Can On-Body Monitoring Devices Help with Weight Loss?

By Ted

I was recently sent a BodyMedia FIT body monitoring device to try out.

I had heard about these devices and was a bit curious as to how they worked and what information they tracked.

bodymedia-fitUpon receiving my device, I discovered that FIT Tracks:

  • Calories Burned
  • Calories Consumed
  • Calorie Balance
  • Physical Activity
  • Steps Taken
  • Sleep Duration
  • Weight loss progress

All through a small device worn on the arm, which is synced to a computer or a mobile device.

I Wore BodyMedia FIT for 2 Days

I was instructed to wear FIT on my left arm for at least 23 hours each day. Since I’m pretty tech savvy, it was fairly easy to set everything up and once I mastered the basic interface and enetered my target data, I was good to go.

The device was relatively comfortable to wear once I found the balance between too tight and too loose. I wore it for two days and nights and then analyzed the data FIT had collected.

Since I didn’t have any weight to lose, I set my device to “maintain”. Here are some of my results.

Calories Burned


Target Calories Burned vs. Actual Calories Burned

The device showed that I was at a small calorie deficit for the day and accurately displayed when I was burning the most calories, which was during my bike ride.

Physical Activity


Physical Activity Throughout the Day

The FIT device accurately showed that I was most active in the afternoon, however, my bike ride was only an hour long and pretty vigorous. It didn’t seem to reflect this very clearly.

Steps Taken


My Steps Taken Throughout the Day

This was really accurate. The most steps were taken when I was out running errands and shopping, which was around 3pm.



My Sleep Duration and Efficiency

The FIT device seemed very accurate here as well, even picking up my afternoon power nap. With the amount of times I turn over while sleeping, the 71% efficiency seemed dead on as well.

Other Features


FIT Android App.

This body monitoring device also lets you track and log your daily calories as well as track your weight loss, weight maintenance and even weight gain.The FIT device has bluetooth, so it syncs to your mobile device through a free app.

This allows you to easily look at your progress and food information in order to track calories consumed.

Their App works on Android, iPhone, iPad, and Tablet devices.

Can FIT Help You Lose Weight?

I think that FIT is a great way to motivate those that are goal oriented and data driven.

Having actual daily progress data to look at can be very motivational, especially for those that see weight loss as a big mystery. FIT clearly shows what has to be done and what you are doing for weight loss to occur.

However, those that aren’t very tech savvy will probably find using FIT a bit challenging at first.

Overall, this is a useful device that could definitely motivate dieters to lose weight.


BodyMedia FIT sells for $149 plus $6.95 a month for a subscription to their online tracking tools, however, using the device with the app is free.

Click here to learn more about FIT.


  1. Tanya

    I wear the new Nike band and find that it helps remind me to be active. This device seems to give a lot more specific information. I might want this instead! Thanks: Can On-Body Monitoring Devices Help with Weight Loss?



    We should use any device that helps us get from point A to point B.


  3. Linda

    I really think this is a cool gadget. But not sure I want to spend the money on it. I would really like to see what it shows for my sleep; I often feel like I didn’t get a restful sleep.

  4. Jim Foster

    Looks surprisingly accurate…

  5. Spectra

    Damn, that looks pretty cool. I don’t have one, but I do have a heart rate monitor that I use during my workouts. I would love a device like this, but I think it might possibly cause me to go overboard as far as tracking calories and trying to burn as many calories as possible. I mean, it’s great for people that are trying to lose weight and/or are not sure about what their calorie intake is, but for people who have OCD-like tendencies towards calorie counting, it could really fuel some not-so-healthy behaviors.