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SlightlyStoopkid t1_j29zgb6 wrote

My friend was a high school state champ and penn state wrestler. He went to one spin class with his gf and didn’t know you could adjust the resistance, so he just did the whole hour on max resistance without realizing. He gave himself rhabdo and had to spend several days in the hospital. The moral is, any workout can be as hard as you want it to be.

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