Oooh tough one. I'd say rapid weight loss. It's pretty difficult to get that no matter what you do. If that's not it then I would go with specific food combos. Hope this helps.
It is true that caffeine is one of the most widely abused ergogenic aids. Most of the people in the world drink at least one cup of coffee per day in order to get through the day without much trouble or fatigue.
I would say behavioral psychology, because I love how the mind works. What makes a person act or react a certain way. Behind ever person there’s a story and an answer of why they behave the way that they do.
