Unfortunately I cannot find my copy of the relevant monograph (‘Given to the Ground’: A Viking-age mass grave on Ridgeway Hill, Weymouth, Dorset Natural History and Archaeological Society Monograph 22) , but going from memory and the summary on the OA website:

The individuals were predominantly young men and had few healed or healing wounds visible on the skeletons (there were defensive wounds on some and all were decapitated, but that's another matter).

The article linked to above mentions the lack of old wounds and the prevalence of evidence for infections and physical impairments and so, if you're picturing a group of grizzled old warriors you may be disappointed.

When I get back from work I'll try and find the monograph and flesh the answer out a bit but, as I've just moved house, it may be tricky.

Here's another link you may like to read.

Edit: Formatting and added some links.

p.s. I'd like to point out that there were a some very interesting Roman and Iron Age remains very close-by that frequently get over-looked in favour of the Vikings.

EDIT: Unfortunately I couldn't find the monograph, sorry!