I like this double kettlebell sit up because it forces you to use your abdominal muscles without getting any momentum from your arms or legs.
Caution: loading this movement with two kettlebells can be very humbling.
The challenge is to stabilize two separate weights without bending your wrists or elbows. Take a deep breath, engage your abs and reach to the sky. Imagine that there is a magnet on the ceiling pulling your arms straight up – not forward.
Since my legs are heavy and make up more than 50% of my height, they stay on the ground for the most part. If your legs do not provide a counter balance, they may fly up unexpectedly. A wider foot position can make this easier. I encourage you to resist the urge to anchor your feet though. You will never develop the strength if you use assistance from the start.
Instead, pattern this movement and build up the abdominal strength by practicing without any external load. You can gradually increase the resistance with a light bumper plate or medicine ball and work your way up to a set of kettlebells.
Try it out and let me know what you think! If you have any questions comment below or send me an email.