If you are looking for subwoofers that can be used to improve your home theater system I’d recommend checking out this post http://wooferguy.com/best-home-theater-subwoofer . I found the reviews to be comprehensive and very informative. I would also go for the Polka audio 12 inch subwoofer.
During my research I also found several youtube videos to be very educational in terms of health and fitness. The one I like most was about how to lose weight for women. Here is the link to the video https://www.youtube.com/watch?v=CEqsbFA7Evc , totally awesome video with good tips. This is something worth trying out if you want to lose weight fast.