10 Medical apparatus and instruments for interstitial fluid monitoring; medical apparatus and instruments for use in coaching programs; medical apparatus and instruments for use in monitoring and managing health, wellness, nutrition, fitness, and performance; sensor apparatus for use in medical analysis; health monitoring devices for use in monitoring and managing health, wellness, nutrition, fitness, and performance; health monitoring devices for use in coaching programs; patient monitoring devices for use in coaching programs; patient monitoring devices for use in managing health, wellness, nutrition, fitness, and metabolic performance; medical apparatus for determination of analyte concentrations; medical apparatus for monitoring analyte concentrations; medical sensors for monitoring analyte concentrations; medical sensors for determination of analyte concentrations; medical sensors for gathering analyte concentration data; medical devices for monitoring and providing information related to analyte concentrations; sensors for monitoring analyte concentrations, determination of analyte concentrations, and gathering analyte concentration data, all for medical purposes; sensors for medical purposes for use in coaching programs in the fields of health, wellness, nutrition, fitness, and performance; medical sensors for use in managing health, wellness, nutrition, fitness, and performance; interstitial fluid sensors for medical purposes; analyte sensors for medical purposes; patient monitoring sensors for measuring analyte levels; health monitoring sensors for measuring analyte levels