For many runners, owning just a pair of running shoes and a tracksuit isn't going to cut the mustard. For those who want to measure their performance: distance, speed, calories burned and other metrics, a smartwatch is a great option. In addition to the aforementioned functions, many smartwatches also play music, have Bluetooth smartphone connectivity and have maps. If you want to run in the dark or fog, a headlamp is an indispensable piece of kit. Many headlamps have multiple settings including different colours and a range of strengths.