for All Levels
Beginner: 2 sets of 10–15 second holds or 3–5 reps, 2–3 minutes rest, 2 times per week
Intermediate: 3 sets of 15–25 second holds or 5–8 reps, 2–3 minutes rest, 3 times per week
Advanced: 4 sets of 25–40 second holds or 8–10 slow reps, 2–3 minutes rest, 4 times per week
What Are The Benefits Of Assisted 90 Degree Chin Ups
• Builds biceps and upper back strength
• Improves elbow and shoulder stability
• Helps progress toward unassisted 90 degree holds and chin ups
• Strengthens grip and core control
Common Mistakes to Avoid
• Using too much assistance: Takes tension away from the arms and back
• Shrugging the shoulders: Reduces lat engagement and strains the neck
• Swinging the body: Removes control and lowers training quality
• Letting elbows flare: Places stress on the elbows and shoulders
Similar Exercises To Try For Your Workout
• 90 Degree Chin Up Hold
• Assisted Chin Ups
• Negative Chin Ups
FAQ About “Assisted 90 Degree Chin Ups”
5-8 reps, 3 sets. Keep the tempo slow, about 2 seconds pulling and 3 seconds lowering. If you can do more than 8 reps easily, drop to a lighter band. The exercise should feel hard by rep 5.
Start with a medium band (30-50 lbs). You want enough help to complete the reps with control, but not so much that you're barely working. If your elbows can't stay at 90 degrees, the band is too light.
Different purpose. Regular assisted chin-ups build full range pulling strength. 90 degree versions build angle-specific strength and bicep endurance. I program both, but the 90 degree version is better for building toward holds and one-arm work.
2-3 times per week with at least 48 hours between sessions. The biceps and elbows need recovery from the constant tension at 90 degrees. If your elbows feel sore the next day, back off to twice a week.
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