If you're a casual-to-obsessed observer of fitness trends ... At lower intensities, from rest to Zone 2, the body relies mostly on fat for energy. Fat is an efficient fuel source, but requires ...

Zone 1 (55-65% of max heart rate): This is the "conversational pace" zone. You work at a light intensity, so you can easily chat without losing your breath. This pace is ideal for burning fat and is ...

With wearable fitness trackers being all the rage ... Because technically there is a heart rate zone where your body burns more fat, but the speed at which it burns makes it a little more ...