Non-Scale Victories - not breaking in half

I'm in my 6th week of visiting a personal trainer (gosh is that feels much longer!) and I'm starting to have more non-scale-victories to celebrate (I don't weigh or measure myself). This week it was a certain TRX exercise (the first one on this video) which I've hated since I first tried it. Don't get me wrong, I still hate it. But the small celebrations are still note-worthy and they help with motivation.

The lady in this video make the move look so easy; while on your knees, just lean forward and back. Like a superhero taking flight. The first time I attempted it, it took a good 25 seconds to just get over the fear of launching myself forward. Once I'd finally lunged, I was honestly pretty scared for my spine, it felt like I'd snap in half, like the letter v. It hurt each time, and the fear didn't lessen, despite having to do 10 of them.

This week, for the first time, I felt a change. Rather than 25 seconds of fear, I'm down to about 10, but more importantly my spine doesn't feel like its about to break.  I still squeal, and its still clunky and stuttered. But compared to where I started, its clear that a core of some sort is starting to develop. Brilliant.