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 variation that targets the iliopsoas and rectus abdominis by extending a weight plate or dumbbell overhead throughout the movement, dramatically increasing the lever arm and core demand. The obliques, pectineous, and sartorius assist — the obliques resisting any twist through the trunk, the pectineous and sartorius adding to hip flexion. It builds functional hip flexor and abdominal strength suited to athletes who need strong, loaded trunk flexion.
How to do the Otis Up
- 1Lie flat on your back with your knees bent to about 90 degrees and feet flat on the floor.
- 2Hold a weight plate or dumbbell with both hands and extend your arms straight overhead, keeping them locked out for the entire set.
- 3Press your lower back gently into the floor and brace your core before you begin.
- 4Exhale and curl your chin toward your chest, then continue raising your torso off the floor while keeping your arms overhead and elbows straight.
- 5Rise in a controlled arc until your torso is fully upright, with the weight still extended above your head.
- 6Pause briefly at the top, maintaining a neutral spine and vertical arms.
- 7Inhale and slowly lower yourself back to the starting position under control, vertebra by vertebra.
- 8Reset your brace before initiating the next repetition.
Form tips
- Keep your arms locked out and stacked directly over your shoulders so the weight tracks straight up as your torso rises.
- Drive the movement by curling the spine, not by jerking your head or neck forward.
- Anchor your feet only if you cannot otherwise complete full reps, and work back to unanchored as you get stronger.
- Choose a load that allows you to maintain a smooth, controlled tempo — momentum defeats the purpose of the extended-arm lever.
Common mistakes
- Bending the elbows during the ascent: this shortens the lever arm and significantly reduces the load on the core, defeating the purpose of the variation.
- Using momentum to swing up: jerking through the sticking point shifts demand away from the rectus abdominis and hip flexors and increases injury risk at the lumbar spine.
- Letting the weight drift forward: allowing the arms to angle in front of vertical reduces the effective resistance and can place undue stress on the shoulder joints.
- Holding the breath through the whole set: sustained breath-holding under load spikes blood pressure and leaves you light-headed, and the rep you finally gasp through is the one that gets rushed.
- Anchoring the feet when not needed: relying on a fixed foot anchor can transfer too much of the work to the hip flexors alone and reduce abdominal activation.
Frequently asked questions
How is the Otis Up different from a regular weighted sit-up?
In a standard weighted sit-up the load is held at the chest or behind the head, keeping it close to the body's center of mass. The Otis Up extends the weight overhead, lengthening the lever arm so the core must work against a much greater torque for the same absolute load.
What weight should I start with for the Otis Up?
Most people start with a 5–10 lb plate or a light dumbbell and focus on a slow, controlled tempo before adding load. Because the overhead position multiplies the effective resistance, even a modest weight becomes challenging.
Should I anchor my feet when doing the Otis Up?
Starting without foot anchoring is generally preferred because it forces the iliopsoas and rectus abdominis to work together. Use an anchor if you are still building the baseline strength to complete full reps, then progress to unanchored as you get stronger.
Can the Otis Up hurt my lower back?
Like any loaded spinal flexion exercise, it can cause discomfort if you use too much weight, rush the eccentric, or hyperextend at the bottom. Control the descent, brace your core before each rep, and choose a weight that allows a full range of motion without compensation.
What muscles does the Otis Up work?
The primary movers are the iliopsoas and rectus abdominis. The obliques, pectineous, and sartorius act as synergists to stabilize the trunk and assist with hip flexion through the range of motion.
