I connect an alternator to a bike without wheels. This setup can fully charge a battery in 6 - 8 hours. I spend half of the 6-8 hours to read a book and get my breath back.
I also make another “vehicle” with one wind turbine and one battery. The wind turbine can charge 1% of the battery per day.
What is the point of using wind turbine? Muscle power can get it done much faster.