Bottom line: At the end of the workout, Option B burns more total calories from fat despite the lower percentage. 40 are greater than 30. In my professional opinion, if you want to maintain your weight, stay in the fat burning zone. Sure, doing something is better than doing nothing, but why aim so low? Even if you are a beginner, you can do interval training. Interval training can simply be defined by alternating periods of work and rest. The intensity of the work interval will dictate the duration of the interval. There are a variety of strategies on how to implement interval training into your exercise program which are beyond the scope of this blog post.
Please read the originial post here: https://www.pulsefitnessaz.com/fitness-myths/