Yhdysvaltalaisessa thrash metal -legenda Metallicassa vuosien 1986–2001 ajan soittanut basisti Jason Newsted on paljastanut tuoreessa Palm Beach Florida Weeklyn haastattelussa kärsineensä varsin paljon erilaisista vaivoista, jotka johtuivat moshaamisesta sekä muutenkin aktiivisesta riehumisesta lavalla bändin kanssa. Jason kertoi omista vaivoistaan seuraavaa:
”I haven’t had a direct interaction with anybody other than doctors about that kind of stuff. It’s mostly my family and wife and people who have known me for a long, long time.
”About 1992 in New York, I was in a real bad way. It was about eight or 10 months into a tour, with very little rest. I had herniated these C discs. It was just an occupational hazard. It came with the territory. The reason I said anything about it is because it happened to me. Over time, what happened was they told me I was giving myself whiplash every night. You’re doing it thousands of times a day — how many in a week, in a month? Literally millions of times. It’s flesh and bone, and it breaks down. Now I’ve let myself heal, and I haven’t done it in 19 years.
”When I play in this band (the CHOPHOUSE BAND). I play guitar — lighter instruments and acoustic instruments. It’s not this maple five-string bass that weighs 20 pounds. All that ergonomics is nutty.”
Jasonin mukaan jokainen Metallican kanssa soitettu keikka vastasi raskasta kuntoilua, ja hän pysyikin todella hyvässä kunnossa fyysisesti juuri sen vuoksi, että hikoili keikoilla aina paljon. Jason avasi aihetta seuraavasti ja paljasti parhaimmillaan hikoilleensa jopa puolitoista litraa nestettä keikan tiimellyksessä:
”I stayed the exact same weight for 27 years. We always knew that was going to happen. You can weigh yourself before the show, and it was at least a three-pound difference, sometimes more. We’d rate the power and energy of the show by how many T-shirts we went through. You could wring ’em out and fill up a bottle. Four was a pretty good show. Everybody had their way of keeping fit. I took my bicycle on tour with me for years.”