TomTom Spark 3: Heart rate training

Optical heart rate sensors get a rough ride (especially from us) and we think rightfully so. We've seen a handful of devices that provide accurate date. An exception to that rule was the TomTom Spark. Since the company moved from using the same technology used in the Mio Alpha 2 and Fuse, it's proved to us that optical heart rate tracking can be good.

Heart rate tracking compared: TomTom MySport v Polar H7
Thankfully it's more of the same with the Spark 3. Heart rate data is recorded as you're tracking but you can also take part in heart rate zone based training, letting you work in Sprint, Speed, Endure, Fat Burn, Easy or Custom zones. It's a nice addition to the overall setup, but crucially, accuracy is still great.
We put it up against a Polar H7 heart rate monitor chest strap for several runs and the sample below of the data compared to the H7 paired with Runkeeper shows it's still a reliable monitor. Mixing things up with some high intensity training yields similarly good results. The Spark 3, like the original Spark, houses one of the best optical heart rate monitors we've tested.
It's not 100% perfect. You will see the odd outage, perhaps twice in a two hour run, but this is absolutely a problem with chest straps as well. What you get with Spark 3 is a responsive and relatively lag-free experience that means you can effectively and reliably manipulate your heart rate to the right zone during your training – and that's what it's there for. vedere di piu watches replica e Hublot King Power