If you have a dog, you know you must go out if the weather is windy, rainy or sunny... Anytime, every day.
First, use a proper leash for walking. I'm not a fan of retractable leashes as they are not safe, especially for untrained dogs. (Many people use it because it's more comfortable and because they wouldn't like it if their dogs are pulling, but that leash teaches your dog pulling is acceptable). If possible, teach your dog with a standard short leash and use it for walks.
Use the correct leash size – I know some pages recommend using a very short leash, especially for big breeds (if you are in busy places…etc.), but that's not healthy for your dog for long. As I mention below, dogs need to sniff and explore the world, but with those very short leashes, they can't, and that control can lead to more unwanted behaviour.
A well-trained dog can walk nicely on a standard leash, even if it's a big breed.
Dog size doesn't show how many walks they need, some smaller breeds are more energetic, and some big breeds are lazier… Always check the breed activity level before you get a dog! Every dog breed needs daily walking.
If you have a garden, that's not enough for your dog! Dogs need different stimulations for mental health and to be tired, and they get this during their walk.
Let your dog be a dog, and let him sniff! This doesn't mean you need to stop and wait 20 minutes next to each bush; if you do it right, your dog can enjoy a walk, and you don't need to stop every 2 meters. I know everyone wants a dog walking in heel position during their whole walking, but please do not forget the heel command you should use only if necessary (be in a crowded area or because of any situation when you need to keep your dog close to you). The heel command is not the same as non-pulling behaviour; sometimes, that is what people mix.
Our leash and off-leash training type is helping you if you are struggling with your dog's walk: https://www.victoriadogtraining.com/leash-off-leash-training