I highly recommend replacing those 10kg dumbbells with a set of adjustable dumbbells like http://www.powerblock.com/blocks.html http://www.powerblock.com/blocks

I highly recommend replacing those 10kg dumbbells with a set of adjustable dumbbells like http://www.powerblock.com/blocks.html http://www.powerblock.com/blocks.html I purchased a set about 7 years ago and it's probably the best fitness/workout related purchase I've ever made in terms of overall use and value.