01/28/2021
HIIT or LISS? maybe MISS? Stairmaster? Recumbent bike? Elliptical? Good ole treadmill? What kind of cardio is best? What kind of cardio will get me to my goal most efficiently?
These are the kinds of questions you might find yourself asking and the answers lie inside of another question- what is the goal?
If your goal is to lose numbers on the scale, you might find it most efficient to go balls to the wall, all out effort for as long as you can manage to glue yourself to a machine. However, if you want to maintain your precious gains and avoid a cascade of metabolic backlash, a different approach might be more tactical for you.
High Intensity cardio (often HIIT) is meant to exploit the anaerobic (lacking oxygen) system of glycolysis, which creates energy from CARBOHYDRATE stores. These systems don’t work independently for very long bouts of time, and require time to recover before efficiently providing energy again. High intensity cardio can be extremely taxing on the body, and when done improperly can result in injury and burnout.
MISS/LISS or moderate and low intensity steady state cardio allows the body to use aerobic pathways (requiring oxygen) to burn FAT for fuel rather than carbs. These systems are much more efficient in the long term and can provide energy for more prolonged periods, without much negative effect.
A potential issue with any type of cardio, regardless of method, is the stress response it creates. Poor recovery from excessive cardio and lack of available energy can result in increases of catabolic hormones like cortisol that work to break down stored nutrients in muscle.
Just like any other aspect of fitness, every body works differently. Educate yourself, pay attention, and do what works for you!