Looks like it's time for some "deloading"....
For the most part, lifting heavy is the way to go. Most people don't challenge themselves enough in the weight room and consequently, don't see the results they are looking for.
The body responds best to change and variations in lifting routines. Regular changes in weight, volume, exercise order and muscle groups worked is the most effective way to achieve your desired physique.
However, it is also extremely important to have hard weeks and easier weeks. The easier weeks are called Deloading. Deloading is when you decrease weight and increase reps approximately every 4 weeks in your lifting program, for one week. Or when your body tells you it's time to take it easy.
Deloading is important because:
-The muscles need to break without having to take too much time off. You already have your rest days in between workouts. Deloading is a way to re-charge without having to take whole weeks off entirely.
-Heavy lifting for an extended period of time can overload the nervous system.
-Change and variety ensures success. Don't think of deloading as retrogressive. Think of it as a change in routine
-Prevents over training and mental burnout
-Prevents over training injuries
-Increases motivation. Doing the same type of routine gets kinda stale!