I have always had a good posture but due to some changes in life I use my body differently at many tines a day and I belive this will change my posture if I do not do regular excersice (my lower back feels tired nowdays)

What advices do you have?

So i thought this fits here, he calls the boat Helios 11 and builds it with very little experience. He docunents the adventure quite well and shares what he learns, and also shares all the plans for the boat for free.