A BLUE box represents a maximal heart rate of 60% or less. This means you’re probably resting. If you’re spending a lot of time here you’re not working hard enough.
A GREEN box represents a max heart rate of 60-69%. This is your aerobic zone; you’re working with oxygen, and easily keep a conversation going while working out. For this class, and all of our classes for that matter I don’t recommend you spend much time here. Why? It’s not that taxing on your system as the other colors will be.
A YELLOW box represents a max heart rate of 70-79%. You’re starting to work. The intensity of what you’re doing is getting harder - more reps being done, heavier weight lifted, longer duration of work but you’re still able to “do work” in this color or percentage without much difficulty.
An ORANGE box represents a max heart rate of 80-89%. This is where you’re starting to feel uncomfortable. The heart rate range of 80-89% is where PIQ is designed to have you live for the majority of class. You are now in that High Intensity Training zone. You are crossing over from the aerobic training (exercising with oxygen) to crossing the line into anaerobic training (exercising without oxygen). Everything about being in the orange box is challenging and uncomfortable. Physically and mentally this is where you want to stop. Your heart is pounding. Your legs are screaming. But you CAN’T stop! This is where you make most of your fitness gains.
A RED box represents a max heart rate of 90-100%. Red is very accurate representation of where you’re at here. You’re red lining. You’re close to that point where you might need to step out for a moment or take a knee. You will go red. You will dip into that upper max heart rate range. Will you benefit from being in this upper limits of your heart rate? Yes. Is it the intent of class to have you spend the overwhelming majority of it “in the Red”. No.