Squash Back-Court Defence: Nicole David

May 12, 2017

The problem with most published work on notational or performance analysis of squash is that it is stroke or technique centered.  The simplest example of notational analysis would be when a squash coach charts one of their player’s matches by putting a “W” (for winnner) or “E” (for error) on a diagram of a squash court.

Another example of technique-centered performance analysis was our 1987  Squash Canada Level 4 Performance Analysis Task, where we had to chart a video of a match between Dale Styner and John Fleury (both Canadian National Team members), recording every stroke played and the result of the stroke. The output of the analysis was a summary chart of statistics: number of shots played, percentage of winners and errors for each stroke type (forehand drive, backhand drop, etc.).

Information of this type, without a tactical context is not very useful:  for example a player’s technique, and associated success ratio,  in the back of the squash court is very different depending on the difficulty of the received shot, the amount of pressure the player is under, and the characteristics of the opponent (fast vs. slow, retriever vs. shot-maker, etc.).

The best analyses are based on a defined tactical model in order to be able to make precise, specific recommendations to players concerning the improvement of their game.  When I teach the current Level 4 Performance Analysis Task for Squash Canada, the first assignment in the class is for each of the coaches to present the tactical model they use for coaching their players.

In order to demonstrate the usefulness of notational analysis based on a tactical model, I used the Dartfish Tagging  module to analyze the first 25 points of the first game of the  2006 British Open Final (purchase DVD here) between Nicol David (current World #1) and Rachel Grinham.  In this example I restricted the analysis to the backcourt.

The tactical model I used for the example analysis is the “zone” model I developed with the assistance of Princeton’s Gail Ramsay and Bob Callahan in the late 1990’s:  System 3.  The idea for a zone model was based on Jack Fair’s “Traffic Light”  Model (red, amber, and green) for hardball squash, and the tennis tactical model (Methode des actions) used by Tennis Canada starting in the early 1990’s (copied and adapted a few years later by Nick Bolletieri:  System 5). It should be mentioned that the Squash Canada Coaching Program independently adapted Tennis Canada’s Action Method into their own tactical model (less directive and evolved than System 3).

The model functions by dividing the squash court into three zones: front, mid, and back, and using the difficulty of the ball received  by the player (easy, medium, difficult), to determine the tactical objective of the player’s shot (attack, rally, defend).  The player realizes their tactical objective by choosing a particular technique (e.g., attack a loose ball in the mid-court with a cross-court volley nick). We have developed a “System 5” for international level players which features two more tactical objectives (force and counter-attack) as well as the use of deception.

In the first part of the analysis, we focused on what David did on defence (against a difficult ball) in the back-court:

  • out of 25 shots to the back, David was on defence (forced use of wrist only, stretched-leaning back, adapted swing) only eight times – her very quick perception got her into position quickly enabling her to “rally” most of the balls;
  • she was able to hit good drives 5/8 times (4/5 straight), being forced to boast only once, with only 2 “bad” (loose) shots;
  • she needed, and was very good at “adapted” shortened swings (versus the full drives we normally teach) and use of the wrist;
  • although not a direct goal of the analysis, it is clear that against Grinham, David’s high percentage of volleys in the mid-court, dramatically reduced the number of times she had to play the ball off the back of the court.
  • often she is not looking at the ball/opponent as her opponent impacts the ball, perhaps indicating reliance on the tactical knowledge of her opponent’s tendencies -perhaps Rachel should have tried a few more “surprise” shots.

Here are the back-court video clips, with the “bad” shots towards the end of the video.  Pausing the video gives insight into her approach into the back, her hitting position, and her recovery back to the “T”. In our next post we will examine Nicol David “rallying” from the back-court.


Tim Bacon, M.A., CSCS is the world’s leading expert on racquet sport science and coaching development having taught all areas of sport science as both a Lecturer at Smith College and as a Coach Developer for the Coaching Association of Canada while actively coaching (Squash Canada Level 4 Coach) and sport psychology consulting (25+ World Champions).  He currently runs his consulting practice out of Northampton, MA and maintains his active coaching as the Assistant Squash Coach at Wesleyan University during the CSA squash season (Nov. 1 – Mar. 1).


