However, for optimal results, you might want to consider alternating between different rep ranges in order to force different types of muscle cells and fibers to grow. (fitnessandpower.com)
Once in a while, try out different training styles and techniques — experiment with different rep schemes, set structures, lifting speeds, exercise variants. (fitnessandpower.com)
All three times we worked with different reps and all three times we had a grand time. (dealerrater.com)