we seem to have a lot of stories tonight about the internet. if you're looking to keep fit on weekends, if you're one of the weekend warriors and that's when you do a lot of workouts there are tools online to help you meet your goals. dr. sanjay gupta gives us the rundown in today's fit nation. >> reporter: we live our lives online. we buy plane tickets, pay bills. why not fitness. >> when people want help, the internet can be the best way to search for it. if you can get that help immediately online, that's great. >> reporter: we put some of our fit nation experts on the hunt to look at some of the latest and greatest online fitness tools. check out the fit orbit. a real fitness trainer online. >> i love that you can pick the type of activity level wh you have a desk job, you're a frequent traveler. >> reporter: your trainer can adjust your fitness goals on a daily basis and keep track of nutrition. the biggest downside?