Absolutely!! Our bodies know no difference between bodyweight, and the classic iron. What our bodies know is tension. To make your muscles grow, you must also add overload, a stimulus that makes your muscles want to change!! When you're training with only bodyweight, there are a few tricks that you can implement to not only develop maximal muscle tension, but to also apply that overload principal. Jeff has created XERO to be a muscle builder and I can promise you, he did not come up short on delivering just that. XERO is a beast of a 6 week program!! Click HERE to pick up XERO today!!