Tagged: Science

How to forget what you read

This article was captured from the You Are Here audio collection by Oliver Burkeman in the Waking Up app.

Oliver Burkeman is the author of The New York Times bestseller Four Thousand Weeks: Time Management for Mortals, about embracing limitation and finally getting around to what counts. For many years, he wrote a popular column on psychology for The Guardian, “This Column Will Change Your Life,” and has reported from London, New York, and Washington, DC.

These days, in the world of productivity and personal development, you can barely move without bumping into someone offering advice on how to remember everything that you read. All these people, to be believed, suggest lots of us are yearning to discover the perfect technique for capturing all the information that we encounter in books, online, and elsewhere—plus all the ideas that pop up into our heads while we’re taking a shower or riding the subway. And then storing all of that in the ideal note-taking system. This is the increasingly fashionable field that goes by the name of “personal knowledge management.”

I want to be honest and say that while I’m going to criticize it a bit here, I do that as someone who is a huge sucker for note-taking apps and digital systems that promise to store all my information so I can call it up whenever I need to, helping me see unexpected connections within it that I wouldn’t otherwise have noticed. My own history as a productivity junkie is littered with the wreckage of all the short-lived systems that I tried to implement in order to conquer the challenge of getting a handle on all the information I consume. I’ve lost track of the times I would resolve, say, to read for at least 30 minutes every day and then spend another 30 minutes taking notes on my reading, apparently oblivious to the fact that this would require me to locate an additional 60 minutes in an already overcrowded day—which meant it never actually happened.

So many of us try to retain and remember everything we read, listen to, or watch. It’s a very understandable response to the information environment in which we find ourselves. After all, there’s just so much useful and interesting stuff out there and so little time to consume it. And I think a lot of us do feel a kind of pressure to take ownership of what we manage to read, watch, or hear, either by literally memorizing it or, perhaps more realistically, by storing it in some well-organized external system. Otherwise, wasn’t reading it in the first place a waste of our precious time?

I’m increasingly convinced that a much more relaxed approach to knowledge consumption and note-taking is not only more enjoyable but actually more useful, too, in terms of using the information you encounter to help you in your quest to become more creative or more professionally successful. There are three basic reasons I think we shouldn’t struggle so hard to retain everything we read.

The first reason is that forgetting is a filter. That is, when something you read resonates with you sufficiently to recall it without effort, that means something. It means that it connects with your existing ideas and experiences in some relevant way. If you forget it, on the other hand, that’s fairly likely to be because it wasn’t worth remembering. And if you replace this natural filtering process with a more conscious, willpower-based system for retaining information by packing it all into a notebook or app, you risk losing the benefits of that filter. As the writer Sasha Chapin put it, “Your natural salience filter is a great determinant of what’s most alive for you. If you begin to rely on any other filter, you will increasingly record what seems like it should be interesting according to some pre-existing criteria, rather than what organically sticks to your mind.”

The second reason—and this is a universal law of personal productivity, really—is that the more effort a technique requires, the more likely you are to avoid doing it. If your system requires you to take detailed notes on everything you read, then you probably won’t. If you’re like me, that doesn’t mean that you’ll pick up an important book but fail to take notes on it. It means you’ll avoid that important book altogether in favor of something that matters to you less, because you tell yourself you’re going to keep the book for some other time when you’re feeling more energetic or engaged. Or maybe you’ll end up listening to a podcast that you don’t especially want to hear because you’re too tired to make notes on the podcast that you really do want to hear and now probably never will. It’s very similar to working out: the best kind of exercise is the one you’re actually going to do, and the best way to explore the vast array of information in the world is whatever is going to mean you actually do it.

The final reason to be wary of these attempts to store knowledge and information for future use is that the point of reading, at least most of the time, isn’t to vacuum up information but rather to shape your sensibility. As the art consultant Carina Janova has written, each work that you encounter changes you at least a little and changes the way you see the world. And that change is going to occur (or not) regardless of how much of any given book’s contents you happen to intentionally retain in your memory. And after all, it’s the way you see the world—your unique angle applied to the people and events and things around you—that’s going to result in the best ideas and the most original work.

