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The hypertrophy rep range of 8 to 12 reps is one of the most cited rules in fitness. The research says it isn't biologically privileged. Here's what actually drives muscle growth.

The standard fiber recommendation scales with calories. For lifters eating 4,000+ kcal, that math gets ugly fast. Here's why bulking and cutting need different fiber strategies.

You've heard you can only absorb 30 grams of protein per meal. The number is a practitioner extrapolation, not a proven threshold. Here's what the research actually says.

Time-restricted eating is sold as a magic bullet for fat loss and metabolic health. The longest trial ever run says it's not better than just eating less.

Most fitness apps default to 60-90 seconds between sets. The research says that's too short for trained lifters. Here's what the evidence actually shows.

Most fitness apps either ignore secondary muscle work or count it the same as direct work. Both are wrong. Here's the evidence-based middle ground.

Most fitness apps give you sets and reps but never tell you how hard to actually train. The research is clear: proximity to failure is the variable that drives muscle growth.

An honest comparison of what each app does well, where it falls short, and where JSON.fit fits in.

You're already paying for ChatGPT or Claude. Why are fitness apps charging you again for the same thing?

Generate a macro-perfect meal plan, import it, and get grocery lists and meal prep instructions — all for $9.99 once.

A step-by-step tutorial walking through the full workflow — from setup to AI prompt to imported program, ready to track.