An artilce on the latest home exercise systems (1250 to 1500 words)

**I am looking for someone who has written lot of exercise and fitness/helath content.** This article will look into the several latest commercial home exercise systems such as p90x, designed to help improve fitness and lose weight. Find out 4 such systems (all need to be latest and most popular ones, and if you are not sure what they are, please ask in a popular exercise/weight loss forum) write about what each one is, who it is designed by, how it works (in conjunction with anything else?), what it promises, how realistic are the promises. You will need to write a brief introduction on what such exercise systems are before analysing each one. One good way to look into the success of each system is to find out what users are saying about them. You can do this on impartial forums/sites rather than customer feedback on sites selling such systems as they are often biased. You will conclude (after having analysed each system from what you have read) which system is the best and why. You could also write if such systems are even necessary to become fit and lose weight? Aren't there more simpler ways to reach this objective? The article needs to be unique, written from your findings based on the research you've done.