Hi Tony
Thanks for you reply. Believe it or not I did experiment with alternatives to boots and that is what I found. Scientific evidence is simple physics, how many times and how high you lift your foot by the factor of footwear weight and surprise surprise you use more energy

Does this mean tiredness? Well I am not going to surgically trim my feet down to say size eight from size twelve so my guess is I am use to the weight. Remember the post is about my experience, I am not trying to convert the world to any idea of what I think is perfect

Honestly I am happy in any decent footwear and can see no merit of saving weight to trade off protection. I regularly walked forty kilometres a day when backpacking around in Europe and never once did I say, "oh better wear my light weight shoes today". I used to alternate my footwear and only wore my shoes in preference to boots when "That looks like a nice place better drag out my best casual dress gear". Four month experience so from my perspective the "heavy tiring boot" argument is hogwash.
Twisted ankles is more common in boots than shoes

Tony with a high cut boot I have never torn or twisted an ankle. Shoes I have, and extremely badly twice. Based on a sample size of one big person I hold such research as in the same light as bleeding a patient.
Tony I made it clear this was my experience and surprising as it seams I hold that if you are built like the proverbial brick outhouse maybe boots make sense for bushwalking. I twisted an ankle in low cut footwear and hobble back and then went out the next day in high cut boots and got to my destination and back, I then took my boots off and went for shoes and hobbled to the toilet and back so badly that my friend offer to come to my aid. I have seen someone else take a tumble and then walk out, I am sure without boots it would have been a job for the big yellow taxi.
I have no problem with people wearing what they want to but for me not wearing boots is asking for serious trouble. Come to think of it I see a lot of ice skating boots, ski boots, etc but have not spotted shoes

Maybe I am not looking hard enough. Then again we will never agree on light weight walking poles either
Cheers Brett
"lt only took six years. From now on, l´ll write two letters a week instead of one."
(Shawshank Redemption)