Eager to bulk-up using just your bodyweight? To gain as much mass as possible your focus should be on high stimulus exercises. These tend to be the big, multi-joint, compound exercises that recruit the most muscles. Our workout plans are designed to increase your muscle mass as much as possible in 4 weeks. Works each muscle group hard using mostly heavy compound bodyweight exercises. Building muscle at home is surprisingly straightforward and doesn't require any fancy gym equipment. All it takes is a little creativity and a commitment to workout regularly.