Preserving your Main tight, force by your front heel to face up straight. Retain the weights close to your shins while you pull up. The classic spinal erector exercises are deadlifts and front squats. You can do dumbbell Romanian deadlifts, Which can help. It's also possible to do goblet squats. https://hammerstrengthdumbbellrac91222.blazingblog.com/33299449/the-basic-principles-of-back-exercises-with-dumbbells