Overweight or not (I am overweight) exercise is really important. As long as it doesn't result in hiring or advancement bias, it should be incentivized because it lowers corporate benefit costs in aggregate and improves the performance of the workforce. A large body of scientific studies exist showing that it:

Improves cognitive function (https://www.ncbi.nlm.nih.gov/pubmed/24696506)

Reduces sick leave (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2092583/)

Improves happiness/ more brain cells (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4789405/)

Smarter, happier people that miss less work are going to be more successful. Some people are born more gifted in this respect, but exercise can be very effective at narrowing that advantage for the rest of at surprisingly little cost in money and time.