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Tag Archive: statistics

  1. Two good books for the sports scientist/ sports coach/ interested reader.

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    No dung

    Good books about sports science and statistics are as rare as rocking horse dung. I have read two, back to back, that were both readable and informative: ‘Everest’ by Harriet Tuckey and ‘How to Read Numbers’ by Tom Chivers and David Chivers.

    One of the problems with sports science is that it has disappeared down a cul-de-sac of its own making whereby a combination of desperation to ‘Publish or Perish’ and bad writing makes relevant and accessible information beyond the reach of the people who need it the most: the sports coach.

    This results in thousands of research papers being unread and coaches abdicating any form of ‘fitness -training’ to a crew of eager but inexperienced undergraduates who lack ‘context.’ This might involve fitness testing players and disappearing with the results or inflicting gym training sessions that are easy to measure but have little to no transfer to the competitive arena.

    I am talking about the 95% of the sporting world, not the rarefied atmosphere of Olympic and top-flight professional sport. Both of the books that I have summarised below offer insights into how communication and understanding can be improved between coaches, athletes and support staff.

    Everest: The First Ascent by Harriet Tuckey

    Fascinating and well written

    I can’t remember who recommended this to me but I am glad that I made a note of it. It is the detailed account of the work done by Griffith Pugh, a Royal Army Medical Corps (RAMC) Doctor turned physiologist.

     The headline is his work supporting and leading the first successful climb of Mount Everest in 1953. I have no interest in mountaineering as a sport but found this fascinating. The author is Pugh’s daughter and she gives a warts and all account of how Pugh was both thorough, insightful and driven, as well as irritable, aloof and absent-minded.

    The book covers part of Pugh’s war efforts helping develop Mountain Warfare equipment and training programmes prior to his Everest expeditions. It then shows how his research helped with:

    • Cold water survival strategies (Royal Air Force).
    • Altitude training and acclimatisation (Mexico Olympics).
    • Heat exhaustion (endurance runners).
    • Hypothermia and exposure (Duke of Edinburgh award scheme).

    All of the above still use protocols developed and suggested by Pugh decades ago,

    Pugh’s work as a researcher (not as an overall human being) should be recognised and posted in mind for all scientists working to support others. Sir Arnold Burgen said of Pugh,

    He has an extraordinary facility for dealing with quite fundamental matters of human physiology in simple terms, applying general physics to them and working them out with little in the way of specialised equipment.’

    This all might sound a bit dry and geeky but Tucker brings the man to life and adds her own personal feelings that shed a spotlight on this ‘restless sharpshooter’.

    Thoroughly entertaining and enlightening.

    How to Read Numbers: A Guide to Stats in the News (and knowing when to trust them) by Tom Chivers & David Chivers.

    Superb examples

    Don’t panic: this is a book of words with just a few numbers. One of the problems with interpreting ‘science’ is understanding how statistics work. The COVID Pandemic has resulted in a deluge of numbers that threaten to drown us: we either sink or swim to safer, more familiar, shores and allow others to give us a summary.

      This is partly due to bad writing and partly due to deliberate ‘massaging’ of the stats to suit a pre-determined narrative. I have got an ‘O’ level in Stats, did Stats in ‘A’-level maths and did a module on research methods (taught atrociously) in my MSc. I still find it hard to understand what is being written.

    In 22 succinct chapters, the authors summarise, explain and illustrate the most common statistical methods and flaws that we are likely to encounter. It is eminently readable and enjoyable. It is a classic example of true experts understanding that, ‘You haven’t taught until they have learned.’

    I learned a lot.

    I couldn’t put the book down (a sentence I never thought that I would apply to a stats guide).

    One chapter covers ‘Goodhart’s law’; ‘When a measure becomes a target, it ceases to be a good measure.’

    I have seen countless physical measures become targets for poor athletes suffering at the hands of an ‘S&C coach’ or researcher. Often done without the sports coach intervening because they have been bamboozled by numbers and pseudoscience.

    Sports coaches: do yourself a favour and buy a copy (or borrow from the library) of this book and start questioning the methods used by support staff.

    When reading about (or reporting on) targets, metrics and statistics, remember that they’re proxies for the thing we care about, not the thing itself.

    British Fencing once told all its fencers that in order to represent GB they would have to be able to do a side plank for 90 seconds! An example of a measure becoming a target!

    Years ago, I saw Jack Blatherwick tear apart the research papers linking weight lifting to 10m sprint performance. The researchers had amalgamated different gender/ age groups and drawn a regression line through the data. They had eliminated the confounding variables that might also affect sprint performance: men run faster than women and adults run faster than teenagers (on average).

    Thanks to this book, I can now see what was happening and draw a critical eye on research papers (Dr Robin Williams wrote about dodgy sports science stats ).

    I have added this book to my ‘Recommended reading for teachers and coaches’ list. It is a worthwhile investment to help you get a better understanding of how important numbers are in our everyday lives.

  2. Spreading the joy of movement: Willand School and Kelvin Giles

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    “We spend the first two years of their life trying to get them to move and say Dada, then spend the next 16 years telling them to sit down and shut up.”

    Kelvin GilesKelvin Giles gave a great 2 hour presentation to the staff at Willand School last Friday as part of their back to school training.

    He explained the benefits of moving well and moving regularly, and got the staff to take part.

