Day 8 of 100 Days Muscle Resistance Workout Challenge
Topic: Why nutrition matters for muscle growth and recovery (macronutrients overview).
Learning Material
You can train as hard as you want, but if your nutrition isn’t supporting your body, muscle growth and recovery will stall. Muscles are living tissue, and they rely on nutrients to repair, rebuild, and adapt after exercise. Understanding macronutrients—protein, carbohydrates, and fats—gives you the building blocks to make your training truly effective.
Key Insight
Protein – The Building Blocks: Protein provides amino acids, which your body uses to repair damaged muscle fibers after workouts. Think of protein as the bricks in a construction project. Without enough bricks, you can’t build a strong structure. A controlled feeding study found that evenly distributing protein intake across meals resulted in significantly greater 24-hour muscle protein synthesis than consuming most protein in a single meal, despite equal total protein intake1.
Carbohydrates – The Energy Supply: Carbs often get a bad reputation, but for active people, they’re crucial. They replenish glycogen (stored energy) in muscles, fueling both workouts and recovery. Without enough carbs, you may feel sluggish, and your muscles won’t perform at their best. Imagine trying to drive a car without enough gas—protein might build the car, but carbs keep it running.
Fats – The Silent Supporters: Healthy fats don’t directly build muscle, but they play a supporting role by regulating hormones like testosterone and growth hormone, which are essential for muscle development. They also provide long-lasting energy. Think of fats as the quiet backstage crew that keeps the show running smoothly.
Example / Story
Consider two runners training for the same 10K. One fuels with balanced meals—protein at each meal, carbs before and after workouts, and healthy fats daily. The other under-eats protein and avoids carbs, thinking it will help them lose fat. The first recovers faster, feels stronger, and gradually builds lean muscle. The second struggles with fatigue, sore muscles, and slower progress. The difference isn’t training effort—it’s nutrition.
My Reflection
I’ve started focusing on eating more protein. Because my husband has dietary restrictions, I often eat much less protein than I need, even while exercising. Like him, I noticed that my muscles were slower to recover, and instead of getting leaner, my body just stayed the same. Cutting calories too low also seemed to reduce my muscle mass, which made me realize that increasing protein is essential.
I once tried the Keto diet, but I don’t think that approach fits me—especially since I do cardio every day and need carbohydrates for energy.
Today’s protein intake looked like this:
- Two eggs in the morning
- About ⅓ cup of yogurt (with some protein)
- One protein shake
- ¼ cup of tofu (with additional protein)
Later tonight, I’ll also have some chicken, which means I’m spreading protein throughout the day. Eating multiple times at work can be tricky, but at the very least, starting my morning with protein makes a huge difference. It helps me recover better and keeps me full, which makes it easier to stay consistent.
Adjustment Ideas (Strategic adjustment)
- Add a protein source to each meal (aim for 20–30 grams).
- Choose complex carbs (brown rice, oats, sweet potatoes) instead of refined ones at least once per day.
- Swap one processed fat (butter, fried food) for a healthy fat (olive oil, avocado, nuts).
Biometric data
Change in Weight from Day 1: -2.6 lb.
Skeletal Muscle: 39.3%
Muscle Mass: 94.6 lb.
Note
- Michael M. Mamerow et al., “Dietary Protein Distribution Positively Influences 24-Hour Muscle Protein Synthesis in Healthy Adults,” Journal of Nutrition 144, no. 6 (2014): 876–880, https://doi.org/10.3945/jn.113.185280. ↩︎
Bibliography
Mamerow, Michael M., Daniel H. Pasiakos, Andrew A. Murray, Evan E. West, Michael J. Lynch, Robert R. Lynch, and Robert R. Wolfe. “Dietary Protein Distribution Positively Influences 24-Hour Muscle Protein Synthesis in Healthy Adults.” Journal of Nutrition 144, no. 6 (2014): 876–880. https://doi.org/10.3945/jn.113.185280