Static: They consist of stretching at rest. The muscle is stretched to a particular position and held for 10 to 30 seconds. This means stretching to the limit of what is comfortable. It is the technique to use in the stretches on this website..
Dynamic: They consist of stretching by propelling but without exceeding the limits of static stretches.
Active: It is a type of static stretch, it consists of stretching by using the antagonist muscle without external assistance.
Pasive: It is a kind of static stretch in which an external force is exercised (companion, physiotherapy,…) on the limb being stretched.
Ballistic: It is like dynamic stretching but forcing the limits of the muscles. It is done quickly and by bouncing.
Isometric: It is a kind of static stretching in which the muscles involved apply force against the stretch, the muscles involved become tense to reduce tension.
PNF (Proprioceptive neuromuscular facilitation): It is a technique which combines static and isometric stretching, consisting of a) a static stretch followed by b) an isometric contraction against resistance from the stretching position, then c) relaxation takes place followed by d) a new static stretch which increases the range of movement.