Originally Posted by 1morerep
4. Ignoring Overhand and Neutral-Grip Moves
While grabbing a weight and curling it seems elementary for big biceps development, not all the major arm flexors are optimally worked when you use an underhand grip. In fact, when your hands are in the neutral (hammer) or overhand (reverse grip) positions, the brachialis that lies underneath the biceps and brachioradialis — the forearm muscle nearest the elbow — kick into gear. You won’t reach your genetic potential unless you include moves that target all the muscles in the biceps group. We suggest doing one of these exercises last in your biceps workout because it can adversely affect grip strength.
Nice, that would explain the aftermath of the kettlebell snatch.