It’s all very well to know how far you ran, cycled and swam. But the whole point of exercise is not just to clock the miles. It’s supposed to make you more fit. So, how do you know if all those sweaty miles are actually doing any good? One way is by measuring your heart rate recovery time.
Fortunately, watchOS 4 provides a reliable way to see this data, and thus monitor changes in your fitness level. Here’s how you can use Apple Watch to keep your workout goals on track.