To any person who works out and their goal is too lose fat and tone up then cardiovascular exercise is going to be a part of their workout routine. There are different times to do cardio, and each person has their own preference. One should supplement cardio into their strength training routine.
The first and most commonly time to do cardio is in the morning when you wake up. As soon as you wake up and you go do cardio without in taking any calories. The reason behind this is because your body uses up all of your excess calories while you are sleeping so then when you wake up and do cardio you are burning strait fat. According to Livestrong, it also boosts your metabolism for the rest of the day.
The next strategy to doing cardio is during your workout. You will do a set of strength training and then in between sets you will do some form of cardio such as kettle bell swings, jumping jack or running in place. the reasoning behind this is to keep your heart rate in the fat burning state.
The last type of cardio is to do it after your strength training workout. While you are strength training you are burring off all of your carbs and calories that you have intake throughout the day. So once your body has used up all of your calories then you do cardio your body is forced to use the fat that it has stored.
Each person has their own preference and each persons body is different on which cardio works the best for them. Just because one cardio plan works for one person does not mean that it will work for everybody and you need to figure out which one works for you.