In 90% of the training you do the emphasis should be on picture-perfect form AND heavy weights. Cheating is undesirable, and while it SEEMS that you are working harder because you are lifting moreyou are, in fact, working less intensively since the “heavier” work is being distributed over many hefty muscle groups – instead of being placed on the ones that you wish to work.
Sometimes – SOMETIMES – a little cheating is okay. But more often than not when the urge comes to really pile on the workload you are better doing partials. This way you will actually be putting forth the work where it is desired, with no outside assistance. Let me show you what I mean by partials.