11:30 AM - 30 minutes of HIIT on the Stepmill. 4.48 miles (138 AVG HR - 163 MAX HR) 230 Kcals.

2 mins.(Level 6-79 SPM)(9.3 METS) followed by 1 min (Level 11-128 SPM)(14.3 METS) x 2
2 mins.(Level 7-89 SPM)(10.3 METS) followed by 1 min (Level 12-138 SPM)(15.3 METS) x 2
2 mins.(Level 8-99 SPM)(11.3 METS) followed by 1 min (Level 13-148 SPM)(16.3 METS) x 2
2 mins.(Level 9-109 SPM)(12.3 METS) followed by 1 min (Level 14-158 SPM)(17.3 METS) x 2
2 mins.(Level 10-109 SPM)(12.3 METS) followed by 1 min (Level 14-158 SPM)(17.3 METS) x 2

The machine reads 453 calories burned. My new HRM reads 230 calories burned. WOW that is almost a 50% difference.