Emmanuel Lacroix is one of the few people to have competed in multiple summer and winter paralympics. He began his paralympic career in 1988 in the swimming pool, competing in A8 classification races and winning a bronze in the 100m butterfly and silver in the 100m backstroke and freestyle races. He competed in 1992 in Barcelona but without success. For the next summer games in 1996 Lacroix changed to athletics and won a bronze in the T44-46 classification 1500m and 5000m races. In 2000 he ran the 5000m and marathon, winning a silver in the 1500m and a bronze as part of the French 4 × 400 m relay team. The 2004 Summer Paralympics brought a bronze in the 4 × 400 m.
In his first winter games, in 1994, he competed in the 7.5 km free technique LW5-8 biathlon and in cross-country skiing 10 km free, 5 km classical and 20 km classical technique for LW6/8. He again competed in 1998 Winter Paralympics where he won a bronze, in the 15 km free technique race for LW5/7, 6l8 as well as competing over 20 km and 5 km classical styles. His last paralympics was in 2006, in the 7.5 km and 12.5 km standing biathlon and the 5 km, 10 km and 20 km standing cross country skiing events.