All of the Hearts players struck by the illness that led to the postponement of Tuesday’s match in Inverness have reported for Thursday’s training.
A bout of gastroenteritis left the Edinburgh club with “few fit players”, with the game rescheduled for 12 April.
Aberdeen, 12 points ahead of third-placed Hearts, visit Tynecastle on Friday evening.
“The players are over the illness and they’re ready to go,” head coach Robbie Neilson told BBC Scotland.
“They’ve taken a couple of days, as expected.
“It was a 24 to 48 hour thing and when they run out tomorrow under the floodlights in front of a full house there will be no issue about energy.”
Hearts closed their Riccarton training base on Tuesday and Wednesday to prevent the bug spreading further.
“We asked the players to go to their own gyms and do a bit of work themselves,” explained Neilson.
“It’s not the ideal preparation but it had to be done.”