I hate to get up in this shit and look like I'm bragging and all, but if I lifted weights at all right now, I could very easily curl the 20lb DBs.
VERY easily. For at least one set of 10 or 12. At least.
your bicep muscles are fairly weak and not designed to take a whole lot of weight that why people rip them all the time the only bicep excerise i do directly are hammer curls they get big enough from doing bench squats and deads
The one I find works the best for tendonitis......or some thing that feels like it (cause odds are you don't have it) is the full arm bi stretch...(arm against pole, straight out) rolled into the finger stretch...extending all of your fingers to the pole to continue the stretch......I'm sure there's a name for these stretching exercises........but I'm not one of the cool guys with my A.C.E. certification........so let's just call em' that........