During follow-up participants walked on average 8300 steps and those individuals in the lowest genetic risk score developed obesity defined as a BMI greater than 30 approximately 13% of the time while those individuals in the highest genetic risk or developed obesity 43% of the time.  

 participants at the 75th percentile of PRS risk needed to walk 2280 more steps daily than participants at the 50th percentile to have the same relative risk reduction. Conversely, participants at the 25th percentile needed to walk 3660 fewer steps daily than those at the 50th percentile for the same relative risk reduction.

https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2816822