20 Additional Facts about your Maximum Heart Rate 1. Maximum heart rate does not predict better athletic performance. 2. Maximum heart rate does not predict worse athletic performance. 3. Maximum heart rate does not reflect your current level of fitness. 4. Maximum heart rate is the highest number of beats per minute that your heart can contract in one minute. 5. Maximum heart rate is not affected by your current level of fitness. It isn?t higher if you are more or less fit. 6. Maximum heart rate cannot be increased by training. 7. Maximum heart rate cannot be increased by training eating certain foods, getting stressed out, or drinking energy drinks. 8. Maximum heart rate may be test-day sensitive particularly if you are not properly rested before taking a maximum heart rate test. 9. Maximum heart rate is altitude sensitive, decreasing ~ 1 bpm per 1,000 feet of elevation. 10. Maximum heart rate varies greatly among people of the same age. 11. Maximum heart rate is frequently measured at over 200 bpm in children. 12. Maximum heart rate cannot be estimated by using any mathematical formula. 13. Maximum heart rate is the 100% value or the top of Zone 5, the Red Line Zone in the Heart Zones Maximum Heart Rate Chart. 14. Maximum heart rate can be assessed relatively accurately by using sub-maximum testing protocols. 15. Maximum heart rate can only be sustained for 15-45 seconds before you are forced to stop. 16. Maximum heart rate in adults has been measured as low as 155 bpm and as high as 240 bpm. 17. Maximum heart rate is higher those with a small heart size or mass. 18. Maximum heart rate is often higher in women. 19. Maximum heart rate of an elephant is ~30 bpm and for a hummingbird is ~500 bpm. 20. Maximum heart rate is the anchor point for setting your five Heart Zones Training(Max HR) training zones. Another one; Body Position on the Bike will Influence Heart Rate. Let's say I am riding on an indoor bicycle trainer with my upper body parallel to the ground (Hands on the drops) at a heart rate of 145. Raising upright while continuing to cycle at the exact same workload will result in an increase in heart rate of about 5 beats per minute. Trust me I have experimented with this effect on many a winter evening! This is due to decreased venous return in the more upright position. Heart rate increases to compensate for the slightly decreased venous return and stroke volume, keeping cardiac output constant. Whe I return to the drops, the heart rate drops again. BikeMax2006-09-28 05:10:29