Instructions
HD32.3  - 12  -  V1.4 
Table 4: Metabolic rate – classification per category 
Class  M variation range  Examples 
 W/m
2
 W   
0 
In rest condi-
tion 
65 
(55 ÷ 70) 
115 
(100 ÷ 125) 
In rest condition 
1 
Low meta-
bolic rate 
100 
(70 ÷ 130) 
180 
(125 ÷ 235) 
Comfortable seated: light manual work (writing, typing, drawing, cutting, ac-
counting), working with hands and arms (small tools, inspection, assembly or sort-
ing of material), with arms and legs (driving a vehicle under normal conditions, 
operation of a pedal or a switch with their feet). 
Standing: work with drill (small pieces), router (small pieces), winding bobbins, 
armature winding small, with low power machines, walk (speed up to 3.5 km / h). 
2 
Moderate 
metabolic 
rate 
165 
(130 ÷ 200) 
295 
(235 ÷ 360) 
High work supported by the hands and arms: (hammering nails, polish), work with 
arms and legs (driving off-road trucks, tractors or building machinery), work with 
arms and trunk (with jackhammer, tractor assembly, plastering, handling intermit-
tent to moderately heavy materials, hoeing, harvest fruits and vegetables), push 
or pull carts or wheelbarrows light, walk at speeds between 3.5 and 5.5 km / h; 
forging. 
3 
High meta-
bolic rate 
230 
(200 ÷ 260) 
415 
(360 ÷ 465) 
Intensive work with arms and bust, bringing heavy equipment, digging with 
shovel; working with hammer, saw, chisel or plane hardwood; shearing the grass 
by hand, digging, walking at a speed between 5.5 and 7 km / h. Pushing or pulling 
carts and wheelbarrows with heavy loads; debarring castings; placing cement 
blocks. 
4 
Very high 
metabolic 
rate 
290 
(> 260) 
520 
(>465) 
A very intense work from fast to maximum; working with the dark, digging so in-
tense, climbing the stairs, ramps, walking quickly in small steps, running, walking 
at speeds greater than 7 km / h. 










