Skip to main content. Founded in 1938 by Curtis L. Carlson and family-owned to this day, Carlson does business in more than 150 countries and territories. Through our portfolio of operating businesses we have always sought to make business a source of opportunity for others and an engine of positive change in the world.
Since exercise requires more energy, your heart beats faster to deliver more oxygen through the blood. By measuring how fast your heart is beating, Fitbit trackers with PurePulse technology can more accurately gauge how many calories youâre burning.ptimize your health with charts & graphs. Get instant heart rate readings all day, every day. Analyze your heart rate over time to identify trends and manage stress. Review resting heart rate trends to see when health and fitness are improving.
Results. Credit: Jeremy Lips/Tom's Guide Overall, the most accurate heart rate monitor was the Polar H7. It consistently measured my heart rate within 1 beat per minute during the entire stress test. I wore the chest strap with the node directly in the middle of my breast bone, tight against my skin.redit: Jeremy Lips/Tom's Guide Overall, the most accurate heart rate monitor was the Polar H7. It consistently measured my heart rate within 1 beat per minute during the entire stress test.