I found also this program makes an argument that exercise equipment generally doesn't work. This includes the Bowflex and other expensive workout machines, even though they claim to help you build and tone muscle mass.
Many women are afraid of weight training because they think they will get large, bulky muscles that look unflattering under clothing. This just isn't true, especially if you train for toning and not bulk. This is done by lifting smaller amounts of weights for a longer amount of time. For example, instead of lifting 10 lbs. weights for three sets of five, you could lift 5 lbs. weights for three sets of ten.

https://www.youtube.com/watch?v=qzBW7zoxHHI