This doesn’t mean I think you should throw away your notebooks or delete your note-taking apps and just give up on the idea of retaining knowledge and information that you encounter. Plus, of course, there may be a few contexts—say, if you’re studying law or studying medicine—where you really do have to memorize a lot of facts. But what I want to argue is that most of us could benefit from chilling out significantly when it comes to how we think about reading and learning and recording our thoughts.

First, embrace low-overhead ways of reading and note-making. It’s often drummed into us at high school or at university that merely highlighting a passage from a book or underlining it in pencil isn’t a very good way to internalize what you’re reading. Okay, maybe that’s true, but you know what’s an even worse way of internalizing what you read? Never even reading it to begin with because you couldn’t face taking detailed notes on it. So the method that you actually put into practice—be it highlighting or underlining—that makes it a good method.

Secondly, I think you should feel free to copy down quotes verbatim whenever you feel like it. There’s another dogma in the world of education that if you don’t transform things into your own words, then it doesn’t really count. You haven’t really engaged with the text. But at the risk of repeating myself, that means you don’t read the text at all in the midst of an otherwise busy and tiring and distracting day. Well, that’s a bad rule. Copying things down verbatim is what all sorts of celebrated writers and scholars have done for centuries in their so-called commonplace books. If that’s good enough for them, I think it can often be good enough for us.

And then thirdly, I would recommend keeping your notes messy. Keep them in a not-too-organized system, as opposed to some complex hierarchical scheme of folders and tags that needs 20 minutes a day just to keep it all in order. So that, once again, you’re more likely to actually do it. But beyond this, and for reasons I still can’t fully explain, I’ve found that keeping my notes messy also keeps them more alive for me, somehow makes them more fertile, more likely to be a source of interesting ideas than if I were to lock them down into a more rigid structure.

In the end, I think I’m getting at something a bit deeper than merely choosing lower-effort approaches to reading so that you actually get around to reading. It’s also a question of what the point of reading is, what the point of encountering new ideas and perspectives really is. Because it’s easy to operate, I think, on the assumption that the main point of picking up a book—certainly a non-fiction book or a work-related book—is to add to your storehouse of data. So you’re hoarding information and insights like a squirrel hoarding nuts, ready for some moment in the future when you’ll finally get to take advantage of it all. And in fact, to approach reading in that way is a recipe for living permanently in the future, mentally speaking, never reaping the value of life here in the present moment.

So instead, it’s better to think of reading not primarily as preparation for living later on, but as one way of engaging with the world, one way of living right here in the present moment. By all means, of course, let your reading shape your thinking over the long haul. Let it generate or improve your ideas for future projects. Let it enhance your skills and your knowledge base. But consider also the possibility that spending half an hour reading or watching or listening to something interesting or moving or inspiring or even just entertaining—that might be something worth doing not only for some other future reason, but for the sake of that very half hour of being alive.

Rugby Science Update 26

The Performance Demands and Technical Determinants for Tackle and Ruck Success During the Pool and Knockout Stages of the Men’s International World Rugby Sevens Series

The purpose of this study was to describe tackle and ruck frequencies across an entire World Sevens Series and specifically compare competition stages (pool vs. knockout stages) and match periods(1st half vs. 2nd half). A secondary aim was to identify tackle determinants associated with tackle performance.

Rugby Sevens is an Olympic sport that has grown rapidly worldwide, both in terms of participation and commercialisation. Understanding the tackle and ruck demands within and between the competition stages may help coaches better prepare for the technical and tactical demands of each stage—both in training and during the transition period between the pool and knockout stages. In addition, understanding which determinants increase the likelihood of tackle and ruck success is needed to develop effective training programmes

Video analysis of all matches during the 2018/2019 International Men’s Rugby Sevens World Series was conducted (n = 449 matches). This equated to 21226 tackle contact events and 6345 rucks events. Each tackle event was further coded for tackle descriptors (type of tackle, direction of contact and point of body contact) and tackle outcomes (successful and unsuccessful).

The study tackle frequencies per match remained consistent across the series and between the different competition stages and match halves. Ruck frequencies on the other hand decreased from the first tournament to latter parts of the series, and fewer rucks were observed in the knockout stage of the tournaments.

Based on these findings, contesting fewer rucks after a tackle may be a tactical consideration from a defensive perspective. With that said, which rucks to contest or not may also play a role, therefore coaches should emphasise better post-tackle decision-making.

