I am Stan.
The girl that can run a marathon in gym class has a lot of stamina.
building muscle and increase stamina through gene therapy
There is no adjectival form of the noun stamina. You would have to recast your sentence. For example:'My friend had enormous stamina when she was running the marathon.''I have noticed that David's stamina has decreased over the past few months.'If you are taking the word stamina to mean high stamina (as opposed to being just a neutral synonym for staying-power, with no indication of how much of it the person in question has), and you want an adjectival equivalent, you could perhaps use powerful or energetic, although they are not exact synonyms.
There is only one pronoun in the sentence: she. It is a personal pronoun.
When an -ing verb is used as a noun, it's a gerund. "Jogging" is a gerund in that sentence.
Stamina is the capacity of a person to endure physical stress to achieve some objective 'OR' The physical endurance of a person.
If you smoke weed you get good stamina
its stamina is about a 6 out of 10
Stamina is what the gods ate.
Stamina is how long the horse can go for without tiring.
Sure! "Swift stamina sustains success."