The slovak version of an article contains different photos, and a video [0].
Also, check out the interview with nosič from poland [1] - he mentioned working there 18 years. Surely, surviving this long means that certain techniques are needed ;) When asked about back pain: "My back hurts when I sit at the computer"
[0]: https://regiontatry.sk/moje-tatry/tatranski-nosici-svetovy-u...
[1]: https://magazynnaszczycie.pl/artykul/chleb-uratowal-mi-zycie...