Lie on your back with knees bent and feet flat on the floor. Hold a kettlebell at your chest (or in both hands depending on variation). Engage your core and begin sitting up, curling your spine off the floor in a controlled motion. As you rise, press the kettlebell overhead until your arm is fully extended. Pause briefly at the top in a tall seated position with the weight stable overhead. Slowly reverse the movement: lower the kettlebell back to your chest while rolling your spine down one vertebra at a time to return to the floor. Repeat for reps.
Log your kettlebell sit up press sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.