"There are times when you think everything is against you and you won't see days like this, but the physios were brilliant," Parker told Leeds' official website.
"Every time I had a down moment they put an arm around me. The lads have kept my spirits high as well.
"I've only been training a few weeks and now it's a case of building my fitness.
"I need a few more reserve games and hopefully I can push towards the first team again."