Scientists have completed a 40 year study and concluded that those who exercise for one half hour per day, five days per week, will on average live 3.5 years longer.   The study involved 4,121 normal adults in their daily lives.   Each was grouped into low, medium and high activity.

One half hour for five days per week, 52 weeks per year for 40 years yields 5,200 hours of exercise.   In an additional 3.5 years you will:

• sleep for (assuming 8 hours per night) 10,220 hours;
  
• Deal with hygiene for (assuming an hour per day) 1,300 hours;
  
• work and commute for (assuming 200 work days each 8 hours long and 2 hours per day of commuting) 7,000 hours;
  
• Sit down and eat for (assuming daily meals take 2.5 hours) 3,194 hours;
  
• Watch TV (assuming 2 hours per day) 2,600 hours;
  
• Be left with 3,874 hours
  

Your net lost time would be your "free time" of 3,874 hours less the 5,200 hours you spent exercising, for a loss of 1,326 hours or about two months.   Of course, if you are reading this web site, you are already too sedentary and have far too much free time on your hands as it is.