At the beginning of this year, when I restarted cycling, I began with a Electra Townie. With the upright position, I was constantly pulling back on the bars as I rode. About April or so, I began noticing that my elbows had started hurting on the outside of the joint!
At first, I ignored the pain, assuming that I was just having "teething pains" on my bike, but the malady persisted & got worse. I finally noticed that my elbows hurt less on days that I didn't ride. The light came on! Maybe the pulling on the bars and the elbow pain were related?
As an experiment, I deliberately began riding without pulling on the bars. The pain improved but didn't go away. I finally sold the Townie & bought a Kona with drop bars on which I don't pull back at all.
The pain has gotten somewhat less, but still persists. Am I just getting arthritis, or is there some other possible explanation? If anyone has had a similar experience, I'd be interested in hearing what helped you.