Could it be that you have reached your body plateau, which is sometimes sort of maximum limit to how much change your body can undergo at this particular time?
I decided to purchase a couple of Crazy Bulk Products, D-Bal especially and I left with a pocket full of hopes.
I carefully read the instructions on how to use the drug and I followed it to the letter. I took it and then I started working out and you won't believe how amazing the results were. It was like I grew so much muscle overnight and now, my friends call me the hulk, I used to be as thin and skinny as a broomstick.
Another way of getting part this plateau is ensuring you push yourself to the limit at all times.
Usually, lifting a particular weight sometimes when done over time gets easier, keeping your workout limited to 10 reps of 60kg is never going to show the best results you should expect. Always ensure you get dynamic with your weights and once you get comfortable, increase it.
You should always be barely able to get past the last 2 or 3 reps of whatever you choose to lift at any point in time.