College & High School Squash Periodization: The Transition Phase starts now!

March 24, 2015

Periodization Chart

Periodization for a college or high school squash coach involves dividing the training and competitive year into four periods (hence the name periodization or periodisation in the Commonwealth and French-speaking countries) in order to make planning easier easier to understand and implement. The short official seasons – about 18 weeks from mid-October to March 1st – of U.S. colleges and high school present some unique challenges in seeking to optimize athlete performance.  The basics of periodization are outlined in some of my previous posts – if you want an overview of what the content of an annual squash periodized plan would look like you can check out this link..  The purpose of this article is to focus on the final period of the annual plan – the transition phase. Before North American squash coaches learned about periodization, this time of year was called the off-season – it started after the National Championships and ended in the fall a few weeks before the start of the next season’s squash tournaments.  In the U.S., many squash players would play tennis in the summer. The disadvantage of this old fashioned approach was that a player would lose nearly all of their squash-specific conditioning, and recommence the next season back at the same level as the prior season.  I have adapted current periodization theory (e.g., Bompa, 2009) and have developed several key recommendations for squash coaches for the Transition Period – the new functional term for “off-season”. Focus X2i iPad My first recommendations center around doing a thorough analysis of athlete performance:

  • Do a thorough evaluation of your players technical, tactical, physical and mental performance at the end of the season – preferably during key matches and final practices leading up to the final competition of the year.
  • A comprehensive technical-tactical analysis of your players is perhaps the most important thing you can do, as this evaluation will form the foundation of their goal-setting for the next season.  This is best done by analyzing match video using a good game analysis software such as FocusX2i for iPad and a logical tactical framework such as the Zone or Egg Model that I use for my analyses.  If you have not done this before, I offer a consulting service where you can send me your player’s video file and I will do the analysis for you – including improvement recommendations and player goals based on the statistics from the analysis.  Alternatively I can train coaches in the use of the software and show you or your assistants how to do your own analysis.
  • An analysis of your player’s mental performance can be done by examining their post-match evaluation forms (if you have used them) for the last few crucial matches of the season, or via paper and pencil tests such as the TOPS (I can provide questionnaires and scoring instructions).
  • An evaluation of your players’ fitness can be done by using their last few fitness test results (ideally one test for each of the three energy systems) and also by simply asking the players to assess each of the physical qualities essential for squash.  The other way is simply to note their performance level during the last few workouts of the season (before the peaking or unloading phase).

Egg Model for Squash Tactics My second set of recommendations concern general advice for the Transition Phase (adapted from Bompa, 2012):

  • Have your players take 4-6 weeks where they do not play squash, but instead do fun and cross-training activities (ultimate frisbee, swimming, etc.) about three times a week, that allow them to maintain their aerobic fitness and slow down the loss of speed and strength gains.
  • This is the period where they should try and rehab any injuries acquired during the season.
  • There should be limited, formal strength training sessions – and if there are any they should be of lower intensity (think strength-endurance: lighter weights 12-15 reps) and feature a high proportion of complementary exercises.  For example the types of exercises found in Exos’ prehabilitation and movement preparation.  One to two sessions a week should be sufficient to serious significant detraining.
  • Especially in the two weeks following the major competition, 15-20 minutes on an exercise bike followed by foam rolling, tennis ball myofascial release and use of a stretching rope 3-4 times a week will aid in regeneration.
  • If athletes set their goals for the next season in the week after the major competition, there is no need to do any formal technical, tactical, or mental training during the transition phase – they can just chill and relax.
  • After 4-6 weeks of the above, players can start their preparation for the next season by starting on their Preparatory Period training activities – a topic I will address in the coming weeks.

