Weight machines with a bench press option will work best for upper body mass.
To build muscles on your upper body,you have to keep lifting weight and press up for at least four times in a week
Weight lifting is probably one of the best exercises to help you build muscle in your upper body, which in turn will build up your strength. You should aim to do weight lifting only one or two times a week, making sure to rest on in between days.
if your upper body is heavier than the weight you're using, then possibly.
Throwing the discus isn't really an exercise. It's an activity. It does require a large amount of upper body strength. You can learn to build upper body strength by visiting http://www.squidoo.com/build-upper-body-muscle.
Weight machines can vary a great deal,some are designed for specific body parts.
The kneeling power ball toss is just one way to build upper body strength.
bench press
A bench press machine will be best for your upper body workout.
When you do your work out , you do not gain weight , your body uses it to build muscles.
Elliptical machines can be more effective for weight loss than treadmills. This type of work out really depends on your body. everyone's body are different.
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.
Weight training is the best way to build extra muscle and body size.