Laurel hedge cutting - NOT amateur radio

We have a laurel hedge at the front (about 30m long), that we planted 8 years ago. Usually I trim it twice a year. It has grown a lot! 

Whereas I could do it all in one go, I now have several goes over several days. I am getting older and get tired more quickly. After about 10 minutes, I need a rest.

The laurel hedge provides a good screen from the path by the windmill, but it is hard work!