Should you fully reset between each deadlift rep?
A deadlift is lifting a barbell from a dead position so it makes sense to fully reset between each rep.
Aside from this strict definition, resetting has 2 main benefits:
EFFICIENCY
If the goal is to build strength and muscle, then you should ensure each rep maximises the muscles worked.
Resetting each deadlift rep removes the aid of momentum (or bouncing) at arguably the hardest part of the lift. This makes a difference when your deadlifts get heavier where the initial drive off the ground is key.
If you don’t reset, your progress to heavier deadlifts will take longer as you haven’t efficiently worked that initial movement enough.
SAFETY
Deadlifts get a bad rap because many get injured performing the movement. The cause of injury isn’t the deadlift itself but poor form/technique.
When you don’t reset, and your first rep was performed with poorly, you carry those mistakes throughout the set. This exacerbates your risk of injury.
Resetting allows you to do just that - reset.
It is a more mindful approach to the lift because if forces you to think before each rep. How did I move? Did I brace properly? Was my posterior chain engaged? How was my grip?
So if you want to progress safely to heavier deadlifts, it will be better to reset between reps. It promotes the mind muscle connection which translates to all other work in the gym.
Do justice to the deadlift name. Reset!