Athlete Body & Training Profile
Fill your training info for personalized ISSN protein targets. Enter body fat % to calculate via lean body mass (most accurate).
Important Disclaimer
This Athlete Protein Intake Calculator uses peer-reviewed ISSN & ACSM sports nutrition guidelines. Results are estimated reference values based on population research, not personalized medical or dietitian advice. Protein targets vary based on training intensity, recovery, hormone status, kidney health and food digestibility. Do not modify long-term diet without consulting a sports dietitian or physician.
Your Personalized Athlete Protein Results
Nutrition Guidance Based On Your Profile
ISSN Official Protein Multipliers For Athletes
- Endurance Athletes Maintenance: 1.2–1.6 g/kg LBM
- Strength / Hypertrophy Bulk: 1.6–2.2 g/kg LBM
- Cutting / Fat Loss (Muscle Preservation): 1.8–2.7 g/kg LBM
- Vegan Athletes: Add 0.2–0.4 g/kg to compensate digestibility
Lean Body Mass calculation eliminates overestimation for users with high body fat, making targets more realistic for bodybuilders and dieters.
Athlete Protein FAQ
Why is LBM calculation more accurate for athletes?
Fat tissue requires minimal protein support. Calculating based on lean muscle mass avoids inflated targets for overweight athletes and understates needs for very lean bodybuilders.
Do vegan athletes really need more protein?
Most plant proteins have incomplete amino acid profiles and lower bioavailability. ISSN recommends a 15–20% intake increase for plant-based athletes.
How much protein per meal maximizes muscle growth?
25–40g complete protein per meal hits the leucine threshold to stimulate muscle protein synthesis for most adult athletes.