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Heart rate zone calculator

❤️ Cardio Science Your Heart Rate Training Zones — Personalised with the Karvonen Method The standard “220 minus age” formula treats everyone identically. Two people of the same age but different fitness levels — one with a resting heart rate of 45 bpm, one at 75 bpm — have completely different cardiovascular profiles. The Karvonen … Read more

Water intake calculator

💧 Hydration Science Your Daily Water Needs Are Nothing Like “8 Glasses a Day” The 8-glasses rule comes from a 1945 U.S. Food and Nutrition Board report that was taken out of context and never corrected. Your real daily water target depends on your body weight, how much you move, where you live, and whether … Read more

Body Fat Score Calculator 

📊 Free Body Composition Calculator Body Fat Score Calculator — Beyond the Scale Weight alone tells you nothing about body composition. Enter your measurements and get your body fat percentage using the US Navy method, your lean body mass, your ACE category, and a personalised HealthIQ Body Fat Score out of 100. 📏 US Navy … Read more

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