Determine your RHR. Based on this value and your personal fitness level determine your training level as both % V02 Max and MET training level.
Calculate 3 days worth of caloric intake and expenditure. Provide me with the breakdown of calories in and out. Also based on the above data give me the daily balance. you have to do all these 6 things correctly . if you have any questions please let me know .
Additional sources
Karvonen calculator :https://exrx.net/Calculators/TargetHeartRate
Aerobic intensity ( RHR TO VO2 ) : https://exrx.net/Aerobic/AerobicComponents#Intensity
RHR/VO2 MAX relationship to atherosclerosis :https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6441756/