This tool calculates your optimal macronutrient distribution based on your fasting and fitness goals.

Input your age, gender, weight, height, activity level, and fasting protocol to receive your tailored macros.

Enter your details above

Proper macronutrient distribution is essential for maximizing energy and preserving muscle while adhering to intermittent fasting.

Examples for Intermittent Fasting & Fitness

Female, 30 years old, 70 kg, active, 16:8 protocol
Daily macros: 140g protein, 50g fat, 200g carbs
This calculation considers activity level and fasting protocol for optimal nutrient distribution.
Male, 40 years old, 85 kg, lightly active, 16:8 protocol
Daily macros: 160g protein, 70g fat, 250g carbs
The results reflect the need for higher protein intake to maintain muscle during fasting.
Female, 25 years old, 60 kg, very active, 16:8 protocol
Daily macros: 120g protein, 40g fat, 220g carbs
High activity level necessitates a higher carb intake to fuel workouts effectively.

Understanding Intermittent Fasting

Intermittent fasting (IF) involves cycling between eating and fasting periods. The 16:8 protocol is one of the most popular methods, allowing an 8-hour eating window which can significantly impact energy levels and workout performance.

Why Macros Matter

Macronutrients—proteins, fats, and carbohydrates—are essential for fueling your workouts and recovery. Balancing these nutrients helps sustain energy during workouts and preserves muscle mass, especially during fasting.

Breaking Your Fast Post-Workout

After a workout, it’s crucial to break your fast with a mix of protein and carbohydrates to replenish glycogen stores and initiate muscle recovery. Timing and nutrient choices can greatly influence your fitness progress.

Tips for Intermittent Fasting & Fitness

  1. Stay hydrated throughout your fasting period to maintain performance and energy levels.
  2. Consider your workout timing within your eating window for optimal energy management.
  3. Prioritize high-quality protein sources post-workout to maximize muscle preservation.
  4. Experiment with different fasting protocols to find what best suits your lifestyle and fitness goals.

Track all your intermittent fasting & fitness metrics in FirstRep. Start free with up to 3 clients.

Frequently Asked Questions

Can I train during fasting?

Yes, many people can train effectively while fasting. However, listen to your body and adjust intensity as needed.

What should I eat to break my fast?

Aim for a balanced meal with protein, healthy fats, and complex carbs to replenish energy and support recovery.