Begin in a kneeling position with your knees together and your shins and feet on the floor.
Sit back on your heels and place your palms face down on your thighs, with your fingers pointing towards your knees.
Relax your shoulders and take deep breaths.
Hold the pose for several breaths or as long as is comfortable.
Vajrasana Variation 1 Exercise Guide - Forearms Workout | MuscleWiki