Luck started early with cross-country skiing, but in 1980 he went over to biathlon.

By 1988 at the age of 21 he had already qualified for the Winter Olympics in Calgary, where he finished sixth in the sprint event.

During his seventeen-year career, Luck won eleven world championship gold medal with the last one in the relay in 2004 at Oberhof where he retired as a biathlete after this event.

With five silver and three bronze medals he is one of the most successful world championship competitors of all time.

In April 2009, Luck, on the German TV show Sport Inside (WDR), acknowledged having unwittingly been given the anabolic steroid Oral Turinabol by his trainer in the 1980s.