 Application for Squash Coaches

  1. Make sure to plan and schedule a 4-6 week “transition” period following your major squash championship in order to allow your players to fully regenerate for the next season.
  2. Do a thorough evaluation, including match video analysis, in order to set effective and meaningful goals with your players at the end of the season.

Basics of Ubersense Video Technique Analysis Workshop

January 31, 2014

Ubersense Logo

What would make this workshop a success from your point of view?

What – specifically – do you want to get out of this workshop?

How have you used video? How would you like to use video?

—————————————————————————————

I  Conceptual Background: Performance Analysis (using video)

The Coaching Process

  • Notational Analysis (Tactical Analysis/Analytics)
  • Technical (Biomechanical Analysis) – we are here today (Ubsersense)

Performance Analysis:  Future Directions

II Ubersense Basics (simple to complex)

  • Download the app
  • Open App and record an athlete’s technique
  • Show the athlete their performance (also in slow motion or frame by frame)
  • Email the video to the athlete
  • Compare the athlete’s technique to an “expert’s” (side-by-side)
  • Use Drawing Tools

Let’s Try it!  in pairs film a squat from the side and go through the workflow above (do each of the “bullet” steps above) – 15 minutes!

III Practical Use of Ubersense

  • immediate video feedback in a practice or game
  • save time – video and email same day – analyze next day
  • save time – no asst. athletes can film selves
  • enhance athlete learning – if they have the app…self-analyze
  • compare to ideal/expert
  • track athlete progress (last year-this year?)
  • other uses?

III  Ubersense Advanced Skills

  • import video from other sources
  • make written notes
  • use voice over
  • create a “video report” for the athlete

IV What’s Next?

  • Keep up to date with Ubersense advances: subscribe to their YouTube Channel or Blog; follow them on Twitter
  • Come to the Advanced Ubersense Workshop
  • Improve your analysis – take a Sport Biomechanics or Kinesiology course to become a better analyzer.
  • Learn and use a Tactical (Notational Analysis) Smartphone App:

– Touchstat Highlight (now Singulus) (limited file size)

– Dartfish EasyTag (need to video separately)

– Focus X2i (for iPad)


Squash Coaches: A New Tagging App for Iphone!

May 12, 2012

You cannot be a “Tactics First” squash coach without having the ability to easily tag video to examine the tactics (i.e., shot choices) that your players use in their matches.  The video tagging procedure involves using computer software to watch a squash video, and then touching a key or button to indicate to the software that you would like to record the action that you are interested in. Performance Analysis and Notational Analysis are the formal terms associated with tagging.  Here is a great link for more info:  The Video Analyst.

Without tagging software, a specific (versus just randomly watching match video with your team or player) tactical analysis that  involves assembling multiple examples of shot choices is very time consuming.  For example with my Smith College squash team, it would take me five hours to assemble 10 examples (five good, five bad) of mid-court attacking tactics (30 min. per 10 players to watch, then edit, then email or post to YouTube) following a match.

For example in this video, I used the Tagging Module of the Dartfish software to capture examples of squash shots played in the front court zone by top female players. I was interested in both the choice of shot (i.e, tactics), and the way the shot was played (i.e., technique).

As a member of the Faculty in the Smith College Department of Exercise & Sport Studies I have access to Dartfish via the five licenses our department has purchased – we were early adopters having used the software since 2004.  Even earlier than that, 1987, I was using tagging elite junior tennis players as part of my Doctoral research using the CompuTennis Software (no longer in business?).

The problem with Dartfish (Windows platform) and GameBreaker (Apple platform), the other popular software used for tagging is the cost – both cost several thousand dollars – so not easily accessible for the average squash professional working alone in a club.  The Video Replay App is $2.99! I have been wondering when an app would come out!

Touchstat Highlight is another more costly option ($24.99) which has greater “potential” as it can be used in conjunction with their desktop software.

Dartfish has an iPhone app, EasyTag (free), that while not actually recording video, can later synch your tagging with the desktop Dartfish software.  In a future post I will go over a more work intensive but “free” way to use EasyTag results with a free video software like Quicktime.

