Most professional athletes and recreational gym participant have at one point used deadlift as part of their training programme. This is an excellent exercise as it requires various body parts from head to toe to work in unison to perform the movement.
Looking at the picture of two different lifters at the set-up phase lets quickly analyse the male lifter first: he lacks hip flexibility thus can’t get low enough, his Thoracic spine is kyphosed (rounded) and it is obvious to see that his abdominals are not braced and ready for the lift. Furthermore his shoulder blades are not pulled back to start the movement. He will be prone to injuring his neck, shoulders and lower back.