What muscles does the stepmaster work?
958058
A good exercise for your credit card!
425781
dude try higher reps for the particular muscles or groups you are working arnold in the book pumping iron made fun of the bulked up boys in europe and the fact that they were not doing isolation excercises for particular muscles try the library or go online  to a web site for a particular body builders  training books iled Frank Zane and Franco Columbo and Arnold back in the day also cardio with wrist wieghts and do twisting motions on the diferant arm or leg muscles the more muscles that are involved the more definition you get.. an olde dude that can press his wieght still..
646742
Muscle is heavier than fat.
600325
up. but you use more muscles going down
409106
Pullups really work your biceps. The pecs do adduction, which is bringing your arm closer to your body, and internal rotation of the shoulder.. Cable pull machines are what you want to get on. Anything where you have you arm out at 90 degrees from your side, and pull down towards your leg.
145062
http://www.orionele.com/steppers.htm
81524
Squad, Dumbbell Lunge, Calf Raise, Leg Press, Leg Extention, Leg Curl
421461
when you lift your heels off the ground you can feel your calve muscles flex, however when you bend your knees and stand up you will notice that your quadricep (top of thigh) and gluteous maximus (butt) flex especially when you have some weight on your shoulders.  It is a combination of leg muscles that used when jumping.  Historically it has been the calve muscle that has been emphasized (jump soles, jump roping) but personally I think the other muscles are overlooked.  At one point in my life I rode a bike every day for over a year (not to increase my vetical) my glut grew (I now have stretch marks on both behinds) and I began dunking in basketball viciously (two hands behind head).  I'm 6'1" and white but could always jump decently.
1181567
Skeletal Muscles, the muscles that moves your limbs, eyelids, lift your face, external sphincters of your anus and urinary bladder...\n\nHeart Muscles (Cardiac Ms) - these are also made of striated tissues
71670
Work the "Triceps".\n\n1.  Aerobically...when doing stuff like step, keep your arms going up and down for the whole step class (like you're a ballarina and you form an oval with the arms, but you move this oval up and down).  Aerobics burns fat, and is highly recomended for getting rid of that arm jiggle.\n\n2.  Weights:\n  A.  Skull Crushers:  Start with a 10 lbs bar.  Lye on your back.  Take the bar and hold at a 90 degree angle from chest.  Slowly bend at elbows and bring bar down to your head <aim for your hairline>.  Do this ten times, rest and repeat another 3-4- times.  Weights build muscel which tone, and keep the muscel firm reducing muscel flab.
269825
arm muscles mostly\nthey work by contraction and expansion directed by brain synapses
169535
Strong muscles, high speed,good entegrety
956819
Tricep Kickbacks\nStand with left leg in front and place left hand on left thigh, so you are slightly bent forward. With dumbbell in right hand raise your elbow up above your waist. Keep the elbow in this position and with your forearm lift the dumbbel up and back behind you and lower (lower just the dumbbell - elbow stays where it is). Do 3 sets of 15 reps on both arms.\n\nDips\nUsing a bench (or chair) sit on the edge and place hands on bench with fingers facing the edge. Lift yourself up off the bench and keeping back close to the edge of bench lower down a few inches. The closer your feet are to you the easier it is, so to increase the intensity step the feet a little ways. Lift yourself back up, but don't sit down, continue lifting and lowering yourself for 3 sets of 15 reps.\n\nOverhead Tricep Press\nStand with feet shoulder width apart with a slight bend in the knee. With one or two dumbbells in hands raise them above your head. Keep elbows close to ears and lower weight behind you and press up. Elbows stay where the are and close to the ears - don't let them fall out. Do 3 sets of 15 reps.
593775
http://en.wikipedia.org/wiki/Gracillis_muscle
263304
The Pectoralis muscles (major and minor), Anterior Deltoids, and the Triceps are 'major players' in a push-up motion.
968215
The muscles in my lower body and torso
846608
Yes, a lil bit. Sprints strengthen calves which increase your vertical. You can also do jump roping, ladders, calf raisers.