as this information is relavent so i am sharing it with u ppl but i dont have any authentic proof or source
once a doctor was discussing that to do SAJJDA a bit long are really helpful for hair fall problem which is being faced by almost 70% population of Punjab.
now the scientific logic is that during SAJJDA position BLOOD CIRCULATION increases towards haed region which helps to privide nourishment to hairs and also help in re growth of hairs.