The Navy SEAL Physical Fitness Guide - Human Performance

178 Load-Bearing

Figure 10-1. Workload and Energy Expenditure

During Load-Bearing

Carrying a load at a walking pace that requires an energy expenditure in excess of

300 kcal per hour can compromise the energy reserves you will need at the desired

destination. Figure 10-2 shows the speeds that you can expect to sustain with given loads

at the designated paces: note these all result in an energy expenditure of 300 kcal per hour.

Figure 10-2. Effects of Walking Pace by Pack Weight

and Terrain

77 LBS AT 2.1 MPH

56 LBS AT 2.1 MPH

40 LBS AT 3 MPH OR 80 LBS AT 1.5 MPH OR 120 LBS AT 1.2 MPH

Hours

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

Pace (mph)

01020304 05060 7 08090 100 110 120 130

Load (lbs)

Easy Terrain

Heavy Brush

Sand