I was reading about running (!) and embedded in the piece was this Youtube clip of David Attenborough narrating a hunt by the San People of Namibia, described as the last people on earth to live by persistence hunting – where they basically chase an animal until it is exhausted. Obviously the film is highly edited (a whole day down to 7 minutes) and might not be that representative of San People life, but assuming it is, I was struck by the bits of technology they've taken and even more the things they've not taken while apparently not altering their way of life.
Shoes and socks. Obviously useful when spending all day on your feet, and prevent injuries from standing on thorns, scorpions, etc. (But they might have had shoes for thousands of years, made of animal skin or plant materials; so what they've taken is readymade shoes of modern synthetic materials.)
Shorts and belts. Not just clothing but useful for attaching things to. And again presumably easier to swap for some meat than make your own.
Metal for spears and knives. Presuming that "stone age hunting" means they didn't have post-stone age materials anyway, which isn't necessarily true.
Plastic bottles. Presumably lighter and longer-lasting than making them out of animal skins or leaves.
And perhaps more interestingly what they haven't taken:
Guns. Surely a rifle would be the single biggest tool to make hunting for food easier? But they prefer to run. Bullets could easily be obtained by swapping for meat etc, like shoes.
A few half-decent mountain bikes would make the initial tracking, isolating and tiring easier. Probably not so good for the final chase.
A pickup jeep would be useful for taking the dead animal back to the rest of the tribe who don't take part in the hunt. (I wonder if they send a messenger back to wherever they were in the morning to tell everyone where the meat is, or do they cut it up – or drag it whole – back to the camp? After a day's hunt they could be a long way from wherever they started off.) But obviously, even if they could get hold of one, keeping it running would be a huge problem.
Horses might serve the same purpose and be easier to "keep running". Dogs might also help with the hunt. Perhaps they'd eat too much to be worth it? Or be too thirsty in the hot dry climate?
We don't see their homes, or any other aspects of their lives apart from this hunt, but there seem to be quite a lot of things they must have come into contact with that they could use but have decided not to.
https://youtu.be/826HMLoiE_o