Note that there are a lot of free or low cost apps for both the iPhone and Android software that allow a coach to analyse the technique of a single shot – the sole advantage over simple video replay is the access to drawing tools, and an easier ability to view two actions side-by-side (I just open two Quicktime Windows on my laptop:).

As soon as I finish grading my 64 Introduction to Sport Coaching class assignments (Biomechanical Analysis, Strength Training Program, Skill Coaching Report) I am going to give Video Replay a try!


Front-Court Squash Tactics: WISPA Grinham-Grainger Examples

January 17, 2010

There is very little published on squash tactics – and even less on differences between men’s and women’s squash tactics.  The purpose of this post is to use brief (about 10 points) notational analysis of a pro squash video to examine tactics and movement in the front court at a top world level (Grinham-Grainger Semi-Final 2006 Worlds).

The video analyzed was purchased at the WISPA website, and loaded into Dartfish for analysis with its “tagging module”. : every time the players being analyzed played a shot in the front court zone, I hit a “button” on the tagging panel I designed (based on the “Zone” model), which saved and labelled (e.g., backhand drop winner) a short video clip for later analysis.

Currently, most tactical information is given in a fairly general manner – for example Geoff Hunt’s famous “10 Commandments”.  For the past twenty years I have been using a zone model of squash (developed and tested with the assistance of my Princeton University friends Gail Ramsay and Bob Callahan) to add a high degree of precision and objectivity to any tactical analysis.  By focusing in on one zone at a time (front, mid, back),  the difficulty of the ball received (easy, medium, difficult) and categorizing shots according to the player’s tactical intent (attack, rally, defend) it is possible to develop quite specific tactical guidelines.

What can we learn by focusing our analysis on two of the world’s top players?  Here are a few of the observations and conclusions an analyst might make from this small sample of point seen in the clip below.  This is a great clip to analyze the front-court as we have a classic, defensive retriever (Grinham) playing an opponent with great attacking skills (Grainger) – so lots of play in the front of the court.

  • Grinham’s movement to the front on defence does not really resemble our classic squash ghosting drills – she moves in on a straight path to the ball, even leaning up against the backhand wall to maintain and regain her balance; the racquet work on her defensive lob is a flick with the hand/wrist – not at all like the demonstrations of lobbing from the front that we see in numerous squash books (stroking action from the slow-moving shoulder joint).  Grinham’s return to the “T” in the first front-court example features an about face which I have never seen a squash coach demonstrate in a practice or clinic (yet it obviously occurs and there must be a reason for it).
  • Under pressure in the front, we see that straight drives can result in a stroke against the striker (twice from Grainger in this clip), with cross-court drives being the most successful choice of both players.  This seems to contradict the current squash coaching practice of prescribing lots of “boast-straight drive” drills.  Although practicing straight drives from the front may have a technical and fitness purpose (more physically demanding and allows for “offensive” positioning), coaches should be wary of reinforcing tactical patterns that occur infrequently or are “poor tactical choices”.
  • There does not appear to be a “rally” phase in the front-court – the players are either defending or attacking (whereas in the mid-court we see many exchanges of length shots (“rallying”).
  • On Grainger’s tightest and most difficult shots, Grinham makes at least three racquet errors trying to lob.  I coach my team to redrop or hit a defensive, tight drop since the biomechanics of this action (push-touch with no backswing) are more simple than a lob (wrist snap or flick), a strategy that should result in fewer errors.  My observation of female American players (college/pro) is that they have not been trained sufficiently (too much grooving of ground strokes from mid- and back-courts) in the use of the hand, wrist and touch (certainly compared to the Egyptians and some of the English players).
  • We do not observe the use of the cross-court drop and very little use of deception (once from Grainger?) from these two players – which may be a male-female tactical difference due to men’s greater speed to and in the front-court ( time for deception and ability to cover the cross-court drop if it is not a winner).

