From the Lab

IIFYM for Lean: 115-135 lbs

May 12, 2026 · By Xavier Savage · Body Archetypes

IIFYM for Lean: 115-135 lbs

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At 115-135 lbs, gaining muscle requires eating above maintenance consistently. Most people in this category think they eat enough. They don’t. Tracking proves it.

This guide gives you 2,400-2,800 calories as your daily target, with macro breakdowns that actually build muscle instead of just adding random weight.

Macro Targets

  • Protein: 160-180g daily. The foundation of muscle growth. Every meal needs a protein centerpiece.
  • Carbohydrates: 300-380g daily. Fuel for intense training and recovery. Rice, pasta, oats, potatoes, fruit.
  • Fats: 75-95g daily. Testosterone production, meal satisfaction, and calorie density.

Cycle carbs around training if you want precision. Higher on leg and back days. Moderate on upper body days. Slightly lower on rest days. Your body handles carbs well, so don’t fear them.

How to Track

Use any free app. MyFitnessPal, Cronometer, MacroFactor. They all work.

Spend one week weighing your food. After that, you can eyeball most things. But that first week teaches you what portions actually look like. Most people underestimate their intake by 20-30%.

Pre-log your day in the morning. Enter breakfast, lunch, dinner, and your shake. See what’s left. Fill the gaps intentionally. This prevents the 9 PM panic when you realize you’re 800 calories short of your target or 400 calories over.

Sample Day

Breakfast: 3 whole eggs, 2 slices toast with butter, large bowl of oatmeal made with whole milk and honey, glass of whole milk. (~800 cal, 40g P)

Mid-morning shake: 2 scoops whey, 2 tbsp peanut butter, 1.5 cups whole milk, oats, banana. (~1,000 cal, 60g P)

Lunch: Chicken and rice bowl. 6 oz chicken, 1.5 cups rice, vegetables, teriyaki. (~700 cal, 45g P)

Afternoon snack: Trail mix and a protein bar. (~400 cal, 15g P)

Dinner: Pasta with meat sauce. 5 oz ground beef, 1.5 cups pasta, marinara, parmesan, garlic bread. (~800 cal, 55g P)

Evening: Casein shake or glass of whole milk. (~300 cal, 25g P)

Daily total: ~4,000 calories, 240g protein. Scale portions to match your exact target.

Adherence Tips

  • Drink at least one high-calorie shake daily. Liquid calories bypass the fullness signal that stops you from eating enough.
  • Switch to whole milk for everything. Easy extra 300-500 calories with zero extra chewing.
  • Add oils and butters to your cooking. One tablespoon is 120 calories. You won’t notice it, but your total intake will.
  • Set alarms to eat every 2.5-3 hours. Your hunger signals are unreliable from years of undereating. Don’t trust them.
  • Weigh yourself weekly. Same day, same time. Expect 0.5-1 pound gain. If nothing moves for two weeks, add 200 calories.

Bottom Line

Track your food. Hit your protein. Stay in your calorie range. Train consistently. The results follow.

There are no magic foods. No forbidden ingredients. Just numbers, executed daily, until the accumulation becomes visible.

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Xavier Savage

Founder, XPERFORMANCELAB

I do not shape muscle. I shape structure. The person you become is the person you construct.

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