Body weight exercise is an effective and sometimes brutal way to get in shape and build muscle. Just look at any male gymnast (or Crossfit woman!) and you will see bulging pecs, shapely boulder shoulders and thick arm muscles. How do they do it? They average gymnast has an intense regimen of bodyweight exercises they go through, including various pull-ups, pushups, leg lifts and so on.
The beautiful advantage of this type of equipment is how well it fits into the home gym space. Rings, pushup bars and maybe a gymnastics mat? You have all the gym you need.
Read more about pushup variations and workouts here:
Every Pushup Exercise you can Think of and the Celebrities Who do them
Which Gymnastics Rings Trainer Should you Choose?