1- Increase the weight and lower the reps. An example of this would be to use the heavier (four-pound) weights for the Bicep Series, but lower the repetitions. You will feel the difference without it seeming impossible. 2- Use lighter (1-2-pound) weights and add set or two. You will feel the burn! 3- Increase or decrease the tempo. Moving slower or faster can greatly change the way the work is felt. Play with the pace of the repetitions. Be sure to maintain proper form at all times, especially if you are picking up the tempo.]]>