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Commentary: Teaching Games of Understanding (TGfU) coaching effects on Heart Rate among Malaysian and Indian Junior Hockey Players

Sanmuga Nathan*

Sultan Idris Education University, Malaysia


Teaching Games for Understanding (TGfU) offers tactical-technical instruction is gaining international recognition for its ability to produce intelligent players via a problem-solving approach in game play such as hockey. However the effect of TGfU pedagogical approach through small side game play (SSG) towards physiology components of Heart Rate (HR) still takes a backseat compared to research on tactical decision making and skill execution that has been studied widely. SSG proposed in TGfU approach dwells around duration of game play (load), how fast the SSG game manouvers (intensity) and players cardiovascular fitness can be detected by HR tool and therefore HR crucial to be investigated. This quasi-experimental study investigated the effect of TGfU compared to skill mastery instruction, termed as Skill Drill Technical (SDT), among Malaysian and Indian elite junior hockey players in terms of SSG game play intensity via heart rate (HR) measurement at different points of game play. A total of n = 60 players with an average age of 15 ± 1.03 were selected via simple random technique from both countries involved in this study and assigned equally into groups, with 15 players per group for TGfU and for SDT across Malaysia and India. Gathered data were analysed using the ANOVA and ANCOVA techniques. There was significant higher warm-up HR bpm among players via TGfU compated to SDT across the two countries. Whereas HR bpm immediately after the 5 vs. 5 game play intervention and HR bpm after three minutes’ recovery, Indian players with TGfU recorded a higher and significant difference compared to SDT. However, in contrast, findings indicated no significant difference between these two instruction models among Malaysian player. Therefore, overall findings reiterated that TGfU is a useful approach for game play to enhance intensity and cardiac output through HR bpm measurement. In conclusion, future research can employ together HR and RPM (Borg Scale) or electronic device for more accurate reading coupled 6 sec and 15 sec HR readings. Future study, should too address the effect of TGfU on different variation of small sided game play intensity along skill execution and tactical decision making.


Teaching Games for Understanding (TGfU) a tactical-technical small sided game play (SSG) pedagogical learning model seems to be much sought-after in physical education and coaching contexts globaly1-3. While the traditional linear teaching pedagogical approach of skill mastery with structured skills-led teacher/coach centred approach termed as Skill-drill Technical (SDT) in this research still being practiced in some parts of the world based on situated and cultural learning background4-6. On the hand physiological components such as heart rate and V02 max valuable tools used to asses game players cardiovascular fitness and intensity of training intervention. As for standard norm highest training intensity lies between 90%-100% of maximum HR bpm (171-180 bpm) for highest fitness performance. While moderate intensity fitness performance requires 80-90% maximum HR bpm (152-171 bpm) and lower intensity fitness only requires 70-80% maximum HR bpm (133-152 HR bpm)7. Meanwhile a part from measuring main training intervention HR bpm, warming up HR bpm is crucial to optimize the perforamce, and the warming up HR bpm should hit around 65-85% maximum HR or 70-105 bpm8. Moreover recovery HR bpm equally crucial in too determining players fitness, a drops of HR 20 bpm at first minutes after stopping of game play indicates players fitness are good. However if the heart rate (bpm) drops less than 12 bpm indicated player less fit.

Meanwhile research findings indicated small sided game play (SSG) of 3 vs.3 was able to elicited higher percentage % of HR compared offical match (OM) and 9 vs. 9 soccer game play9. Hence 3 vs. 3 small sided game play able to enhance higher intensity which crucial for higher fitness. However, very little practical application and research has been undertaken about the effect of pedagogical intervention on small sided game play (SSGs) intensity and fitness performance. Whereas full sided game play or SSG activities boils down time duration of game play (load) and how is fast the game being played being played depends on the intensity. The studies by ACSM indicated increase in V02 max and cardiac output dependents on intensity of activity10. However, again limited research has been undertaken to investigate both the TGfU and SDT pedagogical approaches effects the players activity intensity measured through Heart Rate (HR). In contrast reasonable number of research has been conducted in terms of tactical decision making and skill execution. TGfU emphasizes on SSG activity, while SDT involved structured skill teaching and the game play activities, therefore these kind of activities involves load (total volumes of activities) and how fast the players movements (intensity). Bascially increase in intensity of activity that can effect players cardiovascular fitness. Therefore activity intensity and duration of activity (load) crucial to be investigated through HR reading.

