Average adult male weakling from the mother-world: can bench (larsen press style, so no arch and no leg drive) a pathetic 300kg/661lbs without ever training.
Average adult male from our world: can probably bench their own bodyweight after 2-3 months of training and will probably peak at a lifetime limit of 180kg/397lbs after decades of training if they started young enough.
The strongest humans ever recorded on this planet are as strong as the weakest people from the mother-world.
In this setting a few people are sometimes randomly spawned from our world to another universe in the ''mother-world'' this planet is harsher and everyone living here is already adapted with immense natural inborn strength, speed, agility, power, coordination, stability, balance, flexibility and as intelligent as modern humans from our world, yet they are technologically developed in different ways. They don't have smartphones but have brain implants or other body augmentations.
I need a way to make those modern humans survive in this new world, are there real world examples where slight similarities can be found and applied to this?