maratoolFrog Sit-Ups
How to do the frog sit-ups
- Lie with your back flat on the floor (or exercise mat) and your legs extended in front of you.
- Now bend at the knees and place your outer thighs by the floor (or mat) as you make the soles of your feet touch each other.
- Now try pushing both soles and bringing them up as near you as possible while you keep the outer thighs on the floor (or at least almost touching it). Tip: In this position your legs should create a diamond shape.
- Now, cross your arms in front of you by touching the opposite shoulders. This will be your starting position.
- As you exhale flatten your lower back to the floor while curling the torso upwards. Tip: This will be like performing the first 1/4 movement of a sit up. Hold at the top position for a second.
- As you inhale, slowly lower back to the starting position.
- Repeat for the recommended amount of repetitions.
Muscles worked
The prime movers are the rectus abdominis and the obliques, which flex the trunk forward and resist it being pulled into extension or twisted out of line.
Every exercise for:Abdominals
How this movement works
One joint changes angle and the resistance travels toward you along a single arc. Nothing is positioned to help, so tension stays where you aimed it and the usable load drops sharply against a multi-joint pull for the same muscle. Protect the range of motion; buying weight by shortening the arc defeats the point.
It is filed under strength: produce force against resistance for a countable number of repetitions, and progress the resistance over time.
What you need
No equipment at all. The resistance is your own bodyweight, so you progress by changing leverage, range or tempo rather than by adding plates — and you can do it anywhere.
Every exercise using:Body only
These train the abdominals too, using equipment this one does not:
- Kettlebell Figure 8kettlebell
- Kneeling Cable Crunch With Alternating Oblique Twistscable
- Landmine 180'sbarbell
- Medicine Ball Full Twistmedicine ball
- Side Bend with Dumbbelldumbbell
Difficulty
Listed at intermediate level. It assumes you already own the underlying pattern and can hold position under load — if the position breaks before the target muscle tires, drop back to a beginner variation until it does not.
Of the 97 abdominals exercises in this database, 17 are listed at intermediate level.
Photos: free-exercise-db — public domain (Unlicense) Full attribution →
ⓘ Informational only — not a substitute for professional fitness or medical advice.