GARMIN Forerunner 255S Music back massager Planning and Analysis Features HR head attachment Planning and Analysis Features HR ZONES ✔ HR ALERTS ✔ HR CALORIES ✔ % HR MAX ✔ % HRR ✔ RECOVERY TIME ✔ AUTO MAX HR ✔ MORNING REPORT ✔ RACE GLANCE WIDGET ✔ HRV STATUS ✔ TRAINING READINESS ✔ HR BROADCAST (BROADCASTS HR DATA OVER ANT+® TO PAIRED DEVICES) ✔ RESPIRATION RATE (DURING EXERCISE) yes (with compatible accessory) GPS SPEED AND DISTANCE ✔ CUSTOMIZABLE DATA PAGES ✔ CUSTOMIZABLE ACTIVITY PROFILES ✔ AUTO PAUSE® ✔ INTERVAL TRAINING ✔ IMPROVED INTERVAL (INCLUDES OPEN REPEATS Designed for function with no nonsense This style is part of the Vibram Fivefingers max feel product philosophy Get the training and recovery insights you need to run at a higher level — plus music to motivate you along the way Plan your strategy with daily suggested workouts