Table 8.4.

Classification of physical exercise

Denomination	Characteristic
By the predominant metabolic pathway
Alactic anaerobic	High intensity and very short duration
Lactic Anaerobic	High intensity and short duration
Aerobic	Low or medium intensity and long duration
By pace
Fixed or constant	No change in pace over time
Variable or intermittent	With change in pace over time
By relative intensity *
Low or light	Quiet breathing, very little panting. (Borg < 4)
Medium or moderade	Rapid breathing, panting but controlled. Can say a sentence. (Borg 4 to 7)
High or heavy	Very rapid breathing, a lot of panting. Speech difficult. (Borg > 7)
By muscle mechanics
Static	No movement occurs and mechanical work is zero
Dynamic	There is movement and positive or negatice work

^*For exercises with implements or weights that use localized muscle groups, the relative intensity can be expressed according to the maximum load possible to perform a maximum repetition (MR). For example, light intensity - up to 30% of 1 MR; medium intensity - 30 to 60 or 70% of 1 MR. Another alternative is to use Borg's psychophysiological scales. For the above classification, the scale version ranging from 0 to 10 was used.