DD#1 has just turned 14 and is starting to learn the screw and curve. PC just taught her the spin a few months ago and she has been dying to try them. We decided yo wait until after the season. She threw for the first time from the rubber on yesterday. The ball had nice movement for both pitches but dd experienced a little discomfort today in the forearm and bicep. Shoulder is fine. She is still excited about the pitche and is less concerned than I am about the stiffness. Is this discomfort normal after the first day of actually throwing these pitches? Thanks in advance.