Stand with feet shoulder-width apart holding a kettlebell with both hands. Press the kettlebell overhead until your arms are fully extended and keep your core tight with a neutral spine. Slowly bend your elbows to lower the kettlebell behind your head in a controlled motion while keeping your upper arms close to your ears. Pause briefly at the bottom, then extend your elbows to raise the kettlebell back overhead. Repeat for the desired reps while avoiding back arching or elbow flaring.
Log your kettlebell standing one arm extension sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.