Running generally only makes people bulky if they are the short endomorph body type, so if that's not you, I would still suggest it 2 - 3 times per week:) If not though, you can just walk. (rachaelattard.com)
I am THE perfect example of Endomorph body, where i have a very skinny upper body (sometimes my rib cage would show when I lose lost of weight) and a very fat legs down to my «kankles». (rachaelattard.com)
Running does build a bit of muscle but is only usually a problem for women who are shorter endomorph body types. (rachaelattard.com)