To Reach This Startling Conclusion, A University Study Was Needed.

"Could be"?

That anyone is so clueless as to not understand that playing with their cell phone at the gym totally defeats the purpose of their being there in the first place is stupid enough, but Men's Journal, clearly conflicted on this issue, thought it necessary to reference a Kent University study carried out to determine if this might indeed be the case.

Apparently the obviousness of gym cellphone obsession diminishing muscle-building results had so eluded a significant percentage of the population that a major university was compelled to devote time and money to reach this conclusion.

https://www.mensjournal.com/health-fitness/heres-how-your-phone-could-be-ruining-your-workout/