This is the easiest way to get the Tennis racket and the Pedometer in The Forest, 6 cannibals, one Armsy and a Virgina to kill.
(I brightened up the footage in editing so you could see it better)
The Forest Climbing Axe: https://www.youtube.com/watch?v=UAzlxsw3Dno&ab_channel=OpiWaran
Cave location on the map: https://theforestmap.com/#497.1,-649.0