Obviously, this tiny “research” needs to be extended with an analysis including entire matches featuring more female players.

Application for Squash Coaches:

  1. Findings from notational analysis of current top players can contradict current practice and published knowledge of squash coaching.
  2. We cannot take it for granted that men and women “play the same game” – something to keep in mind when planning summer camps.

What Does a World Champion do on Defence in the Back-Court?

December 5, 2008

The problem with most published work on notational or performance analysis of squash is that it is stroke or technique centered.  The simplest example of notational analysis would be when a squash coach charts one of their player’s matches by putting a “W” (for winnner) or “E” (for error) on a diagram of a squash court.

Another example of technique-centered performance analysis was our 1987  Squash Canada Level 4 Performance Analysis Task, where we had to chart a video of a match between Dale Styner and John Fleury (both Canadian National Team members), recording every stroke played and the result of the stroke. The output of the analysis was a summary chart of statistics: number of shots played, percentage of winners and errors for each stroke type (forehand drive, backhand drop, etc.).

Information of this type, without a tactical context is not very useful:  for example a player’s technique, and associated success ratio,  in the back of the squash court is very different depending on the difficulty of the received shot, the amount of pressure the player is under, and the characteristics of the opponent (fast vs. slow, retriever vs. shot-maker, etc.).

The best analyses are based on a defined tactical model in order to be able to make precise, specific recommendations to players concerning the improvement of their game.  When I teach the current Level 4 Performance Analysis Task for Squash Canada, the first assignment in the class is for each of the coaches to present the tactical model they use for coaching their players.

In order to demonstrate the usefulness of notational analysis based on a tactical model, I used the Dartfish Tagging  module to analyze the first 25 points of the first game of the  2006 British Open Final (purchase DVD here) between Nicol David (current World #1) and Rachel Grinham.  In this example I restricted the analysis to the backcourt.

The tactical model I used for the example analysis is the “zone” model I developed with the assistance of Princeton’s Gail Ramsay and Bob Callahan in the late 1990’s:  System 3.  The idea for a zone model was based on Jack Fair’s “Traffic Light”  Model (red, amber, and green) for hardball squash, and the tennis tactical model (Methode des actions) used by Tennis Canada starting in the early 1990’s (copied and adapted a few years later by Nick Bolletieri:  System 5). It should be mentioned that the Squash Canada Coaching Program independently adapted Tennis Canada’s Action Method into their own tactical model (less directive and evolved than System 3).

The model functions by dividing the squash court into three zones: front, mid, and back, and using the difficulty of the ball received  by the player (easy, medium, difficult), to determine the tactical objective of the player’s shot (attack, rally, defend).  The player realizes their tactical objective by choosing a particular technique (e.g., attack a loose ball in the mid-court with a cross-court volley nick). We have developed a “System 5” for international level players which features two more tactical objectives (force and counter-attack) as well as the use of deception.

In the first part of the analysis, we focused on what David did on defence (against a difficult ball) in the back-court:

  • out of 25 shots to the back, David was on defence (forced use of wrist only, stretched-leaning back, adapted swing) only eight times – her very quick perception got her into position quickly enabling her to “rally” most of the balls;
  • she was able to hit good drives 5/8 times (4/5 straight), being forced to boast only once, with only 2 “bad” (loose) shots;
  • she needed, and was very good at “adapted” shortened swings (versus the full drives we normally teach) and use of the wrist;
  • although not a direct goal of the analysis, it is clear that against Grinham, David’s high percentage of volleys in the mid-court, dramatically reduced the number of times she had to play the ball off the back of the court.
  • often she is not looking at the ball/opponent as her opponent impacts the ball, perhaps indicating reliance on the tactical knowledge of her opponent’s tendencies -perhaps Rachel should have tried a few more “surprise” shots.

Here are the back-court video clips, with the “bad” shots towards the end of the video.  Pausing the video gives insight into her approach into the back, her hitting position, and her recovery back to the “T”. In our next post we will examine Nicol David “rallying” from the back-court.