Never understood that comment. Sure you can over train - stressing your body to the point it decompensates. It's even measurable by the amount of cortisol your body produces.
Are you a professional athlete? No...you will never overtrain...that terrible feeling you have when you work out too much is 2 things:
1) your mind
2) you are in terrible fucking shape and justify it by saying it’s overtraining
I took two months off of work about 2 years ago and everyday I woke up and ran 10 miles...then worked out modified Sheiko(with daily accessories), then road my bike almost 30’miles every day!
This was every day for 2 months...never hit overtraining..never had any of this other bullshit that lazy people claim. I walked out of that 2 months learning a lot and in the best natural shape I’ve ever been in.
The only machines I used were reverse hyper, and tricep rope push downs...everything else was free weights.
I also alternated the workout every week. If I did flat bench this day, I would do incline the next day..conventional squats today, box squats the next time...
People are just lazy, out of shape, and refuse to adhere to proper nutrition.
Bench