I bought these to wear while working out.  They are very minimal, and do not fit my body shape very well.  The drawstrings are tough to get tight, and the pants always end up feeling like they are about to fell.  When I went ahead and pulled them tighter, I ended up making it so tight that I could not work out comfortably.

This problem might be just me.  Since everyone is different, you may find that it is easy to get the proper tightness, and feels perfect when you do.  I never got it quite right, and it never felt quite right.  I ended up spending slightly more for some pants with elastic in the waist, and a drawstring "back-up", and those work just fine for me.