Your new fitness trainer is not necessarily the buff guy named Chip at the gym. This trainer does not cost $60 an hour, either. Do you have your cell phone on you? If so, that sleek mobile wonder could be your next fitness trainer.

For $5.75 a week, you can sign up for Sensei's mobile phone fitness trainer. It works like this -- enter a bunch of information on the Web about your diet and fitness likes, weight and fitness goals and even habits you're trying to shake. Sensei will crunch it all together for a personalized program just for you, delivering fitness facts, customized meal ideas, reminders to take your meds and a motivational kick in the pants to keep you on track via text messages to your cell phone.

With an instantaneous click of a button you can refine your program to perfection. Sensei tracks your results and offers a 24-hour customer service team with dietitians on hand. To get a taste of Sensei, try their free, 3-day trial -- no strings attached. I'm always misplacing my cell phone for hours at a time, so I doubt Sensei would work for me. But if you respond well to motivational post-its on your fridge reminding you to stay away from the ice cream, a cell phone personal trainer may be of interest.

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