Doh. Didn't think of that
Just get in a gym. Bodyweight exercises are generally much more hardcore than what can be done in the gym. They're usually way too easy or way too hard. It's a product of bodyweight being constant. Any non-beginner has to basically workout at the same intensity as this guy if he sticks to bodyweight stuff and wants to get anything out of it
Just get in the gym and do some circuits. Anaerobic endurance is where the true "in shape" is at