There are 4 types of flexibility namely : Active, Passive, Dynamic & Static.
DYNAMIC : the ability to move muscles and joints through their full range of motion during active movement. Such flexibility helps your body reach its full movement potential during daily activities, sports, and exercise. This improves performance and reduces the risk of injury.
STATIC : The term static flexibility refers to an individual’s absolute range of motion that can be achieved without movement. In other words, how far we can reach, bend or turn and then hold that position.
ACTIVE : Active stretching eliminates force and its adverse effects from stretching procedures. Active stretching stimulates and prepares muscles for use during exercise.
PASSIVE : the ability to assume extended positions and then maintain them using only your weight, the support of your limbs, or some other apparatus(such as a chair or a barre).
There are various methods to improve Flexibility such as PNF, Isometric stretch & hold, Ballistic and many more.
Research paper 📑: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3273886/
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