Jackknife Sit-Up
beginnerstrengthpullcompound


- Body part
- Waist
- Target
- Abdominals
- Equipment
- Body Weight
Instructions
- 1Lie flat on the floor (or exercise mat) on your back with your arms extended straight back behind your head and your legs extended also. This will be your starting position.
- 2As you exhale, bend at the waist while simultaneously raising your legs and arms to meet in a jackknife position. Tip: The legs should be extended and lifted at approximately a 35-45 degree angle from the floor and the arms should be extended and parallel to your legs. The upper torso should be off the floor.
- 3While inhaling, lower your arms and legs back to the starting position.
- 4Repeat for the recommended amount of repetitions.
Get this via the API
This exercise — and the full catalog of 873 — as structured JSON.
curl -H "X-API-Key: wk_live_…" \
"https://api.work-out-db.com/v1/exercises/jackknife-sit-up"Customize the request
- Translate the response
/v1/exercises/jackknife-sit-up?lang=esLocalized name, description & steps — en · es · pt · fr - Every abdominals exercise
/v1/exercises?target=abdominalsFilter the catalog by the target muscle - Narrow by equipment & difficulty
/v1/exercises?equipment=body-weight&difficulty=beginnerFilters are combinable — stack as many as you need - Full-text search
/v1/exercises/search?q=Jackknife%20Sit-UpTrigram + full-text ranking, accent-insensitive - Sort & paginate
/v1/exercises?sort=difficulty&order=desc&limit=25sort=name|difficulty · order · limit · offset · cursor
All query parameters
- bodyPart, target, equipment, muscle
- taxonomy slug
- category
- strength · cardio · mobility · stretching · plyometrics
- difficulty
- beginner · intermediate · advanced
- force
- push · pull · static
- mechanic
- compound · isolation
- q
- free-text search (accent-insensitive)
- sort / order
- name | difficulty · asc | desc
- limit / offset / cursor
- pagination (limit ≤ plan cap)
- lang
- en · es · pt · fr
Authentication
Send your key as X-API-Key or Authorization: Bearer.
Response
Always { data, meta, requestId }. Rate-limit & quota counts ride in X-RateLimit-* / X-Quota-* headers.
Plans
Free: 5k req/mo · 30/min · 480p. Pro: 100k/mo · 120/min · 720p + commercial use.
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