From the 1920s to the 1950s, behavioral psychology dominated much of psychological thought, but the cognitive revolution of the 1950s revealed cracks in the theories of the radical behaviorists, and cognitive psychology eventually managed to gain the upper hand.
The heavyweight division in mixed martial arts (MMA) generally groups fighters between 205 and 265 lb (93 and 120 kg). Although many ambiguities exist within the lower weight classes regarding division naming and weight limits, the Heavyweight division is, for the most part, uniform.
In Olympic-style amateur boxing the weight divisions for men are: 1  light flyweight, not more than 108 pounds (49 kg) 2  flyweight, 115 pounds (52 kg) 3  bantamweight, 123 pounds (56 kg)  lightweight, 132 pounds (60 1  kg) light welterweight, 141 pounds (64 2  kg) welterweight, 152 pounds (69  kg) middleweight, 165 pounds (75 kg)