It looks to me like you're working blind, ie; without references.
Don't do that. Before you can really start drawing imagined figures you have to be really, really, really familiar with how the body works, and to do that you really need to do lifedrawing or, at a push, work from photos.
If possible, get a friend to model for you in real life (if they don't want to go naked, wearing a swimming costume or something else reasonably well-fitted is okay), or - and pay attention this is the most important thing I will ever say - use a mirror. It's still reducing a 3d form to a 2d plane, but because you're viewing true colours rather than processed ones from a camera, you get a better sense of depth - being able to move and change your viewing angle helps that, too.
Also, what des said: KEEP IT SIMPLE, STUPID. Work with less complicated shapes, like cylinders, and build your muscles on the top of them. It's much easier to draw a simple shape like a cylinder or a cuboid in perspective and then reshape it once the perspective's working than it is to just draw a foreshortened arm outright.
Don't do that. Before you can really start drawing imagined figures you have to be really, really, really familiar with how the body works, and to do that you really need to do lifedrawing or, at a push, work from photos.
If possible, get a friend to model for you in real life (if they don't want to go naked, wearing a swimming costume or something else reasonably well-fitted is okay), or - and pay attention this is the most important thing I will ever say - use a mirror. It's still reducing a 3d form to a 2d plane, but because you're viewing true colours rather than processed ones from a camera, you get a better sense of depth - being able to move and change your viewing angle helps that, too.
Also, what des said: KEEP IT SIMPLE, STUPID. Work with less complicated shapes, like cylinders, and build your muscles on the top of them. It's much easier to draw a simple shape like a cylinder or a cuboid in perspective and then reshape it once the perspective's working than it is to just draw a foreshortened arm outright.
![[Image: 6WzBw.gif]](http://i.imgur.com/6WzBw.gif)