I dont have regular deadlifts in my beginners program because I feel SLDL are a better exercise for beginners.
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If someone wanted to perform regular deadlifts and asked me, I would ask how much they were deadlifting. If the answer was under 150kg, I would have them do SLDL.
If it was over, 3 x 3 or 5 x 3, but only once a week on a full body workout.
Only a fool would do 5 x 3 with 160kg in the deadlift 3 x week.
Hope this helps