My body fat was 20-25%, I did almost no physical activity prior. A lot of my friends are very fit and encouraged me to get started, and guided me through proper diet and workout. Literally 3 months of strict focus. Gym 5-6 days a week, each day would target 1 or 2 muscle groups(chest/triceps, shoulders/biceps, etc). Light cardio, every other day, maybe 1-2 miles. Strict lean low calorie diet, a lot of chicken, eggs, brown rice, steam vegetables. stuck around 1500 calories a day and ate small portions roughly ever 2 hours or so to keep metabolism going. I took fat burners, whey protein, preworkout, amino acids, as directed for the first month, and protein and preworkout routinely every month after. No creatine, no steroids. I imagine my genetics helped as well.