    Primary school teachers are in the fortunate (or unfortunate) position of having to be “Jack of all trades“. Whilst some may have a “sporty background”, others are artists, linguists or scientists. This was an opportunity to show how physical activity can aid learning and give the teachers some practical ideas on how to implement it.

    As Kelvin said, p.e is the first subject to be cut when the gymnasium has to be used for exams, nativity play practice or if the kids go to the zoo for the day!

    Benefits of physical activity in schools

    Kelvin broke this down into 3 areas, and related everything to the classroom and school environments.

    1. Physical: muscular -skeletal (posture, work place absenteeism), neuro-muscular (brain and body connection), metabolism (work capacity, how you cope with daily life).
    2. Cognitive: How they learn to move, how they acquire skill, how they apply skill.
    3. Psychosocial: behaviour, perseverance, discipline.

    (Interestingly, the session before Kelvin was by a cursive handwriting expert who extolled the virtues of physical co-ordination tasks to help handwriting. They also recommended an inclined desk to write properly,which also helps improve posture, something I have been telling the school about for a year!)

    Explicit vs Implicit Learning

    Willand schoolI have seen Kelvin present a few times before, and talked quite a bit with him. This was the first time I saw him talk about and implement these two different types of coaching cue.

    It was good to see this in action. The first is a set of rules, the second is subconscious learning by experimentation. Kelvin showed an exercise on video, then got the staff to try it out. No winners, no losers: everyone was having a go. Then a few ideas like “eyes shut” or “change arm positions” that enabled the staff to experiment and challenge themselves: again no winners or losers.

    The staff through themselves into the session, and it was difficult to get them to stop having fun! It was great to see how engaged the staff were. I hope this passes down to the children at the school.

    This was part of Willand School’s 3 part approach to developing p,e this year. Head Teacher Anne Hawkins has put time and energy into developing this and my aim is to help support her in this work. It will benefit not only my kids, but all of those who attend the school.

    Thanks again to Kelvin for delivering. Really looking forward to the full day next week in Exeter.

  3. 10 things Sports Science has taught us in the last decade

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    “Accurate observations of human nature hold true no matter their age.”

    Tom Kurz (in his guest blog about coach observation).

    I am of the view that pseudoscience is only repeating what we already know or suspect. However, conscious that I may be a luddite, I asked Matt Brookland to come up with 10 things it has taught us in the last decade:

    galen greek physicianSports science or should I say the science behind physical exercise can trace its origins to ancient Greece, where the physician Galen (131–201) wrote 87 detailed essays about improving health (proper nutrition), aerobic fitness, and strengthening muscles.

    Although it has been around for hundreds if not thousands of years, it has really only taken off recently.

    With regards to the question, it is an interesting one and therefore I should define exactly what I mean by the following comments. It is the facts and interventions that have improved the performance of athletes, be it technological or performance that I am detailing below:

    Altitude training doesn’t work
    Physical de-conditioning can occur and sometimes adaptations can take months to take effect. It is actually better to live at altitude and train at sea level.

    Practical application by professional organisations
    Sports Science is not thought of as a fad, there are real facts to back up what is being said. People do not now just listen to their body; they listen to hard quantitative facts as well.

    You can now tell when a player is more likely to get injured
    Jack Wilshere having played so many games during the 2010-2011 season that he could not attend the under 21 European championships.

    Dynamic stretching before an event instead of static stretching
    It has been shown to reduce power output in some studies although static stretching should still be carried out to increase flexibility.

    Use of inertial sensors to determine human movement
    Instead of using cameras or researchers to look and analyse movements, these sensors can give measurements from inside joints for example.

    Video/ computer analysis
    To see exactly where players move during performance and the use of statistics of opponents that were not available before. This technology can track individual players throughout an entire match.

    Eye vision technology
    Athletes can now see exactly where they are looking. Research has also shown that teaching someone where to look and knowing where to look during certain competitions can determine the difference between experts and novices, this is prevalent within golf putting.

    Gold standards for testing
    British Association of Sport and Exercise Sciences (BASES) has determined certain tests and brackets for certain levels of performance.

    Kinesiology tape to stabilize muscles and joints
    Although tape has been around for decades, this new technique of stabilizing and pain relief is quite new, with some high profile users being noticeable for its use.

    10 3D tracking of a ball during play
    Very apt as Wimbledon is taking place, but having the ability track a ball once hit by either a racket or a bat has enabled us to know exactly where it would land or end up. Hawk eye is in constant use in both tennis and cricket.

    There are some very interesting facts detailed above, whereas others may just be slightly common sense. Over the last decade sports science has given us both technical and performance innovation.

    Improving equipment, analysis as well as understanding for coaches alike has created this. I do wonder what this fast paced industry sector will enable us to talk about in another ten years?

    I have included the references below and so you can do a little more in depth reading. Please feel free to comment.

    References

    1.   http://physiotherapy.curtin.edu.au/resources/educational- resources/exphys/00/altitude.cfm.
    2.  http://news.bbc.co.uk/sport1/hi/football/13653177.stm
    3. Yamaguchi, T., Ishii, K. Effects of static stretching for 30 seconds and dynamic stretching on leg extension power. J. Strength Cond. Res. Aug; 19(3):677-83. 2005 3
    4.  http://www.mdpi.com/1424-8220/10/12/11556/pdf
    5.  http://www.prozonesports.com/index.html
    6. http://thedanplan.com
    7.   http://www.bases.org.uk/About
    8.  http://www.hawkeyeinnovations.co.uk/