TGfU model evolved as a practical application of using six-step game based learning model through tactical-technical approach, as illustrated in Figure 1, evolved at Loughborough University in the late 1960s4. Another TGfU version with some added of cue perception, skill drills and situated learning perspective was coined as the revised version of TGfU by Kirk and MacPhail as in Figure 26. However these two TGfU versions emphasises on tactical and skill elements of game play, without giving consideration to the importance of HR bpm as index to control small sided game play intensity.

JCCS-19-1151-Fig1

Figure 1. Original TGfU model, 1982 (with permission, Rod Thorpe)

JCCS-19-1151-Fig2

Figure 2. Revised TGfU, 2002 (with permission David Kirk)

TGfU is at the early stages of implementation in Physical Education (PE) curriculum and research perspective in Malaysia. On the other hand based on anecdotal findings and Google search of TGfU seems to be less known coaching approach and PE context in India. In addition, majority of coaches in Malaysia and India much prefer skill-based (SDT) coaching that gives importance to biomechanics principles and a motor learning teaching approach, whereby tactical elements of decision making and problem solving—the key tenets of TGfU taking backseat. Similarly, in the Indian coaching and teaching context of field hockey very much into skill-based technical model of SDT11. This similarity in skilled-based technical (SDT) approach in coaching context between Malaysia and India are probably due to a shared eastern tradition and cultural background as the eastern tradition values the coach or teacher (guru) as source of inspiration, knowledge in their endowers. As mentioned earlier, TGfU game approach model, which focuses mainly on tactical decision making and skill execution using small sided game play (SSG).

The game of hockey, whether field hockey or ice hockey, is characterized by a high volume of load, anaerobic intensity and cardiovascular fitness as well as the need for good recovery to optimize game-play performance5,14. Training volume and load are easily monitored via duration of time spent on activities such as small-sided game play, but intensity are much more difficult to assess15. Tools such as such as heart rate (HR), oxygen consumption, weight lifted, blood lactate and rate of athlete’s perception of effort (RPE) during training allow researchers to measure training intensity8,12,13. Some studies investigate the HR measurement using small sided game play. Lang and Liu in their three month intervention of 4vs.4 game play among Beijing female youth soccer players improved their average HR of 177 b/min and the maximum oxygen uptake of 94.81 mL/kg16. These findings contrast to findings of Sell and Ledesma examined maximum heart rate (MHR) and energy expenditure using ten female field hockey players during competitive play using the Yo-Yo Intermittent Endurance test to determine maximum heart rate. No significant differences in MHR were observed between playing positions16.

Findings from Polish junior national ice-hockey players’ playing intensity as low, moderate and high, based on their heart rates (HRs) recorded during a game using the maximum oxygen uptake test to determine intensity zones. Findings indicated the forwards spent more time in the low-intensity zone than the defence men17. Another study by Cherappurath and Kabeer investigated football and handball players (n=30 players, aged 19-22). Findings indicated no significant difference in resting pulse rate between soccer players and handball players18.

Drawing from various studies as discussed above, the importance of various research HR bpm and small sided game play activities to determine intensity as well as aerobic and anaerobic metabolism. Therefore small-sided game play, as proposed in TGfU, significantly contributes to higher cardiac intensity, and therefore coaches should monitor this closely via heart rate (HR) as it’s important tools in coaching game such as field hockey via TGfU. In hockey, to date, limited research has been conducted examining the intensity and cardiac output of small-side game play advocated pedagogical TGfU in practical game play application4,9,19.

Eventhough HR crucial in sports and game coaching, limited study has been undertaken to investigate the effect of TGfU via mini or small-sided game-play intensity evaluated using the crucial HR tool. Furthermore limited comparisom research has been conducted to investigate the effect of pedagogical model such as TGfU compared the traditional skill based approach known as Skill-Drill Technical (SDT) in terms small sided game players HR, what more camparison across different countries and settings.

