FB Mass focuses on strength training workouts with the intent of increasing the strength, function, and power of the muscles, as well as muscle mass. This Challenge is all about pushing yourself and really making sure you exhaust the targeted muscles each day. These follow-along videos are great for diving into a muscle-building routine without having to think about how to properly cycle between muscle groups (because we've already done it for you). The structure of this routine is designed to help you get the most out of each day's workout without doubling up on, or overtraining any given muscle.

Strength training makes up the vast majority of this program, with a very slight pinch of HIIT. FB Mass workouts are 5 days a week, with an optional 6th day. Workouts range between 32-52 minutes (including your warm up and cool down), with an average workout time of 42 minutes a day. FB Mass is suitable for most fitness levels, though a basic familiarity with strength training is suggested as these are intense workouts. Knowing how your body responds to various types of strength training and when you need to increase or decrease the weight being used is also important.

Equipment used: dumbbells, a step or stair, resistance band (though modifications can be made to make the workouts bodyweight only)

FB Mass Challenge features 11 exclusive FB Plus workout videos. Your trainers will be Kelli, Daniel, Kayla, and Tasha, bringing different styles and perspectives to your strength training each day.

We encourage you to use #FBmass in our Community forums or on social media to connect with people around the world who are following this program.