How to draw the male/female figure and torso muscles?

With the project #DesWhyFit, I think it's a good idea to show you some tutorials about how draw muscles in women and men, because it's interesting for good drawers and bad drawers, that want to learn about drawing anatomy, hahaha. 
Inasmuch as my job is graphic dessigner in PE class, it's a good way to learn drawing anatomy and muscles.
I leave here some drawing exercises explained in videos.  

I HOPE THAT YOU LIKE THESE VIDEOS!! ☺



HOW TO DRAW THE MALE FIGURE AND TORSO MUSCLES?

HOW TO DRAW THE FEMALE FIGURE AND TORSO MUSCLES?

How to draw different body types?