Dumbbell shrugs are an exercise that targets the trapezius muscles in the shoulders.
The author did 50 dumbbell shrugs a day for a week to see how it would affect their shoulder muscles.
After the first day, the author experienced soreness in their shoulders.
By the end of the week, the author noticed an increase in shoulder muscle definition.
The author also felt stronger and more confident in their ability to perform other exercises.
However, the author notes that doing 50 dumbbell shrugs a day may not be sustainable for everyone and recommends starting with a lower number of reps.
Overall, the author found that doing 50 dumbbell shrugs a day for a week had a positive impact on their shoulder muscles.