Whether you're trying to trim down or training for gains, tracking your metrics is the simplest way to fast-track your goals. While keeping score of your sets, reps, miles and macros – and whatever ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

Your ideal body fat percentage can depend on your age, sex, and activity level. Tracking movement and calories can help determine your body’s healthiest weight. No number is a complete picture of your ...