alt Hacker News> "but hiit also causes a lot of damage in a lot of ways"
Please do explain this.
Technically weight lifting (muscle hypertrophy) also causes "damage" but in a controlled an beneficial way.
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tdiff • today at 6:17 PM
I would guess they mean hiit can traumatize e.g. joints or cardiovascular system, especially for the elderly.
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I really think you're being pedantic to the point of detriment. Runner's knee is a very well known condition in, wait for it, runners!
https://www.mayoclinic.org/diseases-conditions/patellofemora...