You Think You Are Strong?

​"You think you're strong with all that running, ah? Try sanding the deck, you punk!" I joked with myself as I sand my deck for 4 hours straight today. 
Squatting, lunging, kneeling down to put pressure, my muscles were feeling the burn.

No surprise, I am now with more soreness than I did after completing a 100km run! And I reckon I have another 12 hours of sanding ahead of me.

But hey, why not turn this into an opportunity to work on my core strength and grow stronger glutes?