Most people mistake activity for cardio. Real cardio trains your heart—structured, measurable effort that builds endurance and strength. HupSix makes it simple and fun.
Heart rate zones show how hard your heart works—and how to make every minute count.
Your Garmin (Apple Watch, Polar, Whoop) might show less than a mile in 30 minutes of HupSix, but the heart rate zones tell the real story.
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