You can't crunch away belly fat. Shelby Hall, RPN, MERP, founder of Skinfidelity, explains why spot reduction doesn't work and how Belkyra fat-dissolving injections can target stubborn pockets once you're near your goal weight.

How much sleep you need to recover from training, what short nights do to your hormones and performance, and the habits that help you sleep better.

What the research says intermittent fasting can do for weight loss, insulin and brain health, and the downsides to weigh before you try it.

Early strength gains come mostly from your nervous system, not new muscle. Here’s what changes as you train, what the studies say, and how to train for it.

How regular exercise helps with stress, anxiety, depression, memory and sleep, and which kinds of exercise the research supports.

Protein, creatine, omega-3s and vitamin D have good research behind them. BCAAs, fat burners and testosterone boosters mostly don’t.

How to fit strength training and cardio into the same week, depending on whether your goal is fat loss, muscle or general fitness.

How plant and animal proteins compare on protein content, amino acids and leucine, plus what the research says about soy and tempeh.

Most people trying to build muscle or lose fat need 1.6 to 2.2 grams of protein per kilogram of body weight a day. Here’s how to work out your number and spread it across your meals.

What to measure, which apps, watches and scales are worth using, and how to keep tracking without obsessing over daily numbers.