So since introducing the Rapid Fire Sets I’ve modified the approach in a way that suits my training and has benefitted me quite a bit. I should probably talk about it, and note that what I do now is not really true to the name anymore. I still think Rapid Fire Sets are valuable, but what I do now while similar is rather different.
First of all, this approach is exclusively used with strength machines at the gym, where the weight is set using a metal pin. You could probably use this with a Tonal or similar machine, if you have one.
But I don’t use this approach with free weights of any kind, as switching between them at the gym is too complicated and at times prohibitive. For exercises requiring free weights, I still continue to follow a standard four set block, with the first and last set 12 reps at a light weight, and the 2nd and 3rd middle sets 8 reps at twice the weight.
Given that, here is the (as of now unnamed) approach I follow for any given machine exercise.
- I start with a light weight. On most machines I’ll start at the lightest weight possible. In many cases I’ll start several pounds higher as the lightest weight is so effortless that it’s not an exercise. (As I get stronger I imagine I’ll do the latter with every machine)
- I do 8 reps at that weight.
- I pause/rest 30 seconds, during which I increase the weight by 10-20 pounds, depending on how the weight is divided on the machine. In my case, some stacks are in 10 pound blocks, some are in 20 pound blocks. Whatever the next step up in weight is, that’s what I increase the weight to.
- Then I do 8 reps at the new weight. Then I stop for 30 seconds, and increase again by one step. Repeat.
- Once I’m at a weight that’s too heavy to finish 8 reps, or I finish an 8 rep set and know I probably don’t have enough to do the next weight up… I stop increasing. I rest another 30 seconds.
- I divide the highest weight I lifted in half. I set the pin to that weight. Most machines have some way to let you do half increments, so if the half-weight is not an even number I use that to set the correct weight.
- I then do 12 reps at the half-weight. After that, I am done with this exercise, and move on.
I now do this on machines for all my 20 minute workouts. I still restrict my strength workouts to 20 minutes, and find this way I can do two machine exercises, plus at least one regular 4-set block of a free weight exercise. I don’t always do 2-and-1… I might do all free weight exercises, or just one machine exercise. It depends on what I plan to work on that day.
Sometimes there’s enough time left over to do 2-4 sets of something else, and often I’ll do seated cable rows at a single light weight, hanging raises, or Russian twists, as these exercises work on muscle groups I incidentally want to improve. Which ones I do depends on feel. I’ve also mixed in odd exercises like farmer’s walks or goblet squats.
Since starting this approach I’ve found that if I leave a machine exercise for last, I often run out of time before I reach a weight too heavy to continue. I don’t go over-time: I just end the workout after the last set I’m able to complete before the clock reaches 20:00. So now, if I find maxing out an exercise important, I make sure to not do that one last. And I typically default to the old wisdom of “do the most important thing first”. Likewise, if I want to take it easy on a machine exercise, I’ll often schedule that one last, knowing the clock may run out before I can max it out.
Because I can only do about three exercises per workout, this allows me to spread my full routine across multiple workouts, without burning me out or leaving me too sore to continue in subsequent days. I’ve done a couple of 5-day splits and been able to strength train 4-6 times a week without problems. In the last month or so I’ve done this, I’ve made a ton of progress.
So while I have yet to codify this process (it is a bit complicated to clearly describe for others), I’ve found this progressive approach to strength training effective and repeatable.