According to verywellfit “Cardio exercise simply means that you're doing a rhythmic activity that raises your heart rate into your target heart rate zone, the zone where you'll burn the most fat and calories.”
1)
Overload PrincipleTo make improvements in your fitness you need to overload your body. You need to stress or challenge the bodily system (aerobic/musculoskeletal) beyond what it is used to.
2) Specificity Principle
Your exercise program must be specifically related to your training goals.
3)
Individuality Principle
"Everyone is different, which means everyone is special)
4) Reversibility Principle
Not being as good as something as you used to.
You need to
1. Find a quiet space where you can focus.
2. Play soft music in headphones to help relax your mind and avoid distractions
3. breathe
1.3 million earths would fit the sun
