Oregon Scientific is a worldwide leader and innovator for lifestyle consumer electronic products. Training products are great for every day activity or high level training. If you are looking for good options without the high prices of other HR monitors, these are a great option! They offer them in both a strap version and a strapless verion.
The Stediball combines a world class slow deflate stability ball with a dynamic stabilizing material that adds 2.2 lbs of weight to the ball. The stabilizing material moves freely within the ball while performing dynamic exercises, or rests at the bottom of the ball to keep it from rolling away when not in use.