Health & fitness

Each of these has more than one accepted formula and they disagree, sometimes by a lot. Every page names the one it used.

• BMI Body mass index, the band it falls in, and the healthy weight range for your height.
• BMR What your body spends doing nothing, and what activity adds to it.
• Body fat Body fat from a tape measure, using the US Navy method.
• Ideal weight Four published formulas, and how far apart they are.
• Lean body mass Everything that is not fat, by three formulas or from a measured percentage.
• Waist to height The measure that beats BMI, and needs one number BMI ignores.

These build on each other: a resting rate, then an activity multiplier, then a split into protein, fat and carbohydrate.

• Calorie deficit What to eat, how fast the weight comes off, and how long it takes.
• Macros A calorie target split into grams of protein, carbohydrate and fat.
• Protein intake How much protein a day, as a range rather than a number.
• TDEE & calories Daily calories to maintain, lose or gain, with a macro split.
• Water intake A starting figure from your weight and how much you train.

Training numbers derived from a single test or a recent effort, using the published formulas coaches actually use.

• Calories burned What an activity costs, and how much of that you would have burned anyway.
• Heart rate zones Five training zones, by percentage of maximum or by heart-rate reserve.
• One-rep max Estimated 1RM from a set, by two formulas, with a training percentage table.
• Running pace Pace per kilometre and per mile, with the race times it produces.
• VO2 max From a twelve-minute run, or from your resting and maximum heart rates.