I'm 35. I haven't been flexible since I was a kid. For example, I cannot touch my hands without bending my knees. Your fingers are very cuddling. I don't know if it has anything to do with being flexible. I have been doing sports for many years. I am 1.78 tall and have 70 kilos. So I'm not flexible, not from immobility. How do you think I can increase my flexibility? I think vitamin D supplements will be good.