Career
In indoor volleyball Kadijk started her career in 1992 at Foranto Werkendam. Other teams she played for were Sliedrecht Sport, Cornix Schelle (Belgium) and AMVJ. She was also part of the Dutch youth team in 1995. She quit indoor volleyball in 2001 to fully concentrate on beach volleyball.
Between 1997 and 2000 they were Dutch national champions.
They also participated at the 2000 Summer Olympics, where they lost both of their matches, eliminated in the second preliminary round by Lina and Petia Yanchulova, also sisters. Following the Olympic tournament Debora quit volleyball.
In Basel 2002 Kadijk/Leenstra reached the final of the European Championships. They lost this final, earning a silver medal.
They qualified for the 2004 Summer Olympics, but met little success there.
After the Olympics they split up. In 2005 and 2006 they became Dutch national champions. In both 2005 (Moscow) and 2006 (Scheveningen) they reached the final of the European Championships.
They lost on both occasions, earning two more silver medals.
