You’ve heard the old adage “practice makes perfect.”
And you’ve probably heard the saying “perfect practice makes perfect.”
That’s all fine and dandy, but both imply that motor learning occurs only during practice. That how we practice – our practice strategies, methods, and techniques – are the primary determinant of how quickly we improve.
Those things do matter greatly, of course.
But it turns out that there are other factors that contribute to motor learning too (wait…what?!).
For instance, researchers have found that learning actually continues for at least 24 hours after you have stopped practicing. In fact, a number of studies have found significant gains in performance 24 hours later – even with no further practice.
Hmm…how can this be? And what are the implications? Is this something we can optimize – is there something we can do to maximize the learning that takes place after we leave the practice room?
Let’s take a look.
A 20.5% improvement in 12 hours
So how is it that we continue to improve even when we’re not practicing? Do things simply settle in with time? Or does sleep have something to do with it?
A team of neurophysiologists at Harvard conducted a study to see if they could answer this question.
They trained 62 participants in a finger tapping task. Each participant received 12 30-second training trials, and then were tested to see how effectively (based on speed and accuracy) they could reproduce this sequence.
Group A received their training at 10am, and were re-tested every 4 hours (at 2pm, 6pm, and 10pm). There was no meaningful change to speak of. Basically just some minor improvement likely resulting from the continued repetitions at each re-test.
Group B was also trained at 10am, and tested 12 hours later at 10pm, and again at 10am the next day. They showed a non-significant 3.9% improvement in performance when tested at 10pm. But when tested at 10am after a night of sleep, they demonstrated an 18.9% improvement relative to their scores 24 hours prior (with no decrease in accuracy), and 14.4% relative to their scores the night before.
To make sure it was actually the sleep that contributed to this improvement in scores, and not simply the extra time, another group was trained and tested at 10pm, then 10am, and 10pm the following day. These participants demonstrated a 20.5% improvement from 10pm to 10am. And only a 2% improvement from 10am to 10pm.
So it’s not just the passage of time, but actual sleep, that seems to have an impact on the learning of motor skills.
Of course, this is just a study of a bunch of college kids learning some contrived motor skill task in a lab. Is this really applicable to musicians?
Sleep = fewer mistakes
Amy Simmons and Robert Duke (learn more about Dr. Duke via this violinist.com article) conducted a study of 75 music majors at the University of Texas – Austin, all with 2 years of experience in piano class.
Each learned to play a tricky 12-note melody, and were instructed to play the melody as “quickly and accurately” as possible, using the fingerings specified in the music.
Like the Harvard study, there were multiple groups, some which were tested after periods of sleep, and others which were tested without sleeping in between.
The results were consistent with the other research in this area – and a little more illustrative of how this relates to musicians.
Unlike the Harvard study, where gains were made primarily in speed, accuracy was the factor that improved most in the musician study.
Participants made fewer errors when tested after having had a period of sleep between tests. And no, they didn’t just play slower in order to make fewer mistakes.
Why didn’t speed improve?
The researchers noted that participants appeared to find a particular tempo that made sense to them given the particular way in which the melody was written, and didn’t seem that intent on playing the passage above that tempo – even when accuracy no longer seemed to be an issue.
Makes sense, right? As music majors, they all probably had a pretty good sense of what the “right” tempo for a particular passage ought to be.
How much sleep is enough?
So how much sleep do we need to see benefits?
A recent study by researchers at Brown gives us some clues.
They set out to identify what exactly happens in the brain during sleep that contributes to this performance improvement.
One group of participants were trained in a finger tapping task (somewhat akin to typing or playing a keyboard). Then they were allowed to sleep for 3 hours, at which point researchers woke them up.
An hour later, they were tested on the tapping task.
A control group did not get to sleep after learning the task, but were simply tested 4 hours after the training.
As in the other studies, those who slept performed the task faster and more accurately.
There are several cool things about the study, but two takeaways are:
- Three hours seems to be enough to observe the beneficial effect of sleep on motor skill improvement. Might more than 3 hours be more helpful? It’s not certain what the optimal “dose” of sleep might be.
- However, the researchers were able to identify the exact phase of sleep that seems to be responsible for the associated performance improvements. Namely, deep sleep. That’s the phase of sleep when you’re totally zonked out and it’s really difficult to wake you up (and is, interestingly, the phase when sleepwalking occurs). It takes some time to get into deep sleep, so a quick 20 minute nap is probably not long enough to produce these performance improvements.
So is the big takeaway that we should sleep? But…how is that helpful? We’re all going to sleep eventually.
Here’s one way we might be able to apply these findings.
A student recently told me a story about a time when he had only 7 days left to prepare for a concert, and was getting really stressed out about it until he realized he could turn 7 days into 14 days.
He practiced in the morning for 3 hours. Slept for 3 hours. Then did 3 more hours of practicing later in the day. In essence, turning each day into two days.
He was half-joking when he said this, but given the research above, perhaps there’s something to this strategy after all!