@svnp01: Zone 2 or HIIT for fat loss? Zone 2 is about 60 to 70% of your max heart rate, and fat burned per minute peaks near the top of it. But across 31 studies, intervals and steady cardio tied on body fat. What wins is minutes you can repeat. Free heart rate calculator and weekly plan, link in our bio. – Del #zone2 #fatloss #hiit #santaclara #siliconvalley