The 255 is available in a range of iterations. A smaller size, on test here, comes in a 41mm case size, while a larger option sports a 46mm case. Both cost £299.99, but a music option, with space for up to 500 songs, is an extra £50.
Activity profiles include much of what you’d expect, including running (indoor, track, trail etc), cycling (indoor, outdoor, MTB etc), pool and open-water swimming, plus a multisport mode, which wasn’t present on the 245. GPS connection is quick and painless, and HR accuracy is as good as we’ve come to expect from Garmin.
Additional useful features include Training Status, Training Effect, Performance Condition, Acute Load and Recovery Time and heart rate variability. The latter measures the freshness or fatigue of your neural system and…
