Hurt back raising mast

I bought my first sailboat in May (a Pico, now added a Laser Radial), and have raised and lowered the mast each time I sailed, about 25 times.

On Friday, as I was raising the mast on the laser, I hurt my back. I ended up rolling the sail around the raised mast, and tying with the cunningham as I could not take the mast back down.

Despite some moderate wind over the weekend, the laser did not move back and forth too much (it is tied to my lakeside dock in the bow and stern), so now I am...

Hurt back raising mast