NEED FAST WORKOUT FOR THE NEXT 5 DAYS

ENTERED FIRST MASTERS MEET TWO WEEKS AGO . MEN'S FREE AGE 60-64. TIMED 37.54 AND WANT TO LOWER TO 34 IN ONE WEEK. (DIDN'T HAVE GREAT DIVE OR TURN LAST TIME)NEED SERIOUS WORKOUT FOR THE NEXT 5 DAYS SINCE I AM ENTERING THE PALO ALTO MASTERS COMPETION NEXT SAT.I AM JUST GETTING BACK INTO SWIMMING AFTER 40 YEAR HIATUS. THANKS!