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HOUSTON -- Former President George H.W. Bush is undergoing more physical therapy as part of treatment for a painful cough that has forced him to stay in a Houston hospital for almost two weeks.

Methodist Hospital spokesman George Kovaciksaid Wednesday that the 41st president remains in stable condition with a bronchitis-related cough.

Kovacik says the 88-year-old Bush has been increasing his physical therapy activities, such as getting up and moving around more Wednesday than he has in the past few days.

Kovacik says doctors are pleased with Bush's improvement. No date is set for his discharge. Bush has been hospitalized since the day after Thanksgiving.

Bush's ailment is described as not life-threatening but painful. Bush and his wife, Barbara, split their time between homes in Houston and Kennebunkport, Maine.