Musil has competed in three Paralympics over two sports. In 2000 he won two gold and a silver in the athletics class F33 Javelin (gold), shot put (gold), and discus (silver) as well as a gold and bronze in the cycling class CP division 2 Mixed Tricycle 5.4 km time Trial (gold) and Mixed Tricycle 1.9 km Time Trial. This would be his last time entering cycling events as in 2004 he won the gold in the shot put F33/34 class but missed out in the discus. In the 2008 edition he competed in the combined F33/34/52 class javelin and shot and won his seventh medal, a bronze, in the discus.