Or, in the alternative, are there any entrepreneurs who believe that physical exercise results in a net negative (in terms of productivity) in light of all the other things (running ops, admin, payroll, employee retention programs, etc.) you have to do?

For those who believe that your exercise program clearly results in increased productivity/performance, what type of exercise are you engaging in (cardio/steady state, strength training/high intensity, strength training/volume hypertrophy, HIIT, functional fitness, sport specific, etc.)?