If you itemize your deductions on Form 1040, Schedule A (PDF), Itemized Deductions, you may still be able to deduct your personal portion of mortgage interest, property taxes, and casualty losses on that schedule. There's a special rule if you use a dwelling unit as a residence and rent it for fewer than 15 days.
According to Harvard Medical School, you will burn about 240 to 356 calories per hour doing water aerobics, which is lower than the 420- to 622-calorie expenditure from participating in one hour of step aerobics at a low intensity.
Aerobic exercise is the most efficient way to burn calories. You should aim to do 150 minutes of aerobic activity, such as walking, cycling and swimming, a week. You can achieve this target by doing 30 minutes five days a week and breaking down your activity sessions in chunks of 10 minutes.