The hardest part about the side planks, I think, is getting in the correct position. It definitely feels awkward at first. I'm going to meet with a personal trainer at the gym tomorrow and, among other things, have her check my form on both front and side planks.

I'm very lucky to have a small but excellent gym close to my main grocery store and 10-15 minutes from the house. It's populated mostly by older folks in the mornings (I'm a youngster at 63) and it is so impressive what some of the 75+ crowd can do.