Arnold Schwarzenegger's son Patrick is hoping to follow his father's footsteps, The Daily Mail reported June 8. Patrick told his Twitter followers that he wants to gain weight and muscle for the summer season. The 19-year-old posted photos showing off his physique after a workout session and sent a message to inspire fans to get into better shape as well. "Early morning pump! Who is getting into shape for summer??!! Gonna gain 7 pounds this summer," the university student wrote. View photo Patrick posted on Twitter here.