Swimming does burn calories at a rate of about 3 calories a mile per pound of bodyweight. If you weigh 150 lbs. and it takes you 30 minutes to swim one mile (1,760 yards or 1,609 meters), then you will be using about 900 calories in one hour.
Scientists have found that the grape seed has the most concentrated form of health benefits from the grape. Grape seed extracts have been shown to improve immunity and prevent cancer. Every part of the grape plant has been used to improve health.
1 It has been used safely for up to 8 weeks in clinical trials. 2  Side effects that have been reported include a dry, itchy scalp; dizziness; headache; high blood pressure; hives; indigestion; and nausea. 3  Interactions between grape seed extract and medicines or other supplements have not been carefully studied.