Hackaday (unofficial) January 16, 2022 4:00pm Printable Portable Mask Gives You the Numbers on Your Workout #medicalhacks #differentialpressure #esp32 #exercise #mask #o2 #oxygen #physiology #respirator #sensor #sportsmedicine #venturi #vo2max #hackaday posted by pod_feeder_v2 Printable Portable Mask Gives You The Numbers On Your Workout We’re currently in the midst of New Year’s Resolutions season, which means an abundance of spanking new treadmills and exercise bikes. And one thing becomes quickly obvious while using …