Heeding Chang's advice that persistence leads to success, Peng worked hard, practicing alone every day. Once he fractured his foot when he landed badly after a back flip, but thankfully this didn't stop him. Peng had developed a limber physique while in drama school in his youth, so he was less injury prone than most martial artists.
帶著張世博「堅持，才能邁向成功」的忠告，彭偉群更拚了，每天勤練私功，曾經一個「後空旋轉」著地時未踩穩，腳底板骨折，幸無大礙；由於幼年在劇校筋骨已經練開，比起一般習武者，彭偉群的受傷率不高。