Overcome the reasons you don't workout

New Relationship
Sure, you already have the girl, but adventurous activities can help you keep her. Buy a pair of mountain bikes or a pair of tennis rackets. Sharing new experiences mimics the brain's response to falling in love.

Major injury
Set a goal. You'll allow yourself to let go of your immediate disappointment and look beyond the injury. Depending on your rehab progression, aim for a mile swim or a 5-mile hike 6 months from the date of your injury.

New job
Identify the office athlete. You're more likely to maintain a fitness routine if the responsibility doesn't rest entirely on you. Approach the lunch-hour runner or the after-work gym fiend and adopt aspects of his routine until you develop one of your own.

New Baby
Cut your fitness program in half. Do shorter, more intense exercises, and you'll be less likely to quit working out altogether. Swap your hour long jog for half an hour of sprints, for example, or condense your lifting routine with supersets.

New Neighborhood
Join a new gym before you pack the moving van. You'll create a subconscious commitment to exercise regardless of geography. Use internet search engines ahead of time to chart new running routes and to search for a fitness center by zip code.

Vacation
Enjoy your time off. A couple weeks of rest gives your muscles and mind a chance to heal and restore. Afterward, ease back into your workout. Cut your number of sets and reduce the weight you lift by 20 percent for a week before blasting back to your routine.