Workout those legs

I find a good workout for about 1 hour is to jump on your bike.
Try to throw in a challenge when planning your route like a hill or a dirt track.
A nature reserve is also a excellent place to take your bike as another challenge.
It improves leg muscles and stretches the joints.
It will also help move your other muscles and joints so they move more freely.
Drink water to keep yourself hydrated.
A good place to start building your fitness in the summer.