Merkel, 59, fractured her pelvis while cross-country skiing in Switzerland over the Christmas holiday and was ordered to cut back her schedule dramatically and stay in bed as much as possible for three weeks.
"Now the healing process is entering the next phase and the chancellor can begin to take on more of a burden next week," the spokesman, Steffen Seibert, told reporters.
"But that doesn't mean that her pelvis is fully able to withstand stress again. That is why you will see the chancellor on crutches for several weeks to come."
However her agenda will be packed with appointments for the first time since the New Year, including talks yesterday with visiting UN Secretary General Ban Ki-moon.
Seibert said Merkel expressed her "heartfelt thanks" for the "countless get-well-soon messages from across Germany and around the world".