There are more positive benefits to wearing these other than just toning muscle. Wearing them means that you are going to exert more energy- which is turn is going to burn calories. If you want to bump up your calories that are burned in your daily cardio routine, adding a few pounds to your person is an excellent way to do so. It is also going to help you enhance your endurance when running for long distances. If you strap on an extra six pounds when engaging in your daily runs, your times will be significantly slower. However, the more you wear them, the more accustomed you will be to wearing them. Once you remove the straps to your arms, you will feel that your runs is exponentially easier and you will be able to travel longer distances before becoming fatigued.