Have you heard about the 80:20 ratio when it comes to fat loss and muscle gain? Many people use this 80:20 ratio to successfully lose weight and keep the extra pounds off. According to this regime, 80% of your fitness goals are met purely through diet, the remaining 20% are met with exercise. This strategy works for those looking to bulk up as well. Exercise alone won’t result in a caloric deficit, while maintaining a strict diet alone won’t give you the definition you seek.