THIS IS GREAT, THAT YOU ARE ALREADY MAKING PROGRESS!!!!!WHOOOT!! YESsssssss!!! Yay for you! I bet you must feel very pleased to be getting progress so so quickly!!! Re: your questions above, here's my two cents: #1) it's hard to always tell how a dog tolerates a sudden burst of strenuous exercise til the NEXT day......that's when dogs limp, etc. I don't know if TL's 30 minute daily run is comparable to the distance you went today,(?)no idea, but your dog is one lucky dog to get to be able to RUN every day!!!! So few dogs seem to get the chance, except for fetch in their backyards. sad. Your dog, having the benefit of daily runs, is probably way better off than many dogs are, to get in shape for 5k run. (I don't even know kilometers, i know miles.) Probably you could slowly build her up, observing for any limping the next day or two, and if it all goes well for your particular dog** you could slowly keep adding on extra distances a lil bit at a time. Seems like a good plan to me anyway. (**i myself think all dogs are individuals, many various individuals within a breed, there's laid back border collies even) #2) Well, if your dog has razor sharp recall on land, you could let her take some steps into water, and call her back. Let her go some more, call her back. Let her know, even in the water, it's same ol rules---she still has to come when you call her. Can your dog swim? Not all dogs can swim. (mine can barely swim, he is very slow at it, and tires really easily. My dog is such a lousy swimmer, i suspect the other dogs are chuckling at him, and i watch Buddy closely for signs of exhaustion, cuz he is lousy swimmer.). Pugs drown real easily, so do some other breeds. No idea if boxer bodies are good for swimming. EVen if your dog can swim in a lake or a pool, swimming in a river can be different, there are sometimes currents, undertows, and trees under the water that snag at things. Some rivers aren't much more than creeks, though. I'm picturing an actual river, no idea what all your river looks like, how deep, how fast, etc. Of course, if you do choose to let in her in the river, no leash of course, cuz they can get snared on the all the branches that are typically in most rivers. Also, if your dog swims away downstream, swimming back upstream is a lot harder usually. but, if your dog doesn't come to you on land, even with distractions around him, even long distance he comes to you, if your dog can not do that, well, your chances of getting her to come back to you in water are very very reduced.