One of the biggest myths in the fitness industry is that you can lose fat or tone up a particular area of the body on its own. How many people have you seen hammering away at the gym on stubborn triceps, love-handles and barrel like bellies? Spot reducing doesn't work. No, really. It doesn't. You heard me - step away from the ab roller.
We cannot dictate from which part of our bodies we'll oxidize (burn) fat, and we can't turn fat into muscle :( Doing triceps press-downs will not decrease the amount of fat a person has on the backs of their arms any more than doing crunches will decrease the amount of fat they have on their stomachs.
As a person ages, their skin will become less elastic and thus conform less to their arms. So “flabby arms” can be somewhat a product of age. Any exercise that decreases body fat percentage will help a person lose fat on their arms, just as it will help them lose fat from all over the body.
Also, everyone has an area of their body where fat is naturally stored more readily. This is often the belly for men and thighs and buttocks for women. These natural areas of storage may always be more difficult to shift depending on genes and heredity.
Body fat reduction should be the first aim, and will ultimately help to give the desired result to specific body parts as well. Clean up the quality of the food going in, and stick with 'big' exercises that use a lot of muscles at once. Compound exercises formed into a circuit where you can train all your muscles and get the biggest fat burning effect are best.
We call these circuits sweaty sessions and they form the basis of your coaches programming towards your goals. Stick with this approach and you'll earn those arms you're after. Or........... you could just get a pair of these.