Specifically when I am doing dumbbell deadlifts and dumbbell squats, I have a feeling that I may not be doing the exercises correctly or may even be doing them in a harmful manner.
I've watched youtube videos to get instruction, but am still somewhat unsure.
For example when doing my dumbbell deadlifts, I keep my legs straight but feel that perhaps my back and/or legs bend more than they should, when I should probably be keeping my back straight.
Likewise when trying to do dumbbell squats I think my arms flex more than they perhaps should.
How can I make sure I am doing the exercises in a way that I am getting a benefit and not harming myself?