In both the pool and knockout stages, the most frequently occurring type of tackle was the arm tackle. In the pool stages, the arm and jersey tackle were also associated with a higher likelihood of tackle success compared to other tackle types. The frequency and higher likelihood of tackle success for arm tackles in Sevens highlights a unique demand of Sevens, which strengthens the argument for Sevens specific tackle training and coaching.

The consistency in tackle characteristics between competition stages and between match halves provides further insights into the unique tackle demands of Sevens, with players requiring robustness to repeatedly perform a range of tackles.

The findings of this study highlight the unique technical-tactical tackle and ruck demands of Sevens, which strengthens the argument for Sevens specific tackle and ruck training and coaching.

This study is published in the European Journal of Sport Science and is Open Access.

de Klerk, F., Jones, B., Maree, W., & Hendricks, S. (2025). The performance demands and technical determinants for tackle and ruck success during the pool and knockout stages of the men’s international world rugby sevens series. European Journal of Sport Science25(3), e12269.

Contextual factors matter: A two-year exploration into the impact of contextual factors on elite women’s rugby sevens match-play movement demands

The aim of this study was to determine the effect of contextual factors on the match-play movement demands of both international and domestic women’s rugby sevens players. Quantifying these demands in an elite dual-level tournament across multiple teams, positions, match types, and over two seasons, will help bridge the gap between international and domestic players and better inform talent identification, training prescription, load monitoring, and match preparation processes.

The study used an observational, longitudinal study design to characterise match-play movement demands in international (n = 23) and domestic (n = 42) players across two seasons and nine series of an elite domestic women’s dual-level rugby sevens tournament. In total, across the 65 players, 1461 matches were analysed. Match-play movement demands were assessed through distance, speed, and acceleration metrics. Contextual factors were grouped into four themes: Player, Match, Tournament, and Environment.

Brosnan and colleagues identified that higher intensity match-play movement demands were associated with day 1 of the tournament, the first half, winning and/or drawing the match, closer score lines, playing a top-5 ranked team, playing against opponents closer in the standings, starting the match, playing as a back or speed edge, being an international player, playing in warmer climates, and playing later in the day.

This study highlights how contextual factors can affect match-play movement demands in women’s rugby sevens. Coaches and performance staff can use these results to tailor training, optimise tactical decisions, and manage player workloads. For example, coaches and performance staff can prepare for faster games played in warmer weather conditions, played later in the day, during first halves, on day 1 of tournaments, played with or against more international level players, for backs and speed edge positions, when starting a game, when playing in a top 5 team, when playing against teams close in the standings, and when playing in a game with a close result. Coaches and performance staff members can also use this information in assisting the monitoring of player loads, individual recovery, and developing more holistic return to play protocols.

This study is published in PLOS One and is Open Access.

Brosnan, R. J., Visentin, D., Watson, G., & Schmidt, M. (2025). Contextual factors matter: A two-year exploration into the impact of contextual factors on elite women’s rugby sevens match-play movement demands. Plos one20(5), e0322407.

Effects of light-load vs. heavy-load jump squats as priming activities in Olympic female rugby sevens players

The aim of this study was to evaluate the effectiveness of two different priming activities involving an exercise commonly used in professional training settings (the jump squat), performed at two distinct loading conditions (40% vs. 80% 1RM) on a series of speed-and power-related capabilities of Olympic female rugby sevens players, assessed at 6 and 24 hours after completing the priming sessions.

“Priming” are training strategies prescribed by practitioners to top-level athletes prior to competition with the intention of enhancing performance.

In a randomised cross-over set one-week apart, twenty Olympic female rugby sevens players performed a jump squat at either 40% or 80% of half-squat 1RM as the priming exercise. Speed-power performance measurements including counter movement jump, sprint speed at 10- and 40-m, 505 change of direction (COD) speed test, and peak velocity (PV) during the jump squat were measurement before the priming, 6 hours after, and 24 hours after.

The study found that heavier loads do not present any advantage over lighter loads for speed- and power-related qualities after 6-h and 24-h. When applied correctly, for example, using light-loads and low sets of ballistics lifts such as jump squats), priming may improve vertical jumping and power-related qualities, as well as improve linear sprinting and change of direction speed.

This study is published in Biology of Sport and is Open Access.