The present research employed a balanced sample experimental design with a pre-and post-test control group design investigated the effects of pedagogical model of TGfU and the traditional skill based approach known as Skill-Drill Technical (SDT) in coaching context that was tested Malaysia and India in hockey game coaching environment. The effectiveness these two pedagogical approaches was assessed and evaluated in terms HR beats/intensity before, immediately after and after three minutes’ recovery of 5 vs. 5 small sided field hockey game play among Malaysian and Indian junior elite hockey players before and after training intervention.

Participants junior hockey players were recruited systematically who were representative of the limited population that were available across the two countries. Participants concerned were granted through their coaching academics in India and the Malaysian Education Ministry that control the Sports School in Malaysia, all participants safety were taken care of. In each countries 30 players were selected randomly, in line with Cohen’s sampling power of .80 and furthermore as for statistically analysis each cell minimum requirement 15 samples only20.

The Malaysian sample consists of n = 30 sports school players, aged 15 years ± 1.0, who were selected randomly out of a total of n = 45 players; using only 30 in this sample was a limitation of this study. This sample was assigned and distributed equally into groups of TGfU, n = 15 and SDT model, n = 15. As for the Indian players, they also comprised a sample of n = 30 players out of a possible 60 from Indian academic junior hockey players (aged 14–16 ± 2.0 years old), who were selected randomly using the simple random sampling technique and assigned equally into groups of TGfU, n = 15 and control group SDT, n = 15.

This research, employed radial HR to measure intensity at different points of small-sided hockey game play. The most popular post-exercise pulse palpation utilized radial (wrist) heart rate measurement for 6 s (number HB in 6 s × 10 to get HR beatsmins-1 because it is relatively easy and requires no equipment21. In this research, to measure HR or pulse rate, the Wrist Radial palpitation method was used to take the pulse at three different point intervals in order to measure HR before (warm-up HR) and after small-sided game play of 5 vs. 5, and another HR was collected after 3 min of game play to determine recovery HR. In detail, the following interval HRs were measured: (a) before small-sided game play of 5 vs. 5, (b) immediately after 5 vs.5 small game play, and (c) final interval HR (recovery HR) after 3 min of 5 vs. 5 small-sided game play to detect the rate of players’ recovery at pretest and post-test. The pulse was taken for 10 s × 6 for three times to get average pulse rate for 1-min pulse rate reading. Meanwhile, participants were given three trials of HR measurement before the actual study to make them comfortable with the radial palpation technique.

The selected players in the TGfU and SDT intervention groups underwent three (3) specific training activities based two models instructions two sessions per week for two (2) hour for five weeks consecutively as training load. Both groups in Malaysia and India followed similar activities in terms of training volume (2 hours per session), intensity (low intensity at 120–140 HR, medium intensity at 130–150 HR and high intensity at 150–170 HR) based Karvonen HRR (Heart Rate Reserve) formula light intensity of 30%-40%, 40%-60% moderate intensity and vigorous intensity 60%-90%19. As for rest, active recovery of three (3) minutes were given from one activity to another activity. The TGfU group predominantly trained their tactics, skills, fitness and physical conditioning components via small-sided game situations. Game play were the main coaching activities to improve their related game-play skills, in tactical thinking and solving game-related strategies of attacking and defending in game-play situations. Briefly, the TGfU coaching process encourages the players to discuss and think by answering questions and solving game-play problems through practical application. Questions are based on ‘what to do’ and ‘how to do’ in terms of manipulating tactics and proper skill execution in game play. The TGfU approach helps the players to decide on applying appropriate tactics and skills in small-sided game situations and activities4,22. On the other hand, SDT coaching underpinned linear instruction conducted by coaches, were in terms of volume and intensity activities as well rest is similar in which to the TGfU approach. However the SDT focuses on skill teaching and learning, mastery skill, skill drills activities and feedback as emphasized on skill mastery as the main content of coaching. Players were also given some form of game play, either small-sided game play or full game play, allocated at the end of each coaching unit. The implementation of these two intervention models periodized based on sports training principles and motor learning principles13,23.

As HR responds to warm-up rate, after mini-game activities and recovery HR, pre- and post-tests were calculated based on total number of pulses per minute. Pre-test data was screened for normality using the Kolmogorov-Smirnov and Shapiro-Wilk tests for all dependent variables; the findings of both tests indicated no significant difference with p > 0.05, hence, normality of data prevailed. Data from all the dependent variables from pre-test and post-test were analysed through ANOVA using SPSS software version 21. Furthermore, the inferential statistic of ANCOVA was employed to confirm the results when significant difference was yielded at the pre-test level.

