Clinical Nutrition, Metabolic Science & Fitness Metrics
The Toolio Health Team comprises clinical nutritionists, sports physiology experts, and wellness researchers. The panel authors evidence-based guides on metabolic rate calculations (BMR, TDEE), body composition metrics (BMI, Body Fat %, Waist-to-Hip Ratio), daily macro planning, and clinical health indicators in accordance with WHO and ICMR health guidelines.
A blood pressure reading of "120/80" means nothing until you know the categories. Here is the full AHA chart, how ranges shift with age, and when a number becomes an emergency.
Fasting, post-meal, random, and HbA1c blood sugar tests each measure something different. Here is the complete normal-vs-prediabetic-vs-diabetic chart for all four.
Calories tell you how much to eat; macros tell you what to eat it as. Learn how to split any calorie target into protein, carb, and fat grams for fat loss.
Two people can share the exact same BMI and have very different heart disease risk. Waist-to-hip ratio explains why — and when you should trust it over BMI.
Walking, running, and even fidgeting all burn calories differently depending on your bodyweight and pace. Here is the real math behind those numbers.
You can only conceive during a 6-day fertile window each cycle. Knowing when that window opens — and how to track it — is the most effective way to improve your chances of getting pregnant. This guide explains the biology and the math behind ovulation tracking.
The first 13 weeks of pregnancy are the most critical period of fetal development. From implantation to the first heartbeat to the NT scan — here is what happens week by week, what symptoms to expect, and which tests are scheduled in trimester one.
Sleep science is clear: most adults need 7–9 hours. But the exact amount depends on your age — and more important than hours is timing your wake-up to the end of a 90-minute sleep cycle. Here is what the research says and how to use a sleep calculator.
Your maximum heart rate determines your five training zones — from fat-burning to peak performance. The old 220-minus-age formula is outdated. Here is the more accurate Tanaka formula, a zone table for every age, and how to use each zone.
"Drink 8 glasses a day" is everywhere — but it has no scientific basis. Your actual water needs depend on your body weight, activity level, climate, and diet. Here is the formula and a table that tells you your exact target.
Body fat percentage is a more accurate measure of health than BMI. But how is it calculated, what is a healthy range for men and women, and which measurement method is most accessible? This guide covers everything.
The BMI scale classifies weight from underweight to obese — but what counts as healthy varies by age and sex. This guide explains the WHO chart, what your number actually means, and the well-documented limitations of BMI as a health measure.
