They exercise your arms and chest a bit, and they burn a tiny amount of calories.
It comes naturally as you exercise and train your muscle over time.
This workout is done by a special machine that has 2 recoiling pads for both the arms. We have to flex the chest, meeting both the arms against resistance with resulting strain on the chest muscles.
pushups
nothing i know of is exactly the same for the core but a very similar exercise is the bench press for the chest and arms
Bench press
Chest Arms Abdomen Legs
Fitness ropes are used as an exercise tool to tone your arms, chest and hips. You use these ropes as a variant of a whip or recoiling lift, which in turn helps tone your arms, shoulders, chest and even core.
To build upper body strength the best chest exercise is lifting weights.Dumbells are the easiest way.Start on smaller weights and build up to heavy weights.
Dips are very effective for strengthening your triceps. Make your arms wider to put more emphasis on your chest.
The best way to have a "flat chest" is do about 30-40 sit ups a day, and do ab crunches 20-30 every day.
To do a chest press, select a weight that will allow you to do ten to fifteen repetitions of this exercise. Grab a dumbell in each hand. Lay flat on a weight bench with your feet touching the floor. Raise the dumbells straight into the air until your arms are fully extended. Bring the weights back down to your chest and repeat.