FizzUp is a strength training method based on bodyweight resistance. If you prefer, you can also add equipment to your workouts, like dumbbells and/or a pull-up bar. You can use equipment that you already have at home to give your workout some variety.
For men, there's a "pull-up bar" option at the beginning of the level when you select the "Build Muscle" goal.
You can also unlock the "Build Muscle with Equipment" or "Sculpt My Body with Equipment" goal.