The following statistical results were recorded as in Table 1, for Malaysian players in term of HR. For pre-test, warm-up HR before intervention indicated no significant difference between players in TGfU (82.07 ± 4.46) and SDT (84.1 ± 4.04), F(1,28) = 1.65, p > 0.05. In contrast, the post-test result for warm-up HR before small-sided game play indicated a significant difference between TGfU (78.86 ± 2.87) and SDT (77.60 ± 3.45), F(1,28) = 5.27, p < 0.05. Pre-test HR immediately after small-sided 5 vs. 5 game play indicated no significant difference between TGfU (135.20 ± 6.70) and SDT (130.60 ± 4.11), F(1,28) = 0.220, p > 0.05. Post-test HR immediately after small-sided 5 vs. 5 game play also revealed no significant difference between TGfU (126.26 ± 5.68) and SDT (128.20 ± 5.44) among Malaysian players, F(1,28) = 1.87, p > 0.05. For recovery HR after three minutes, pre-test results indicated no significant difference between TGfU (82.46 ± 4.45) and SDT (83.20 ± 4.10) among Malaysian players F(1,28) = 0.906, p > 0.05. Post-test results for HR after three minutes also indicated no significant difference between the TGfU (79.33 ± 4.20) and SDT (80.13 ± 4.58) pedagogical models, F(1,28) = 0.906, p > 0.05.

Table 1. HR (Mean/SD) for phases of activities for Malaysian junior players.
Model/Phase TGfU SDT Significant
Pre-test warm-up HR before game play 82.07 ± 4.46 84.1 ± 4.04 F(1,28) = 1.65, p > 0.05
Post-test warm-up HR before game play 78.86 ± 2.87 77.60 ± 3.45 F(1,28) = 5.27, p < 0.05
Pre-test HR immediately after game play 135.20 ± 6.70 130.60 ± 4.11 F(1,28) = 0.220, p > 0.05
Post-test HR immediately after game play 126.26 ± 5.68 128.20 ± 5.44 F(1,28) = 1.87, p > 0.05
Pre-test HR after 3 min recovery game play 82.46 ± 4.45 83.20 ± 4.10 F(1,28) = 0.906, p > 0.05
Post-test HR after 3 min recovery game play 79.33 ± 4.20 80.13 ± 4.58 F(1,28) = 0.248, p > 0.05

The following results were recorded for Indian hockey players as in Table 2, in terms of HR findings. The pre-test warm-up HR before the intervention phase indicated no significant difference between players in TGfU (83.80 ± 6.96) and SDT (84.26 ± 3.61), F(1,28) = 0.053, p > 0.05. However, the post-test result for warm-up HR indicated significant difference detected between TGfU (82.66 ± 6.21) and SDT (77.86 ± 3.22), F(1,28) = 7.04, p > 0.05. For pre-test HR, immediately after 5 vs. 5 game play indicated significant difference between TGfU (134.80 ± 5.78) and SDT (128.40 ± 4.48), F(1,28) = 11.46, p < 0.05. Post-test HR immediately after 5 vs. 5 small-sided game play revealed significant difference between TGfU (136.73 ± 5.68) and SDT (130.60 ± 4.11) among Indian players, F(1,28) = 8.80, p < 0.05. Therefore, to confirm this result, ANCOVA analysis was carried out as stipulated in Tables 3 and 4, and the findings confirmed that there was a significant difference between these two models after intervention in terms of HR immediately after 5 vs. 5 game play. This result was of analysis covariate (ANCOVA), indicated significant difference between these two models immediately after game play, F(1,27) = 5.05, p < 0.05. As Table 3 and the estimated marginal means for HR immediately after play at post-test are presented in Table 4. For recovery HR after three minutes of 5 vs. 5 small-sided game play, pre-test results indicated no significant difference between TGfU (87.00 ± 5.35) and SDT (85.06 ± 4.09) among Indian players F(1,28) = 1.22, p > 0.05. However, post-test results for HR after three minutes of 5 vs. 5 small-sided game play results indicated significant difference between the TGfU (100.53 ± 4.38) and SDT (95.73 ± 6.95) pedagogical models, F(1, 28) = 5.11, p > 0.05.

