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I am so broad and big-structured that even two kilos on me can look like gaining 10 kilos, and losing two kilos can also look like shedding 10 kilos.

My partner has to have good sized bones.

I think it's going to be a very important, unique data set in terms of measuring the behavior of your lower body in space and trying to figure out what we can do to preserve bone and muscle density.

I keep fit as much as I can.

I don't care what size you are or how old you are - once you see the results brought to you by regular exercise, you'll wonder how you survived without it.

The heaviest I've ever been is 65 kilos. That was during my Leaving Cert when I was just studying and eating chocolate.

I definitely wouldn't mind gaining a few more pounds at all.

Even if you have some extra kilos, you don't need to kill yourself for that; you just have to look at yourself as a positive.