Review: Wahoo Fitness Stride and Heart Rate Sensors

Going out for a run used to just be about lacing up your sneakers. Now when you head out, you can feel like you're drowning in tech: GPS watches, sports bands, sweat-proof earbuds, smartphone apps with cadence-matching playlists. And that's before we even talk about what's on your feet.

But we wouldn't subject ourselves to this mountain of gadgetry if it didn't really help. As our goals become more minute and more ambitious, training "by feel" doesn't cut it anymore – you need the hard performance data and sophisticated tracking abilities only things like wearable sensors can provide.

Wahoo Fitness, a longtime favorite among plugged-in fitness freaks, has recently introduced a few new activity-monitoring gadgets. I tested the company's latest real-time pace monitor, called the Stride sensor ($55), as well as a couple of heart-rate monitors. I also tested the Wahoo Key, a $60 dongle for your iPhone that links up to your sensors and passes the data along to your favorite fitness-tracking apps.

I started by setting up the Wahoo Key, which plugs into an iPhone's 30-pin dock connector. According to Wahoo, iPhone 5 users will need to use a Lightning adapter until the company makes a new design. Setup is pretty easy, but the app guides you through the process, making the instruction manual (which is annoyingly reliant on QR codes) mostly redundant. Once the key was plugged in, I had the Wahoo Fitness app running smoothly in less than a minute. Links to download all the major compatible apps, such as MapMyRun and RunKeeper, were displayed as well.

Although a "keychain" is available for the Wahoo Key, it's small enough to lose easily. Also, I was nervous about how it protrudes awkwardly from the end of my phone, and I bet it would snap right off if I dropped the phone.

Next, I strapped on the Stride Sensor, which you attach to your shoelaces. I clipped the sensor onto my shoe and it stayed comfortably in place through an entire half-marathon.

The sensor tracks your running pace using a pair of 3-axis accelerometers. It easily links to the phone (via the Wahoo Key), where all the data is displayed and recorded. There's a slight delay in pace monitoring of only a few seconds, which is totally acceptable. Also, Wahoo lets you program your height to make its readings more accurate. It only lets you go up to 7 feet, so very few runners are going to feel left out.

The collected data could be very helpful to runners trying to teach themselves what various paces feel like. The stats of distance, time and pace are all displayed on the iPhone in large enough text to make them easy readable at the gym or mid-race.

Not content to stop there, I also strapped on a couple of the company's heart-rate devices: the Wahoo Blue HR Heart Rate Strap ($80), and the Wahoo Soft Heart Rate Strap ($50). The biggest difference between them is that the Blue HR is Bluetooth-enabled (hello, iPhone 5 people!) while the other strap requires the Wahoo Key, in all of its last-generation technological glory.

Of all the goodies Wahoo currently offers, the ability to monitor your heart rate and have your BPM displayed on your phone is the most useful. Target heart rates are essential to a well-structured training program, so this is critical data, and Wahoo delivers it with great accuracy.

According to the Wahoo website, the Blue HR will connect to the iPhone 4s, iPhone 5, the latest-generation iPads and the iPad mini. Be warned: The sensors only talk to each other for a distance of up to 10 feet, and carrying an iPad around the gym could get awkward. I could see a paired iPad being useful on a treadmill, or if you work with a trainer who's holding one while hovering nearby.

The straps that hold the heart-rate monitors against your chest are also comfortable and shouldn't bother runners (or cyclists) on even their longer workouts. Wahoo also offers an armband to carry your iPhone while you sweat ($30). The longest run I completed while testing the band was 4 miles long, and the neoprene never chaffed or got uncomfortable, but it kept my iPhone 4 very stable.

For athletes who devour tech like GU on mile 10, Wahoo Fitness is a well-known name. If you're just getting into tracking your runs or bike rides, the company's gear is a good place to start. I'd recommend looking at the Bluetooth stuff first, since it works with the newer devices via wireless pairing, and you can avoid the annoyance of the protruding 30-pin dongle.

WIRED Real-time pace monitoring is valuable for undertaking tempo runs. Heart-rate sensors give the number junkies the accuracy and reporting they crave. Gear is comfortable and keeps everything in place without fuss.

TIRED Everything is iOS-centric. Wahoo Key sticks out too far, and doesn't work with newer Apple devices unless you have an adapter. The Wahoo Key could easily be lost. Uploading music to the Wahoo app isn't worth the hassle.