For those with back pain, I recommend the one-leg deadlift instead of insisting on this exercise. Once you get used to the stimulation and balance, try it with dumbbells. The model slightly bends their knees when going down. If the knees are fully straightened, it turns into a good morning exercise, which puts stress on the erector muscles as well. When the hamstrings shorten, they are connected to the posterior chain, which puts strain on the erector muscles and lumbar spine during bending movements, potentially leading to a herniated disc. In that case, it's better to reduce the strain on the back with a one-leg deadlift. This exercise is good, but I recommend learning methods to stimulate the hamstrings and ensuring proper posture before doing it. After all, the stiff deadlift is not a weightlifting exercise, so there's no need to insist on using a barbell.