MetaBurn90 is a comprehensive program built entirely around follow-along video workouts. YouTube fitness expert Scott Herman and fellow top athletes Amber Dodzweit Riposta and Lee Constantinou provide guidance for all fitness levels, offer their tips for modifying exercises, and provide encouragement to help you every step of the way. Nobody gets left behind in MetaBurn90! If you commit to working hard alongside these coaches, you will succeed.

Weight training aims to build muscle by prompting two different types of hypertrophy: sarcoplasmic and myofibrillar. Sarcoplasmic hypertrophy leads to larger muscles and so is favored by bodybuilders more than myofibrillar hypertrophy, which builds athletic strength. Sarcoplasmic hypertrophy is triggered by increasing repetitions, whereas myofibrillar hypertrophy is triggered by lifting heavier weight.[23] In either case, there is an increase in both size and strength of the muscles (compared to what happens if that same individual does not lift weights at all), however, the emphasis is different.
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