31.   Now if he is tired, it is from the rigorous training schedule he keeps, not late hours.

32.   Now, two years older and possibly troubled by other health problems, the pontiff is facing a return to a rigorous schedule that give little space for convalescing.

33.   Ray has stuck to a fairly rigorous schedule in closing out various aspects of the investigation.

34.   The rigorous schedule took its toll.

35.   Though visibly frail with a tremor in his left hand, the pope appeared to be handling the rigorous schedule with no problem.