For anyone that has worked/works at a warehouse: How did it affect your physical fitness and health?

Might end up working in a warehouse for a grocery store in the near future and am wondering how it could affect me physically.

I’m a relatively healthy and fit 19 Yr old male who has been lifting regularly for about 2 years. How would working in a warehouse 10-12 hours a day 4 days a week impact my aerobic and anaerobic fitness for lifting or long distance running?

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