Artistic figure sketching


I just did my first sketch of the year earlier today. Actually, i copied it from a sketch book's cover. The drawing on it attracted me. It's a figure drawing of a man in action..I like the artist's shading, looks like a detailed drawing of human's muscles from a bio textbook,very realistic and yet artistic. It took me quite a while to draw because i wana be precise- stroke direction, thickness and fine details,all those stuff. Sorry, can't post it here coz i copied. I highly respect the artist's work. Besides, mine looks like crap next to the original -_-"