
Otis Up
- Target muscle
- Iliopsoas, Rectus Abdominis
- Synergist muscles
- Obliques, Pectineous, Sartorius
- Equipment
- Weighted
- Body part
- Waist
- Type
- Strength
The Otis Up is a weighted sit-up performed with a plate or dumbbell held at arm's length overhead. Keeping the load far from your hips lengthens the lever arm, so the iliopsoas and rectus abdominis work against far more torque than the weight alone suggests. The obliques stabilize the trunk while the pectineus and sartorius assist hip flexion, making it a strong choice for athletes who need loaded trunk flexion.
How to do the Otis Up
- 1Lie on your back with your knees bent to about 90 degrees and your feet flat on the floor.
- 2Hold a weight plate or dumbbell with both hands and press it straight overhead, elbows locked, so the load sits above your forehead.
- 3Flatten your lower back into the floor and brace your abs before the first rep.
- 4Exhale and curl your chin toward your chest, then peel your spine off the floor one segment at a time, arms still locked overhead.
- 5Keep rising until your torso is upright over your hips, with the weight tracking in a smooth arc directly above your shoulders.
- 6Pause briefly at the top with a tall, neutral spine and the arms vertical.
- 7Inhale and lower under control, reversing the curl segment by segment until your shoulders touch the floor.
- 8Reset your brace and repeat, then bring the weight down to your chest before setting it aside at the end of the set.
Form tips
- Keep your elbows locked and the load stacked over your shoulders throughout — the long lever is the whole point of the exercise.
- Curl the spine to move the weight rather than throwing your head or chin forward; the neck should follow the torso, not lead it.
- Leave your feet unanchored if you can complete full reps that way — it keeps the iliopsoas and abs sharing the work instead of letting a foot anchor carry the rep.
- Pick a load light enough for a 2-second lift and a 2-second lower; on this movement a 10 lb plate overhead feels heavier than a 25 lb plate on your chest.
- Lift on a mat and clear the space behind your head so a missed rep never puts the plate near your face.
Common mistakes
- Bending the elbows on the way up: this drags the weight toward your body, shortens the lever arm, and cuts the load on the abs and hip flexors — you end up doing an ordinary sit-up.
- Swinging up with momentum: jerking through the sticking point hands the rep to elastic recoil instead of the rectus abdominis, and the whip at the bottom loads the lumbar spine when it is least braced.
- Letting the arms drift forward of vertical: the weight stops resisting trunk flexion and instead hangs off the shoulders, which is both less effective and rough on the shoulder joint over volume.
- Slamming the eccentric: dropping back to the floor skips the half of the rep where the abs work hardest and can bang the load against the ground behind your head.
- Yanking against a foot anchor: hooking the feet and pulling hard lets the hip flexors alone finish the rep, so the abs get less work than the load on the bar suggests.
Frequently asked questions
What muscles does the Otis Up work?
The primary movers are the iliopsoas and rectus abdominis. The obliques stabilize the trunk against rotation, and the pectineus and sartorius assist hip flexion as you sit up.
How is the Otis Up different from a regular weighted sit-up?
A standard weighted sit-up keeps the load on the chest or behind the head, close to your center of mass. The Otis Up holds it overhead at arm's length, which lengthens the lever arm so the same absolute weight produces much more torque for the abs and hip flexors to overcome.
What weight should I start with for the Otis Up?
Start with a 5–10 lb plate or a light dumbbell and earn the load with a controlled tempo before adding more. The overhead position multiplies the effective resistance, so weights that feel trivial on a chest-loaded sit-up are plenty here.
How many sets and reps should I do?
Three sets of 8–12 controlled reps suits most lifters. If you can grind out 20 with good arm position, add weight rather than reps — sloppy high-rep sets on this movement usually mean the elbows are bending.
Can the Otis Up hurt my lower back?
It can if you use too much weight, drop into the eccentric, or arch the lower back off the floor at the bottom. Brace before each rep, keep the lumbar spine in contact with the floor at the start, and control the descent. If loaded spinal flexion aggravates your back, an unloaded sit-up or an anti-extension brace is a safer starting point.







