Melbourne Rebels new recruit Kurtley Beale could miss his new Super Rugby team's pre-season warm up matches as his body can't handle the increased training workload.

The Rebels have signed two new star players in Beale and fellow Wallaby James O'Connor and both were expected to play for their new team next Friday.

However Beale has been coaching youths in Frankston but is not convinced that he will be ready to play and is taking every precaution to ensure he will be ready for the Rebels first match against the Waratahs on March the third at AAMI Park.

"The hammy coming along really well, it's the body that's not reacting as well and as strong as I'd like," the 23-year-old fullback told AAP.

"The loading has been pretty intense so I've got to ease my way back into it and really recover after some long sessions.

"Some guys react to different training loads and for me, it's unfortunate that I'm not really reacting as promisingly as I'd like.

"We'll see how we go because the trials are just trials and the main focus for me is to get fully fit for round two against the Waratahs."

Beale suffered the initial hamstring injury playing for the Wallabies in the Rugby World Cup quarter-final match against South Africa and the re-injured it in the third place play off.

Beale said that there had been no no tears or strains in the hamstring but it was his poor recovery from training that was the concern.