Many thanks for your reply! I used to run a lot, at least 3 times a week, up to 5km, not so much anymore, though definitely something I want to get back into, work makes it hard. My job can have me walking/running around the building some days, whilst others I could be at my desk for a couple of hours.
I'll order in some Ready, and some of the standard flavours I haven't tried yet (and another shaker, love these!). Many thanks for your prompt replies, it is much appreciated!