Water is almost never too cold for retriever dogs to go for a swimm

Whenever I don't feel like taking Lola for a walk or run, I play with her "fetch and retrieve" in the lake. She loves it! And it's never too cold for her, being a Lab the fur type helps keeping her warm. I figure 20-25 minutes of non-stop playing could be the equivalent to a 45-minute walk. Dogs need to exercise every day in spite of weather conditions; it's the least we can do for them after all the joy they bring into our lives. Also, I read an article that stated that playing with your dog helps to create a bond with him/her. Here is the link to the "Fetch and Retrieve" article in case you are interested. By the way, sorry about my hand shacking while making the short video, it was too cold for me!