We’ve been helping triathletess go faster for 29 years.

When the mag launched in 1989, the way to estimate your maximum m heart rate was to subtract your age from 220. The team behind the mag wanted you to know that they’d help you achieve your athletic potential, so they incorporated ‘220’ intoto the title to reflect that. that The method for finding your max heart rate may have changed, but the mag’s promise remains the same.