More nitpicking, some of the exercises are for fit individual who have been training for a while. The push up with rotation is advanced as is the lunge, the side plank is semi advanced. There are two exercises I do not recommend to my clients, the crunch since it is not very effective and is most often done incorrectly and the triceps dip with arms to the rear since that places shearing stress on the shoulder joint. The other core exercises make the crunch superfluous and the proper way to do the dips is between two chairs with the upper arms parallel to the body when in the up position. When lowering keep the shoulders over the hands as you bend the arms and the torso erect.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace