In the past, we've mentioned how changing tempo on each set can produce huge growth effect.

For example, if you're using the X-Centric training method, you do your first set X-centric (lift in one second, lower in six), your second in standard style (lift in one second, lower in 3), and your last as a speed set (each rep in 1.5 seconds)… But can you fuse two for a killer double-speed muscle growth combo-to-grow method? Yes…