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what is the best workout routine for building muscle and strength?

I am currently 17 years old, weighs between 150 and 155 lbs, standing at 5’8 to 5’10”. The number of days I usually work out would be at least four to five days.

well…start out by lifting weights.
for building muscle tone, its a lot better to do a smaller number of repititions with a heavier weight.
running will help in the legs. i personally run 3 miles a day, but to start u should try to do a mile. also..sprints up a hill.
:)