Under Armour Heart Rate Monitor: Armour39

*The following post is sponsored by FitFluential LLC on behalf of Under Amour*


How are you?! I swear Mondays always flyyyy right by, so here we are already at Tuesday!

p.s. I’m a little late to the party, but congrats to cute Rachel on her new baby!

Under Armour Heart Rate Monitor: Armour39

So I am a numbers nerd. I don’t love math or anything weird like that (haha), but I love to know what my fitness numbers/measurements are & what they illustrate. I mean I didn’t work in a fitness facility for years as a grad student measuring people’s fitness levels and body fat for no reason! That stuff just gets me oddly excited, especially when I can TRACK my or my clients’ progress using numbers and measurements.

And heart rate monitors just make me geekily stoked for that exact reason.

Through my ambassadorship with FitFluential, I had the opportunity to try out the new Armour39 –Under Armour’s Heart Rate Monitor.

armour 39 / fitfluential

How does it work?

I knew that it obviously would come with a chest strap (how it tracks the heart rate), but what is even cooler is that you can track your workout/HR on an APP on your smart phone!

armour39 / fitfluential / under armour

At first I was a bit wary, because if you know me really well, you know that I don’t really know anything about my iphone. My husband does all the update thingies for me, and checks that it’s working fine. I know, I know, tough life. But that is what did make me wary at first of using the Armour39 — having to open an app on my phone to start the program & check how I did?

(If you don’t want to use your phone to get the FREE app and/or don’t have a smart phone, you can buy the 199$ watch).

BUT, lo and behold, it is super duper easy to use the app & track your workouts. Like so easy I could do it without reading any manual.

I snapped the heart rate piece into the chest strap, downloaded the app, put in my info, and I was ready to go!

armour39 / fitfluential / under armour

My workouts have been tracked for the past few days, and it’s been cool to see how I’ve done. 😉

The nerd in me is like, “okay, let’s see how I can do in my next workout to get my intensity up higher!”

armour39 / fitfluential / under armour

And the app saves all the workouts–so it’s really easy to use, and it’s super neat to be able to go back and look at my workouts and how I did. The really cool thing is it tracks your willpower (on a scale of 1-10). So it makes it kind of fun, and a bit of a competition with yourself–which the competitive side of me lovvveeess.

How is is better?

I like the Armour39 monitor because it seems more accurate than other heart rate monitors I’ve used in the past, and it spits out more data. Remember, I am a numbers dork in that fitness tracking department, so I definitely love that about the Armour39!

You can see how you did overall, and you can look more closely at your heart rate and intensity levels during the entire workout, your peak and average heart rate, and you can also see what your overall willpower and heart rate/intensity were too.

armour39 / fitfluential / under armourarmour39 / fitfluential / under armour

{from two different workouts}

See all those HR peaks? It’s so fun to see that on ‘paper,’ huh?

armour39 / fitfluential

I am definitely a fan of my new heart rate monitor!


Well, I am off to teach some earlllllyy a.m. BodyPump! I’m hoping I can amp up my intensity and in turn get my participants to really get their day started on a super note!

Have a WONDERFUL day! <3

What heart rate monitor have YOU been using & love??! Are YOU good with smartphones??! What is YOUR workout today??!

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  1. Wantttttt!! I have a polar. Its prob my 4th or 5th one. Hope pump goes well!!

  2. That thing looks freakin’ awesome. I might have to get me one of those. It’s important to know that heart rate!!

  3. Very interesting! I did a review on Pear heart rate monitor today and I am so interested by the stats! Have you used other heart rate monitors in the past? How do the calorie burbs compare to each other?
    Jana @ Happy Wife Healthy Life recently posted…PEAR Sports: Monitoring My Heart RateMy Profile

  4. That looks so awesome! I’m also a fitness numbers nerd. It kind of made me numbers-obsessed but I’m definitely getting past that :)
    Miranda @ Loving Every Mile recently posted…things i’m pinning tuesday vi {let them eat cake}My Profile

    • yah, it is awesome to know where you are at fitness-wise to increase fitness level, but not to make it an obsession. You’re doing great, Miranda! :)

  5. That looks so awesome. I would love to just see the intensity aspect. I use a Polar HRM but I am always having trouble with it. It really bums me out because no HRM is cheap!
    Heather @fitncookies recently posted…Types of Cardio Workouts + Full Body {Workout}My Profile

  6. Great review my friend! Looks like a fun little gadget. I’m a fan of numbers too! 😉
    Ashley @ My Food N Fitness Diaries recently posted…Cookies & Cream Quest Bar GiveawayMy Profile

  7. Compatible only with iPhone :(

  8. My OCD brain NEEDS this for numbers.
    [email protected] my Miles! recently posted…Training Talk Tuesday: MotivationMy Profile

  9. I’m a total numbers nerd and would absolutely LOVE this if heart rate monitors worked correctly on me. Haha. I’d be such a competitive geek with myself. How does it measure “willpower”?

