Ask Adrian: Our technology editor tackles your trickiest tech problems

Answer: You have three main choices: a basic health tracker, an advanced sports watch or a general smartwatch that covers most of your bases The question again presents itself: just how core a sports watch do you think you really want? Because the latest generation of 'general' smartwatches now do an increasingly good job of being fully competent aides for runners Apple's Watch, which is by far the bestselling general smartwatch, is a case in point.

Its recently-released Watch Series 4 is an absolutely competent running companion The new model has a few advanced features such as 'fall detection' and can even take an ECG If you want to save a few quid, Apple's Series 3 Watch does just about as good a job for running.

Another relative advantage it has over Apple's Watch is an always-on display, meaning you don't have lift the watch face towards you to spark it to life The Gear S3 doesn't run as many apps as Apple's Watch. . Source