Loturco, I., Zmijewski, P., Mercer, V. P., Ramos, M. S., Betelli, M. T., Arenhart, I., … & Pereira, L. A. (2025). Effects of light-load vs. heavy-load jump squats as priming activities in Olympic female rugby sevens players. Biology of Sport42(2), 85-94.

Rugby Science Update 8

Professional male rugby union players’ perceived psychological recovery and physical regeneration during the off-season

The aim of this study was to explain the phenomenon of psychological recovery and physical regeneration of male professional rugby union players during the off-season. The study used a qualitative approach to gather the beliefs and experiences of players regarding their mental and physical health and well-being across the off-season period and identify the psychological and physical strategies adopted to recover and regenerate in preparation for the upcoming season. The study interviewed 34 male professional players, and found that the off-season is characterised by three phases that players undergo to preserve their mental and physical health and well-being to recover from the previous season and regenerate in preparation for the upcoming season. These include decompression from previous season, cognitive detachment from the rugby environment and preparation for preseason. Successful progression through all three phases appears to be influenced by variables including the work and life demands a player is encountering at the time, contextual factors such as their health status (ie, currently injured or ill), and their level of experience in the sport (eg, previous experiences of the off-season). The authors recommend players should receive sufficient time (5–6 weeks) in the off-season to progress through the phases of recovery and regeneration to prepare for the upcoming season, with consideration for the impact of work and life demands, contextual factors and experience levels. Also, education should be provided to all stakeholders regarding the importance of the off-season period for well-being (recovery and regeneration), together with strategies that can be used to enhance the quality of this process (ie, physically distancing from work environment to support cognitive detachment from rugby, engaging in development activities that nourish holistic identity and personal skill development). Clinicians should also support, where appropriate, player subgroups at risk of threats to well-being and welfare in the off-season period (long term or recently injured and younger professionals).

This is study is published in BMJ Open Sport & Exercise Medicine and is open access. 

Mellalieu, S. D., Sellars, P., Arnold, R., Williams, S., Campo, M., & Lyons, D. (2023). Professional male rugby union players’ perceived psychological recovery and physical regeneration during the off-season. BMJ Open Sport & Exercise Medicine, 9(1), e001361.

Tackling sport-related concussion: effectiveness of lowering the maximum legal height of the tackle in amateur male rugby – a cross-sectional analytical study

The aim of this study was to investigate the effect of a tackle law variation that reduces the maximum legal tackle height from the line of the shoulder of the ball barrier, to the line of the armpit, on injury, head injury and sport-related concussion (SRC) incidence in amateur community rugby union. The study used a cross-sectional analytical design over the period 2018 (control) and 2019 (intervention) in a South African collegiate student rugby competition – which included 42 teams. Reducing the legal tackle height from the line of the shoulder to the armpit of the ball carrier in community amateur rugby showed a trend towards reducing injuries, head injuries and SRC, however, these injury trends were not statistically different.

This study is published in Injury Prevention and is open access.

Van Tonder, R., Starling, L., Surmon, S., Viviers, P., Kraak, W., Boer, P. H., … & Brown, J. C. (2023). Tackling sport-related concussion: effectiveness of lowering the maximum legal height of the tackle in amateur male rugby–a cross-sectional analytical study. Injury prevention, 29(1), 56-61.

Performance indicators associated with match outcome within the United Rugby Championship

This study had 3 aims  i) identify performance indicators associated with match outcomes in the United Rugby Championship (URC), ii) compare efficacy of isolated data and data relative to opposition in predicting match outcome, and iii) investigate whether reduced performance indicator statistical models can reproduce predictive accuracy. The study analysed 27 performance indicators from 96 matches during the 2020-2021 URC season. Five key performances indicators differentiated between winning and losing in the URC –  kicks from hand, metres made, clean breaks, turnovers conceded and scrum penalties. Kicking was highlighted as a key driver for match success, with the probability of winning higher for a team kicking more than their opposition. Also, team performance data are much more efficient at predicting match outcomes when expressed relative to the opposition’s performance.

This study is published in the Journal of Science and Medicine in Sport and is open access. 

Scott, G. A., Bezodis, N., Waldron, M., Bennett, M., Church, S., Kilduff, L. P., & Brown, M. R. (2023). Performance indicators associated with match outcome within the United Rugby Championship. Journal of Science and Medicine in Sport, 26(1), 63-68.