The best way to achieve muscular growth and strength is to change up your workout often and constantly attack muscle groups from different angles.Chauncey Graham, an ISSA certified personal trainer suggests, doing a variety of different lifts for each muscle group and changing routines each week will promote growth. "Hitting the muscle from different vantage points will increase definition. The solution to achieving muscular growth and strength is to incorporate as many motor units possible in a periodized workout routine which consists of many different lifts for each muscle group," Graham advises.
In simpler terms, do not do the same thing all the time, change your sets, repetitions, and the duration to achieve your fitness goals!