My Poor Tendons?

[g-bebe]

I got back from university last week and have made it my goal to get back to the gym a lot after not doing much at all during second semester.

After a workout of triceps/shoulders/forearms on a Tuesday, I felt alright. Sore, but alright... what I expected. Was able to fit in a session on the following Friday after work where I worked chest and biceps. The next morning, I woke up and I could barely extend my arms beyond 90 degrees without having to struggle against an elastic-band type feeling halfway through my bicep, through my elbow and down my forearm. I figured these were my tendons being stretched, and that during my workout I had just overdid it a bit for my first workout in a while.

The thing is, I did this same routine back in February once (where the previous time before working out had been late December), and the exact same thing happened.

It's 5 days later now and they're just about getting over it. Is this common, or could this be serious? Never happened before these two times.