📚 Health & Fitness Guides
In-depth, evidence-based guides on nutrition, exercise, and body composition. Written for real people, not textbooks.
🍎 Complete Guide to Calories, TDEE & Nutrition
Learn how calories work, calculate your TDEE, understand macronutrients, and build a sustainable nutrition plan.
Read guide →🏋️ Complete Guide to Fitness & Exercise
Heart rate zones, MET values, exercise types, workout planning, and the 80/20 training principle explained.
Read guide →📏 Body Composition Guide
Body fat percentage, ideal weight formulas, BMI limitations, and practical strategies to improve body composition.
Read guide →😴 Complete Guide to Sleep & Sleep Cycles
Sleep stages, 90-minute cycles, circadian rhythm, recommended sleep by age, and 15 evidence-based tips for better rest.
Read guide →🤰 Pregnancy Health Guide
Trimester milestones, nutrition needs, safe exercises, weight gain guidelines, prenatal vitamins, and warning signs.
Read guide →💧 Hydration & Water Intake Guide
Daily water needs, dehydration stages, electrolytes, hydration myths debunked, and practical tips to stay hydrated.
Read guide →Related Calculators
Put the knowledge from these guides into practice with our free calculators:
- Calorie Calculator — Find your BMR and daily calorie needs
- Macro Calculator — Get your protein, carbs, and fat targets
- Body Fat Calculator — Estimate body fat % with the US Navy method
- Heart Rate Zone Calculator — Find your 5 training heart rate zones
- Ideal Weight Calculator — Compare 4 validated formulas
- Water Intake Calculator — Personalized daily hydration target
- Calorie Burn Calculator — Calories burned for 100+ activities