The first one works if you just straighten your bottom leg and kick. The second one is great, but it hurts your pelvis bone, so get a yoga mat and support your pelvis instead of having your hands in front of you. The last two are great as is. All give a great butt workout. -wheelee
22 Kettlebell Exercise: Kettlebell Workouts For Women
For anyone who hasnt already seen me tag this.. I LOVE THIS GIRL! She has amazing work outs that usually take around 15-20 minutes and work you very hard! She puts videos on her site for beginner, intermediate, and advanced levels.