To keep doing sport, and discover new activities, what about a weekly challenge ?
This week, it is the beggining, so let's do something simple.
What do you think of
riding at least 60kms or 3 hours during the week ?
(you can do it in several trips).Bicycle is a special sport: since you weight is worn by the bike, all the power you deliver is used to make you move forward.
Also, it is a great habit to move or to commute. It's cheap, flexible, and according to a
UK study, it makes happier and more concentrated than the car.