Health Q&A
One question, answered directly, with the formula and the source it comes from — and the calculator that runs the arithmetic on your own numbers.
How many calories do I burn a day?
A resting metabolic rate from the Mifflin-St Jeor equation, multiplied by an activity factor…
How much protein do I need per day?
Four organisations publish different figures. The IOM RDA is 0.8 g per kg of body weight, which is…
How many grams of carbs and fat should a day contain?
The IOM publishes ranges as shares of energy, not grams: protein 10 to 35 percent, carbohydrate 45…
How much water should I drink a day?
The IOM set an Adequate Intake for total water - food and drink together - of 3.7 litres a day for…
What does a 500 calorie deficit actually do?
By the 1958 Wishnofsky rule, 500 kcal a day for seven days is 3,500 kcal, which that rule equates…
What is my zone 2 heart rate?
On the five-zone convention it is 60 to 70 percent of maximum heart rate. At age 50, with Tanaka's…
Is 220 minus age accurate?
It was never published as a validated regression. Robergs and Landwehr traced it to a line drawn by…
When do I ovulate if my cycle is not 28 days?
Count back from your next expected period, not forward from your last one. Ovulation is estimated…
How many days after ovulation does implantation happen?
Between 6 and 12 days after ovulation, with 84 percent of pregnancies implanting on day 8, 9 or 10.…
How accurate is a due date?
A due date is 280 days after the first day of the last period - a convention ACOG says assumes a…
How much weight gain does the IOM publish for pregnancy?
The 2009 IOM report publishes total gain by pre-pregnancy BMI: 12.5 to 18 kg below BMI 18.5, 11.5…
What is my A1C if my average blood sugar is 140?
About 6.5 percent, or 48 mmol/mol in IFCC units. The arithmetic is the ADA equation rearranged: A1C…