Equipment
Dumbbells
Body Parts
Biceps

Step-by-step instructions

1. Select two dumbbells and wrap towels around each handle to thicken it. Another option is to use rubber-grip sleeves like Fat Gripz (available at fatgripz.com) or Grip4orce (shown below, grip4orce.com).
2. Keeping your upper arms stationary at your sides and your palms facing, curl the weights.