Surfing For To Lift Definition?

Steven asks…Can i tone my muscles by just picking up any random light weight and lifting til i feel the burn?I wanna build deffinition but i dont wanna keep track of my weight, in fact i wanna lift 10 pound dumbells like 30 or 40 times for each muscle group or 20 pounds 25 times or even 2 pounds hundred times, can i build deffinition this way without keeping track?Nancy answers:Ok anything past 15 reps you are training mostly for endurance. Between 10-15 reps is mostly for definition but if

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