COMPACT DO-IT-ALL WATCH

Garmin Fenix 5S The multisport Fenix comes in three sizes, of which the 5S is the smallest. Suitable for thinner wrists, it has a 14-hour battery, barometric altimeter, magnetic compass and heart-rate sensor. All three Fenix models keep tabs on your stride, measuring cadence, ground-contact time and bounce, as well as estimating your VO2 max. £500, runnersneed.com