Do you consider 4.5 as an elite speed and something that is impossible to reach? I dont know why you keep bringing 4.3 in the discussion because the only thing i said is he could get down to 4.5 with hard work and that isnt something way out of reach. Also if you check most of the guys that ran the 40 in 4.3 they worked hard to get to that point and they probably started with a 4.4.
Also you didnt answer the powerlifter vs sprinters questions. Try to answer this: Why do the elite sprinters follow a training routine if the elite speed is genetic and like you said it doesnt require that much technique. Do you think they go to the olympics unprepared and simply run with their natural talent?
Bolt wasn't the fastest runner since day 1 by the way. I think reading his biography will enlighten you. At 20 years old he ran the 200m in 19.88 seconds. At 23 years old he ran it in 19.19 seconds. How did he manage to cut down .69 of his time? Did he sit on his couch and said : ''Oh i'm an elite runner already. I dont need to practice and i'll beat my personnal record at the olympics.''
As for his 100m race. His first personnal best time was 10.03 . Now his personnal best dropped to 9.58 . Please explain to me how he did that since you seem to know so much and tell me that training for speed and technique has nothing to do with it. His elite genetics didnt simply improve from 20 to 23 years old.
Its true that he had elite genetics but he wasn't the fastest since day 1 and he worked hard to earn his spot. At the time the best runners were Asafa Powell and Tyson Gay and they used to beat Bolt all the time. Now its different. What changed?
legit 4.5 is ridiculously fast. thats aj hawk speed coming at ya. so yea, 4.5 is very, very fast. stop using the fastest people in the world as your example. its ridiculous. you cant use average people as examples because you have none. i get a sense from you that all the times you are talking about are hand held. so if someone tells me they tested 4.6 handheld, thats more than likely 4.75 or 4.8 in reality.
since your handle is nbafan, i have a 6'8" power forward and a 6'0" power forward. the six footer trains the hardest and practices the most but the 6'8" guy is just better. why? cause hes 8 inches taller and i cant teach the hard worker how to get 8 inches taller. that is speed. its the same thing.
why did bolt get faster? because he matured into his body and his true potential was realized. not because some coaches made him spread his fingers and keep his 45 degree angle. and seriously stop using world class athletes as your examples. you go from trying to use a strength coach as your crutch to olympic athletes. know any high school or college guys who have proven numbers? i do. and i didnt see anyone walk on water like you claim happens twice a day and three times on runner wednesday.