W.A.K.O. World Championships 2007 in Belgrade were the joint 16th edition of the W.A.K.O. world championships - the second event would be held later that year in Coimbra, Portugal. They were for amateur male and female kickboxers and covered the following categories; K-1, Low-Kick and Light-Contact. Weight classes for men ranged from light bantamweight (51 kg or 112 lb) to super heavyweight (over 91 kg or 200.6 lb), while the women's ranged from featherweight (52 kg or 114.6 lb) to super heavyweight (over 70 kg or 154 lb). More information on the categories, weight classes and rules is provided in the various sections below. In total there were 1085 athletes at the championships, representing sixty countries including China (taking part for the first time), fighting in 49 tournaments. The Belgrade championships were held at the Pionir Hall in Belgrade, Serbia from Monday, September 24 to Monday, October 1, 2007. K-1 W.A.K.O.'s K-1 category uses the same rules set by the K-1 organization and combine a mixture of techniques from Muay Thai, Karate, western boxing and other forms of stand up fighting. The main difference between K-1 rules and other forms of kickboxing is the use of the clinch and knees – which have recently been limited to one knee per clinch. Attacks that are legal include strikes to the head (front, side and forehead), the torso (front and side), leg (any part) and foot/feet (sweeps only). As mentioned before fighters are also allowed to knees (only one hand to clinch and one knee strike per clinch) and can use the back fist/spinning back fist technique. Strikes that are illegal include attacks to the top of the head, the back, the top of the shoulders, the neck and shots to the groin. Techniques involving elbows are also illegal. Due to the amateur nature of W.A.K.O. championships all fighters must wear protection for their head, teeth, breast (women only) groin, shin and feet, and must fight with the standard gloves. Each fight is three, two-minute rounds and is scored by three judges who score successful (legal) strikes that are not blocked, and are thrown with full power. As with other forms, illegal strikes may result in a point(s) deduction or even disqualification. Unlike Full-Contact and Low-Kick it is not necessary for the minimum six kicks per round to be counte. Victory can be achieved by a point's decision, technical knockout or knockout,