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.
As of now, grape seed extract may be available as a high blood pressure supplement but the best results can still be achieved if accompanied by lifestyle and diet changes. Embarking your faith on the sole use of grape seed extract for high blood pressure is an unhealthy decision.