Jackknife Sit-Up
Advanced variation combining V-up elements with sit-up
Core & AbsAdvancedStrengthFlexion
At a glance
| Muscles worked | Primary: Abs |
|---|---|
| Muscle group | Core & Abs |
| Difficulty | Advanced |
| Type | Strength · Flexion |
| Sets & reps | 3 sets × 8-12 reps |
| Estimated calories burned | ~45 kcal |
How to do it
- Step 1: Lie flat with arms overhead
- Step 2: Simultaneously lift torso and legs
- Step 3: Reach toward toes
- Step 4: Lower with control
- Step 5: Repeat
Equipment
- None (bodyweight) optional
Coaching tips
Benefits
Advanced variation combining V-up elements with sit-up
Common mistakes
Using momentum
Make it harder
Slower controlled movement
Make it easier
V-up
Breathing
Exhale on jackknife, inhale lowering
Build a workout with this exercise
Plan sessions, track your progress and match your meals to your training, free.
Try it free in BmarchaiMore core & abs exercises
Lower Ab Straight Arm Hip Tuck off Bench
Intermediate · 4 sets × 10-15 repsGolfers Oblique Twist P2
Intermediate · 5 sets × 10-12 each sideSide Plank Knee to Elbow Tuck Off Stool
Advanced · 3 sets × 8-10 each sideBasketball Control Side to Side Core Pulley Row
Intermediate · 4 sets × 10-12 each sideStanding Cable Crunch
Intermediate · 3 sets × 12-15 repsFull Arm Reach Crunch on Situp Bench
Beginner · 3 sets × 12-15 repsGeneral fitness and nutrition information, not medical advice. Check with a qualified professional before starting a new exercise or diet plan, especially if you have an injury or health condition.