NEW DELHI: At just 18 years old, Mike Tyson followed an intense workout routine that included a unique technique called neck bridges, which helped him develop a neck circumference of 20 inches.

Mike Tyson's routine ended with a half-hour on the exercise ... 1,000 to 2,500 situps and about 30 minutes of neck bridges. Iron Mike also devised the infamous Mike Tyson squat workout to train ...