Table 2. HR (M/SD) phase of activities for Indian junior players.
Model/Phase TGfU SDT Significant
Pre-test warm-up HR before game play 83.80 ± 6.96 84.26 ± 3.61 F(1,28) = 0.053, p > 0.05
Post-test warm-up HR before game play 82.66 ± 6.21 77.86 ± 3.22 F(1,28) = 7.04, p < 0.05
Pre-test immediately game play 134.80 ± 5.78 128.40 ± 4.48 F(1,28) = 11.46, p < 0.05
Post-test immediately game play 136.73 ± 5.68 130.60 ± 4.11 F(1,28) = 8.80, p < 0.05
Pre-test after 3 min recovery game play 87.00 ± 5.35 85.06 ± 4.09 F(1,28) = 1.22, p > 0.05
Post-test after 3 min recovery game play 100.53 ± 4.38 95.73 ± 6.95 F(1,28) = 5.11, p < 0.05

 

Table 3. Analyses of covariance summary for HR immediately after 5 vs. 5 game play.
Source Sum of Square df Mean Square F Sig
Group 128.183 1 128.183 7.98 0.10

 

Table 4. Estimated marginal means for immediately after 5 vs. 5 game play.
Programme Mean SE 95% Confidence Interval
Lower Bound Upper Bound
TGfU 133.97 a 1.40 131.00 136.84
SDT 129.22 a 1.40 126.35 132.100

As for pre-test warm-up intensity, HR bpm indicated no significant difference between the TGfU and SDT models among players in both Malaysia and India, as TGfU and SDT both recorded a higher warm-up HR bpm, probably due to low levels of fitness. There was a slightly lower significance difference between the two models in terms of mean HR bpm in both countries at post-test mean warm-up HR bpm. However, the TGfU model recorded significantly higher warm-up HR bpm (Malaysia: 78.86 bpm; India: 82.60 bpm) compared to SDT in both countries after intervention which within the recommended norm of warm up 65-85% maximum HR or 70-105 bpm8. This was probably due to game based warm up activities manipulated by TGfU approach compared SDT which utilized structured warming up with 3-4 jogging, static stretching and dynamic warming up activities in both countries. Therefore game led warm up activities underpins TGfU trigger higher intensity and increase HR bpm at warming up stage.

Next, findings for HR bpm immediately after small-sided 5 vs. 5 game play at post-test indicated a significant difference between these two instructional models only for Indian players using TGfU (136.73 ± 5.68) compared to Malaysian players with a higher HR bpm. The effect of TGfU training approach enable the Indian players to hit moderate intensity fitness within standard norm of 130-152 bpm, whereas Malaysian players played in lower intensity fitness with TGfU and SDT models7. This was probably due to style of Indian hockey playing that utilize dribbling and stick-work strenuous workout compared to Malaysian players more hitting and passing approach and limited higher intensity of movement even when using the TGfU approach. The present findings the effect of TGfU among India players are similar to findings by Asci, which indicated that 3 vs. 3 game play recorded higher HR and % HR max compared to 9-a-side game play9. The findings for Indian players in this research are in line with the findings of Ghosh, Goswami, Mazumdar, and Mathur, whose study indicated that junior hockey players’ (n = 25; 18 ± 0.6 years) mean heart rate during a full hockey match was 143.4 bpm19,24. Therefore, the TGfU model, through small-sided game play, maximized physiological adaptations especially for Indian hockey through small sided game play, hence similar to distance runners’ exercise programmes25,26.

These findings were less similar to findings by Capranica and associates, who found HR bpm values exceeding 170 beatsmin−1 represent high-intensity work activities27. If this is the case, then the present research HR bpm results suggest that the young players participating in both small-sided games should work at higher levels of intensity. Again the present HR bpm findings in this study after intervention recorded lower HR bpm compared to findings of Clemente & Rocha28, who recorded higher HR at two phases of 2 vs. 2 small-sided game play (171 beats/min and 177 beats/min), while 4 vs. 4 recorded 159 beats/min and 167 beats/min. However, the present findings revealed that Indian players recorded higher HR bpm compared to the Malaysian players in small-sided game play.

