Started off with some 30 seconds, pen on paper. Not caring about a nice drawing but trying to get a convincing balance of weight and thinking about the pelvis/torso relation. Some turned out ok...but it's kinda hard admittedly!
Then filled a page (A4) with some 1 min poses:
I then opted to draw a dancing sequence, looking at how the shape of the leg changes and what muscles we can see. One thing I really do too often when I draw from imagination is to draw too many lines, and draw all the muscles. I really want to simplify this and just "suggest" muscles by contours and overlapping lines. I used a color pencil to draw the muscles I could see, but none of them really deserved a black line, except for some lines on the knee.
And because I am not a sexist pig, here is a longer male study :) Funny enough this type of drawing is starting to look like Loomis, even though I did this unintentionally I also ignored the perspetive line I drew around his waist...I was just really interested in how the stomach area is different from the female form.