This is a very interesting chart. It is taken out of the late great Edmund R. Burke, PhD; Serious Cycling, second edition and based on research by Scott Montain and Ed Coyle from the University of Texas
Table 6.5 Heart Rate Heat Stress Index: Heart Rate Increases After Fluid Loss for Individuals of Various Body Weights
Change in Body Weight Change in heart rate in beats per minute (bmp) according to start body weight
110 lbs 130 lbs 155 lbs 175 lbs 200 lbs
1 lb 7 bpm 6 bpm 5 bpm 4 bpm 4 bpm
2 lbs 14 bpm 12 bpm 10 bpm 9 bpm 8 bpm
3 lbs 21 bpm 18 bpm 15 bpm 13 bpm 12 bpm
4.5 lbs 38 bpm 43 bpm 20 bpm 18 bpm 16 bpm
If you’re not quite sure what this all means, I’m more than happy to answer any questions you may have. Please email me!