Thanks for the question Kim. There really often is a tradeoff between form (i.e. technique) and intensity of the exercise. And you are right: When you sacrifice the form, then the injury risk is higher. Besides the fact that it takes longer, I don’t see any great disadvantage of “slower training”, as you say. But if the time you spend on the exercises is a big factor for you, I suggest that you try high intensity using “easy” movements (so that the form is not a factor at all). Maybe this example can help?