Joe Johnson is a well known gym rat during the off season and if these videos Dime Magazine has posted are any indication, Johnson hasn't adjusted his training regimen due to the lockout. The video above shows Johnson working out with Kevin Durant at the University of Miami. Dime says that Johnson has made the University of Miami his second home this summer.
There generally isn't enough written about what player's do during the off season to prepare for an NBA season. Johnson struggled through his worst season last year during his time in Atlanta due to various injuries including surgery on his elbow. By the looks of these videos, Johnson seems intent on bouncing back this season.