Wearable technologies included a smartwatch, featuring a 3D accelerometer and optical heart rate monitor, synced with an online coaching platform for the exercise specialist and web/smartphone app ...

According to Chen, the metric is simple enough that an individual could calculate it on their own based on the data collected by a smartwatch, or it could potentially be built into smartwatch ...

Fortunately, there are more wallet-friendly alternatives available, such as the Limit Blue Silicone Strap Calling Smart Watch, typically priced at £29.99 at Argos. For a limited period ...