Tulowitzki is taking ground balls at low intensity, which figures to relieve stress that builds from having to watch.
"It's still tough," said Tulowitzki, who suffered the injury on April 29. "I watch all the games. When they're on the road, I turn on the TV and watch them, also. It's tough to watch, especially when we were going bad. But we got the last two. Hopefully, some good things are going to happen.
"I've been riding the [stationary] bike, doing my normal stretching, icing, light jogging [on a treadmill]. I don't know what's next, but I'm definitely getting better each day."
Tulowitzki is being reminded to stay conservative in his rehab. He has talked with outfielder Willy Taveras, who had a similar injury last year and made the mistake of rushing his rehab and having to return to the disabled list. Tulowitzki said the unpredictable nature of the injury is preventing him from guessing at when he'll be ready for an injury rehab assignment.
"If I'm feeling good, I can keep moving the exercises with more intensity and I can be back pretty quick," Tulowitzki said. "But if I have a setback, it can take a little longer. I haven't done anything at game speed, so it's tough to tell."
In other injury news:
Left-handed reliever Micah Bowie (strained left forearm) is scheduled for a light bullpen session -- about 15 pitches -- on Wednesday, and a full bullpen session on Friday or Saturday.
Right-handed starter Jason Hirsh (strained rotator cuff) and righty reliever Luis Vizcaino (strained shoulder) are scheduled for simulated games Tuesday in Tucson, Ariz. Both have already pitched in one simulated game.
Thomas Harding is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.