A few weeks ago I switched from my 4.0 to an upgraded 5.0 with ekg and blood pressure. The device, worn exactly like my 4.0, misses much of my workouts when weightlifting, doing HIIT and golf. Today I played 18 holes, walked 5000 steps over a 3 hour period and my band provided me a strain of 1.1 - no possible way. I’ve been very disappointed in this “upgrade”.