hDrop – Wearable Hydration Monitor

I *just* received my order of the hDrop gen 2 wearable hydration monitor, and used it for a short 45 min easy Zone 2 run. Based on my interest of sweat analysis, I was curious to compare my results to other tests I have done in the past. I plan to continue to use it for more sessions, and it will be interesting to see how the results fluctuate with the seasons.

MetricPrevious ValuePer hDropNotes
Avg Sweat Rate37Oz/h16.4Oz/hMy previous values were cycling, temps were relatively cool
Avg Sodium Concentration716mg/L – 1023mg/L901.1mg/LRange of 5 tests, last 3 were all at 1000mg/L +- 50.

After my first quick and dirty test, the unit is probably quite accurate on the sodium concentration, but I am unsure about the sweat rate. My past sweat tests were done based on weight loss during the exercise, cycling (not running) and majority were indoors. Based on the effort and ambient temp, I think around a 500ml sweat loss seems correct.