Name: TRaining IMPulse Data Field
Author: DEATHER

Data Field showing Training Impulse

TRaining IMPulse - way of measuring the impact of exercise

This is implementation of TRIMPexp - Exponential Heart Rate Scaling (http://fellrnr.com/wiki/TRIMP):
approach that uses Heart Rate Reserve and an exponential scaling factor to account for the fact that higher intensity training as a disproportionately high training impact.


Resting Heart Rate(needed for calculation) is from User Profile.
Maximum Heart Rate(needed for calculation) is currently computed based on this equation  HRmax = 191.5 − (0.007 × age2) (https://en.wikipedia.org/wiki/Heart_rate). This is because we currently dont have access to maximum heart rate defined by user(this should be available in september 2015 and then i will change code to support maximum heart rate from watch)