Bicycling in Denmark is convenient and safe. There are many special bicycling routes and lanes all over Denmark, which actually is quite the biking nation with a national cycling rate of 20%. In Copenhagen, Århus and Aalborg you can borrow a bike for free during the summer months.

You could also go swimming at one of the many blue flag beaches in Denmark. Or dive into the harbour in Copenhagen, which is clean enough for you to bathe in.
A unique and fun sport is kayaking on the canals of Copenhagen. You will get good exercise and a fantastic tour of Copenhagen at the same time.