Why we get muscle cram after playing football for long time?

Hey there! So usually, muscle cramps occur to parts of your body that you haven't used in a long time. Once those muscles get used to the exercise they tend to not hurt or ache anymore. 

As for long period of time. I don't think there is a connection. It depends on how much you stretch that muscle during that hour. But to answer, the cramps only last for a few games- but then your body gets used to using that muscle a lot. 

Does it make sense? 

This is due to accumulation of lactic acid in the muscles and presence of oxygen debt

Twins are born minutes apart, not a year apart. fraternal twins are no more closely related genetically than ordinary siblings born a year apart. they just happen to be born at the same time. identical twins result from a single fertilized egg dividing and separating early in gestation. although identical twins are more similar to each other than other siblings, there is some research to suggest they are not 100% the same. you and your brother share very similar dna because you have the same parents, and you look the same. i'll bet you resemble one or both of your parents, and likely a grandparent or two as well.