The fit-bit is "in style" or I should say "popular" for teenagers and adults. Once you workout with it for the first time, you wear it like it is a Micheal Kors watch. You wear it throughout the entire day because why would you want to decrease your number of steps for the day? You wear it to bed because you want to know how you sleep at night. To sum it up, once you get a fitbit you wear it 24/7, so if you are a Micheal Kors owner or expensive watch owner learn to wear your fitbit on your non dominant hand.
To begin with the pros: the fitbit tells you your fat burning zone, whether your heart rate reached cardio, and when you hit your peak. This is extremely helpful for you workout fanatics looking to stay in the fat burning zone as much as possible. When it vibrates that you've met your 10,000 step goal for the day, you feel like you just chose the million dollar case in deal or no deal ( or so we like to imagine). When you read that you burned 2,000 to 3,000 calories and you hit the red/green zone for the day, you feel as if you burned off your entire calorie intake for the day. You get into a routine after a while; a certain day you charge it, you take it off when you sleep sometimes, you leave it on your desk so you don't forget it, you only take it off to get in the shower, etc. Your fitbit becomes just as important as putting on your shoes in the morning rather than an accessory.
The cons vary in a sense of bad habits. Many people pick up on the bad habit of paying attention to the calories burned. Ignore the large pretty 2,000-4,000 number because you didn't burn off every single calorie you took in that day (if that were true I would expect to look like a Victoria Secret model by now). The amount of steps are not always accurate. For instance, if you do spin or ride a bike for cardio it doesn't count the amount of times you pedal around. We get so invested with the Fitbit that we check it in between reps or in between changing machines. The problem is, if you sweat buckets and you're working hard, your Fitbit can not read your heart rate at that moment in time. It will show up later on your app but, you want to know where your heart rate is while you're putting in work.
I have learned to check my Fitbit for my heart rate and whether I stayed in the fat burning zone as long as I wanted to or stayed in the cardio zone longer then I needed too. I do not let myself get fooled by the large amount of calories it says I burned because my heart rate getting up between walking to classes is not equivalent to the cardio I do in the gym. Know your body, set your goals, and you know whether you've really burned over 1,000 calories that day. Fitbits are awesome but don't let them fool you.