Training by Color: Making Sense of Your MyZone Heart-Rate Zones

Gray, blue, green, yellow, red — the tiles on the studio screen are a complete training system, once you know how to read them.

MyZone divides your effort into five colored zones based on your own maximum heart rate — not anyone else’s. Gray and blue are easy efforts, green is steady work, yellow is hard, and red is an all-out push. Because the zones are personal, a beginner and a marathoner can compete on level ground.

Also at Montana Athletic Club: spin classes, Les Mills programs, MAC membership.