The numbers behind losing your belly in 90 days: One pound of fat is 3,500 calories. Every number below comes off that one. And once you've seen them, you can't unsee them. A 500-calorie daily deficit is 3,500 a week. That's a pound. So 20 lbs is 70,000 calories. At 500 a day, that's 20 weeks. Nobody wants to hear 20 weeks. It's still 20 weeks. Here's where it actually goes. One tablespoon of cooking oil is 120 calories. Every day for a year, that's 12 lbs you never tasted. Two beers, three nights a week, is 13 lbs a year. Nobody counts drinks as food. Going from 1,500 steps a day to 10,000 is 350 calories. Over a year, 36 lbs. None of those are diets. They're numbers you're already living with, pointed one way or the other. LIFTING Three sessions a week at 45 minutes is 2 hours 15 minutes. That's 1.3% of your week. Over six months, 58 hours total. Those 58 hours are what stand between losing 30 lbs and looking like a smaller version of the same guy. Diet alone drops the number on the scale. Lifting decides what the 30 lbs comes off. There isn't a third option. And cardio doesn't do this job. The prescription: 10-20 hard sets per muscle per week. Each muscle hit twice. Add a rep or a little weight most sessions. That's it. Anything past an hour a session is mostly cortisol. SLEEP Seven hours a night is 49 hours a week. Sleep five instead and you hand back 14 of those. Every week. Forever. An hour less a night across a year is 365 hours. Fifteen full days of sleep you didn't get. Under six hours raises cortisol and lowers testosterone. That's the exact combination that makes fat loss harder and muscle retention worse. You can eat perfectly and train hard and still hand most of it back on five hours a night. Caffeine has an eight-hour tail. The 3pm coffee is usually the reason. THE TWO NUMBERS THAT SET EVERYTHING ELSE Protein: 1g per pound of goal weight. At 180 lbs that's 180g, split across three to four meals of 45-60g. Fat loss: 0.5 to 1% of bodyweight a week. At 200 lbs that's 1 to 2 lbs. Run 1.5 lbs a week for six months and that's 39 lbs. Most people reading this don't need to lose 39 lbs. That's the whole thing on a calculator. No food is banned. No plan is magic. One number. A few habits that move it a few hundred calories a day. Three lifts a week to decide what comes off. Seven hours of sleep a night. Keep it simple and get going today.