Post-test results for Malaysian players after three minutes’ recovery recorded lower HR bpm using TGfU (79.33 ± 4.20) and SDT (80.13 ± 4.58) compared to HR bpm immediately after game play. On the other hand, the Indian players’ recovery HR bpm also indicated reduced HR compared to HR immediately after game play. However, Indian player recovery HR recorded higher HR bpm for the TGfU group (100.53 ± 4.38) and the SDT (95.73 ± 6.95) compared to Malaysian players’ recovery HR bpm. These results indicated moderate positive recovery as there was at least 20 HR bpm drop at all these models across two countries, however to achieve highest fitness level HR bpm should drop to 60%-70% maximum HR bpm.

These findings indicate that younger players tolerate moderate HR bpm reading during the recovery period after a small-sided game of 5 vs. 5 among both Malaysian and Indian hockey players. The present findings illustrated that the TGfU style of game play increased HR bpm findings among both Malaysian and Indian players, which is important for blood circulation and improving players’ physiological systems. However, this research findings indicates that Indian players are able to increase their HR bpm during game play and are slower in recovery compared to Malaysian players due to tradition and background style of playing, especially with the Indian players employing dribble and stick-work techniques movement skills and bll control in small-sided game play. In contrast, Malaysian players utilize hit-and-run playing tactics that do not increase game play intensity and recovery HR bpm drop faster. However, based on Indian players’ style of playing, there was significant influence and support for higher fitness level through HR bpm measures for TGfU that emphases small-sided game play being able to sub-maximize game-play intensity. The present findings similar with findings by Castellano and associates29. Futhermore the present findings are in line with findings by Mclean and associates, who indicated that number of players in small-sided game play and game format do influence physiological and physical intensity demands differently, hence HR bpm was affected by this influence9,30.

Findings for post-test warm-up intensity HR bpm performances indicated significant difference between these two models with TGfU recorded higher HR bpm across players in two countries. For HR bpm immediately after 5 vs. 5 small sided game intervention and HR bpm after three minutes’ recovery, findings among Indian players indicated a significant difference between the two pedagogical models compared to Malaysian players. Based on the present findings, TGfU, through small-sided game play, is able to enhance intensity and cardiac output of the players during game play based Indian players findings. Future research should address the importance of monitoring the effect of pedagogical model such as TGfU in terms of other small sided game variation to measure the game play intensity. In order to accurately measure game play intensity, future research can employ both HR bpm or RPE with Borg Scale. As overall pedagogical models of coaching do influence physiological and physical attributes such as intensity and volume of any game play, especially in negotiating small-sided game play. In conclusion, in order for TGfU to be more relevant for future research, TGfU proponents ought to address linking game play attributes such as skill execution, tactical decision making with physiological parameters. Although this study employed radial heart rate and future study should use more advance electronic HR bpm device for more accurate reading, determining other physiological and biochemical measurement as to examine at pre-and post-exercise variation of small sided game play through TGfU model across different category game play.

The study has been supported by a small grant from the Sultan Idris Education University of Malaysia (2011-0036-107-01). The writer acknowledges the support of the Education Ministry of Malaysia (KP(BPPDP) 603/5/JLD.9, 52) in allowing the use of sports school players, as well as Prof. Gl Khanna, India of Manav Rachna International University, India, and the Indian hockey coaches (Dr. Ajay Bansal and Dr. Kaushik) for giving logistic support to materialize researching Indian hockey players. The write acknowledges to TGfU-SIG colleagues Dr. Thorpe, Prof. Steve Mitchell, Prof. David Kirk, Prof. Adrian Turner and appreciate their kind permission in using and adapting their models and instruments.

The authors declare no conflict of interest.

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Article Notes

  • Published on: June 13, 2019

Keywords

  • TGfU
  • Skill-drill-Technical (SDT)
  • Heart-rate (HR) bpm
  • Small sided game play
  • Intensity
  • Warm up
  • Training effect
  • Recovery

*Correspondence:

Dr. Sanmuga Nathan
Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak, Malaysia
Email: sanmuga@fsskj.upsi.edu.my.

©2019 Nathan S. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License.