For exercise, it's probably more like six weeks, says Rebecca Woll, manager of personal training at Equinox in New York City.
"This is when you start to see aesthetic changes in your body," she explains.
Or take a tip from Haupert, who rented a locker at her gym so she could keep her things there all week long. This person should make you want to come to the gym!"I'll go for a run or go to the gym, but I don't think of it as exercise because that suddenly gives it a negative connotation."Whether you're a total newcomer to the fitness scene or you just need a little motivation and guidance, a personal trainer can help you set goals and develop a plan to make them happen."People think they can't afford it, but they don't realize that even just one or two sessions with a trainer can be so beneficial," says Holland.The right teacher can make a fitness class feel more like a party than a workout, whether it's Zumba, spinning or cardio kickboxing. " (Just be ready for some competition: Popular fitness instructors see their classes fill up fast, and maintain loyal followings even when they switch class times and locations.) You can even glean workout inspiration from celebrity instructors and trainers.Even if you've never met them in person, following your fitness idols on Facebook, working out to their DVDs or reading their advice in magazines can all be powerful motivators to follow their examples."Being accountable with money is a good thing," says Holland, "If you invest in a fitness regimen, you're more likely to work harder to get your money's worth." (He's learned that when he gives away training sessions for free, his clients aren't nearly as motivated.) If you can afford it, joining an upscale gym or splurging on boutique fitness classes could be just the thing you need to force yourself to actually go.