Energy Expenditure and Activities
     for a person of 60kg (132 lbs) body weight

    1W = 864cal/hr,  1HP = 745.2W ~ 0.75kW

Average person: 3,000kcal/day ~ 150 J/s (or Watts)

Standing   ~ 110W       →  A Light Bulb (100W)

Walking    ~ 300W      →  A Power Supply (PC, 300W)

Swimming  ~ 600W     →  A Toaster

Running   500~900W  →  A Horse (~1HP)  

                                                kcal/hr     kcal/day   Watt(=J/s)

    Sitting                                      72          1728             84
    Eating                                       84                               98
    Standing                                   96           2304            112
    Writing                                   102           2448            119
    Piano Playing                            144           3456            167
    Walking (3MPH, 20min/mi)       282          6768           328
    Cycling (9.0MPH, ~7min/mi)      360          8640           418
    Climbing Hill                            420         10,080          488
    Running (5.2MPH, ~12 min/mi)   480         11,520          579             
       "   (6.7MPH,9.0 min/mi)         684         16,416          795
       "  (10MPH,  6.0 min/mi)         936         22,464         936              
    Swimming                                 540         12,960          540
    Boxing                                     780          18,720         907

Energy in Foods and other Substances:

                                           kJ/g    Cal/g 
    Carbohydrate                   17          4.1            
    Fat                                  38          9.2
    Protein                             17          4.1

    Apple                                2.5       0.59
    Hamburger                       15          3.6
    Milk (whole)                       3.0       0.72    

    Coal                                 31          7.2
   Methane                            49         11.7       
   Natural Gas                       40          9.6       
   Gasoline                            48          11.5      
                            

•  "How much fat can you burn off with one hour of walking? "

• "How many hours one has to walk to burn off  one pound of fat ? "

Other Power and Other Energy Consumption:

Person            ~ 0.15 kW

Home              ~ 1  kW

Lawn Mower   ~  4 kW (~ 5 HP)

Car                  20~200 kW (25 ~ 250 HP)

Truck             100~500 kW

Train               ~   5 MW    

Cruise Ship    ~ 35 MW

Power Plant   ~ 10 GW

US                 ~ 3 TW    (T for Terra = 10¹²)

        (This is  comparable to power of a Hurricane.)

World           ~ 12 TW

Sun               ~ 4x10²⁶ W

Solar Radiation     1.4 kW/m²     
  (on Earth Surface)