Its the Chromosomes, if your talking about the human cells.
Out of all of them I would say CHRIS bc your supposed to run in comfortable shoes for your feet's sake ( so that's a no to Chantelle). You are supposed to run with your arms swinging beside you or however just not still like kevin bc that burns energy you may need to finish the run. You are supposed to lengthen your stride, taking short strides for 1 burns energy and 2 it takes longer. hope this helps.
You have to give him time don’t force it on him let him make his own decisions and maybe he will be with you but you can’t force him into it. :)
Gauze , cotton swabs , gloves hope this helps