Activities to improve flexibility? (homework)

Um...Well, I think the internet's right, dude.
I know that stretches such as stretching your legs as far away from eachother as possible, and then leaning towards each one in attempt to touch your feet, in time, will help 당신 be able to do the splits. We were told to do it every 일 when I used to go to dance.
But I'm no expect...

i heard somewhere that if 당신 stretch your arms every morning when 당신 wake up it supposedly improves your flexibility