    I have one that I like and sometimes use just to get an idea of my heart rate and spikes, but all of the other data is actually inaccurate for me because of a medication I take (I’ve been slightly tachycardic since I can remember so the medicine slows my heart rate to normal). I remember being super sad when my doctor told me that HRMs would never be right in terms of “target heart rate” and everything. In fact, I can’t even figure out my target heart rate. Sigh.
    Breanne recently posted…Sneak Peek: Sweet Lil Pumpkin [Newborn]My Profile

    • Oh interesting about your meds–and how that affects an actual HR reading. It makes sense, but I hadn’t thought about that. Sorry you can’t necessarily know where ‘you’ should be at. You could have a max effort test done, and that would probably tell you where you can be at with HR? :)

      As for willpower –it is a new measure for this kind of HR monitor and it uses an algorithm tracked by the monitor that combines what you did, how long your workout was, gender/age, and key HR measurements to put it on a scale from 0-10!

      • Ooh, I don’t think I’ve ever considered the max effort test. I could definitely see how that might work. I’ve also thought about asking for a prolonged heart rate monitoring from the doctor to get a more accurate look at what “my normal” is during certain activities and whether or not the timing of my medicine influences that.

        I love the idea of the willpower measure – I would LOVE to see that analysis for me, especially comparing classes or even mixes (like, if I do the same Flow mix twice a week for two to three weeks, how would my willpower change?????).

        How was the comfort of the strap? It looks bigger than most straps.
        Breanne recently posted…Sneak Peek: Sweet Lil Pumpkin [Newborn]My Profile

        • yah, the max effort test isn’t fun or easy, but it is definitely the most accurate out there! It was painful to do when I did it :/ hah.

          So true about comparing mixes of tracks from Les Mills classes-I feel like sometimes I am way more tired than others. Good idea!

          The strap was actually pretty comfortable–yes it is wider than some you might have seen. I also noticed that it didn’t move or slip at all–where as some other ones have for me.

        • Hah. Yes, I will do it and post about it soon! Good idea! Spectrum it is, soon! :)

  10. Thank you Annette! You are so sweet :) I am so glad that she is here, she is truly a little miracle. I have never worked out with a heart monitor, but I would love to try one out just to see where my fitness levels are at. It would motivate me to work harder as well!
    Rachel @ My Adventures as a Rinderknecht recently posted…Rosalie’s Birth Story Part TwoMy Profile

  11. Do you wear an arm holder for the phone during BP? or can the phone be just near (in a purse) to be able to record the readings?

    this looks super cool.. i am nerd :)

    • I don’t wear the phone, no. I just start it on the app, and then leave it in my bag and teach! so yes, it picks it up from a bit away (I am usually on a stage 6-10 feet or so away from my bag). It is super cool….nerds unite!! 😉

  12. I totally needed this review! I’ve been wanting a heart rate monitor for the longest time. I haven’t the slightest idea what to get, so this will be super helpful in making my decision.
    Holly @ EatGreatBEGreat recently posted…{Guest Post} Food and Drink Trends of 2014My Profile

    • Yah, I really like it! It’s nice to have the info all within an app instead of an external watch. At first I wasn’t so sure, but after a few times, I realize how awesome that was :)

  13. Great review!! I’ve been searching and researching for a heart rate monitor! I think that it would really help with the intensity of my workouts! :)
    [email protected] recently posted…Love Me A Three Day Weekend.My Profile

    • Yah it is so fun to know how you did/do in workouts! :) ANd it’s easy when you just push a button in an app on the iphone!

  14. I’m not big on heart rate monitors. As someone with a disordered eating past, the numbers can be triggering. However, I think it’d be interesting to wear one for a day or 2 just to get a picture how my body functions. My workout today needs to be quick…I’m thinking a super quick circuit.
    Sarah @ Sarah Sincerely recently posted…Finding My Fitness StyleMy Profile

    • I totally get the triggering! Such a good point!

      I used to be the same way, but with my full recovery, and a huge emphasis & focus on fitness -not calories or whatever, it has helped to see improvements in an area that I can measure. 😉

  15. Sounds like a winner!

  16. Annette, my polar ft40 just died a few days ago. I am down between purchasing the polar ft60, this underarmour hr monitor model or a fitbitforce. Thoughts? Pros/cons? What would YOU purchase? I have loved my polar for the past 3 years, but want to make sure my next purchase is accurate for mainly heart rate and calories burned ( so I can refuel properly). I take pump, step, attack, and cx, all of which are calorie scortchers and make my HR go way up. Yay endorphins!!

    • Oh I am sorry it died!

      For the armour39–it’s so nice to be able to just start the app & go & not fiddle with a watch. It is through bluetooth, so sometimes it loses connection–which is annoying. As an instructor I think the watch is easier to use (the polar) but I think the polar is less accurate. Also, for the Armour39, it has more ability to put in more info which is why I think it’s a bit more accurate.

      It’s a tough call! Both have been really nice for me to be honest, I don’t know if I can say one way or the other!



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