Hi @sidney

Both "post reply" and "quick reply" create a post that is accessible to all forum members and visitors to the forum.
As far as I have worked out, the difference is that "post reply" gives you access to the suite of icons and allows you, for example, to "tag" someone's username (and then their name has an @ before it, and is coloured) so that they get a "Personal Message" in their inbox and a link to the post where they have been tagged. I have done this with your name.
This is not so easily done in "quick reply" - if you know the commands for the icons, you can type these, but this has not worked for me as an alternative to using the tag icon. Not sure this is easy to follow - click on "post reply" or "full editor" and have a play!
If you want to send a message just to certain people, you can send a personal message - a bit like an email. The message stays in your outbox until the recipient opens their inbox (and the message?? Not sure on this).
Glad to hear that it's not your knee that is injured. Hope the bruising does not take too long to heal. (I had an ACL replacement last year, and recovery takes ages. My knee is fully functional now, I am very pleased to say, but I am much more aware of it, and it is more easily inflamed. That'll teach me to jump off rocks onto hard ground...!!!)
I have yet to start the cycling again - my excuse is that I am waiting to get over a chesty cold I have had for 2 weeks. I hope to start on Monday

And I WISH I was on 6:1... Since reaching goal, I have struggled not to overeat in the evenings, which has meant I have to do 5:2, even 4:3, to get back to goal. There are lots of ideas in various threads in this forum for how I could deal with this, but I have yet to find a strategy that I will stick to!!!
Spring officially starts on Monday. We are having some lovely weather at the moment, tho the forecast for Monday is wet! I am looking forward to the daylight hours increasing and the weather warming up. It has been a cold winter for us. You of course are heading in the other direction. Do you get four seasons or does your weather change rapidly from cold to hot and back again? Melbourne is known for having 4 seasons in a day!
Hope the fast days and non-fast days are going well for you.

If you haven't already, do have a good read around the various threads of interest to you - these can be very informative. Also read the info provided by the site managers/owners; lots of useful stuff.
Cheers!