Hi Chris

What do you do for abdominals?

I'm struggling to find abs exercises.

Crunches, sits up and knee raises all aggravate my hips and lower back.

Plank is fine but doesn't seem to do much (its too easy, I suspect i'm doing it wrong actually)

I find it really interesting that you weren't working to a program. I thought that as a scientist you would have it all planned out precisely and rigorously, especially as you have had such amazing results.