HIIT (high-intensity interval training) versus LISS (low-intensity steady state)
I am not going to lie, as much as people claim cardio kills your muscle gains, I'm guilty of a love/hate cardio obsession. As long as I can remember cardio has been a huge stress reliever and mind clearer. So depending on who you are, cardio can not only decrease stress but you can also use it as a tool to achieve your goals. While LISS often gets a bad rap, it can be useful as it's often easier on joints and effectively burns fat.
However, I've always been a fan of HIIT. Incorporating 2-3 days of HIIT cardio a week, and 5-6 total days of cardio can be a huge help if you are trying to lose weight, tone up, boost metabolism, etc. LISS burns calories at the moment while HIIT revs your metabolism for the entire day allowing you to become a fat burning machine. However, since short HIIT sessions can take a toll on your body, it is recommended to not perform consecutive HIIT sessions.
Carissa Johnson, Fit Mom & WBFF Pro