I believe Polar HR monitors are all waterproof. They just say not to press any of the buttons after it is already submerged. I have used mine successfully in the water many times. Two things affect HR while swimming: the cold water will result in a HR lower than expected, as will the fact that you are prone.
Fitness Minutes: (54,048) Posts: 3,151 4/15/12 7:10 A
SparkPeople, SparkCoach, SparkPages, SparkPoints, SparkDiet, SparkAmerica, SparkRecipes, DailySpark, and other marks are trademarks of SparkPeople, Inc. All Rights Reserved. No portion of this website can be used without the permission of SparkPeople or its authorized affiliates.
SPARKPEOPLE is a registered trademark of SparkPeople, Inc. in the United States, European Union, Canada, and Australia. All rights reserved.