Incentive Programs

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So my gym here has an incentive program. You log how many miles you run, swim, or bike and if you reach a goal (they set), you get a t-shirt! I've never encountered this at my gym back home and since I have a limited time here, I almost feel MORE motivated to reach the goal they put. Anyone else encounter an incentive program like this? Did it help motivate you?

It seems like I don't care so much about a t-shirt, but they've put a number down in front of me (Swimming 60 miles) and now I'm excited to try!