Thankfully, with building speed on guitar, we don’t need the same kind of rest in between practice sessions. You don’t tear down a lot of muscle the same way with big compound lifts. Although you are certainly using muscle to play fast, and need to build some muscle up to a certain degree, guitar playing is mostly nervous system related. And, because you’re not destroying your nervous system the same you do with a one rep max, you recover MUCH faster with shred guitar practice, and can do a lot more of it vs weight training.
That was a really great explanation. Now, as far as developing a practice plan…
As I’ve learned with lifting weights to build muscle and strength, KEEP IT SIMPLE!!! Seriously, you can easily over complicate things. My progress in the gym sucked for many years because I tried to emulate what the professionals did. Well, I don’t have their genetics, years of experience, or the performance enhancing drugs.
Same thing with improving guitar speed, it’s important to keep things simple. And, in regards to building motor skills and mechanics vs speed, that’s where the beauty of metronome practice helps you get both at the same time.
So, let’s say you want to play a scale up and down really fast. Nothing fancy, just up and down. Here’s a simple way you can approach this:
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First, just learn the scale. Don’t worry about playing it fast, just memorize the notes. Make sure you’re picking it the way you intended (e.g. alternate picking or economy picking).
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Next, let’s play it safe and only play 2 notes per beat (8th notes) with your metronome. Playing with the metronome will help give you structure and improved timing/rhythm. Start your metronome at 60 BPM. Play your scale. After playing the scale correctly (no mistakes!) then bump up the metronome by NO MORE than 5 BPM. Play the scale again. As soon as you do it with no mistakes, bump up the metronome. Keep doing this until you can’t get any faster. If you keep making mistakes and can’t play with accuracy anymore, that means you can’t play any faster.
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Once you get your scale up to 240 BPM you can now practice with a higher subdivision. If you are practicing a 3 note per string scale, then triplets may be a good choice. Perhaps 16th notes would make more sense, depending on the scale shape you used. I use 240 BPM as a bench mark for myself and my students. If you can’t play something at 240 BPM with 8th notes then you need more work with the slower speeds before moving on to 16th notes. This is how metronome practice works on both mechanics AND speed. You play tons of repetitions while you slowly increase the metronome. This is how I developed my technique and speed.
How many times a day should you do this? One is fine. I’d say three is the most. For example, if you choose to do three sets, you start at 60 BPM, max out on your speed, take a couple minutes for rest, then start back at 60 BPM and climb back up. Repeat again for the 3rd set.
COULD you do more sets? Yes, but you have a higher risk of feeling burnt out and having diminished returns.
How many days should you keep doing the scale? Depends. If you have a speed goal, you can keep attacking the scale until you hit your goal. But, if it takes you more than a week or two, it may be time to move on to something else to shake things up. You may just be too slow and inexperienced to reach a speed goal within a week. For example, if you can’t play 16th notes at 100 BPM today, then trying to reach a speed goal of 200 BPM with 16th notes in a week is being unrealistic. It’s probably not going to happen, and that’s totally fine.
I do find it helpful to track your speed for any given exercise you’re doing so you can see that you’re making progress. Just like weight training Also, if you are NOT making progress, or are going backwards, this gives you the opportunity to make adjustments needed to help you go forward.
This method I laid out is definitely simplified, it’s how I approach my own stuff, and what I have my students do.
Boy, that was a LONG reply. Hope it all made sense!