Weak Curls - because they make you feel humility

Circa 10 years ago I came across this bicep movement out of necessity.  The aftermath of several ego-fueled arm workouts left me with a strained bicep distal tendon.  It was pretty painful and wouldn't resolve itself through time-off.  I met with an Orthopedic Surgeon to find out the severity of my injury.  He explained to me, that one of the problems with tendon injuries, is that tendons get less blood flow than muscles.  So they are not able to repair themselves as efficiently as muscles do.  He wanted to perform prolotherapy on me.  If you are unfamiliar, basically they inject dextrose into the tendon - to help induce inflammation, provoke increased blood flow to the tendon and encourage repair.  Honestly, the thought of getting a needle stuck into my tendon gave me the heebie jeebies!  I needed a Plan B.  We discussed that typically when I would perform preacher curls, I would internally rotate (curling towards the center of my body).  Often the elbow would remain slightly bent, causing more and more internal rotation of the elbow joint.  To counter act what I had been doing, I needed to do the opposite - externally rotate.  Now with the injury the Orthopedic Surgeon had me do a ridiculous amount of reps with a light weight to mimic the prolotherapy.  It was a lot more difficult than I expected.  But it worked.  Once I was "healed" I continued to do this curl because: it was tough, it gave me a killer pump, and it kept my biceps humble.  Give it try!