This study quantified the match intensity of the international touch rugby under the revised rules of FIT in 2013 and identified the positional differences on match-play demands. Perhaps, this is also the first study that directly assessed the specificity of training and the physical loads of international touch rugby games. In comparison with the limited published results, the 40-min match-play data in this study demonstrated comparable results. The overall total distance of 2773.49 ± 442.48 m was within the range from 2265.80 m in international level to 2970.60 m in regional level (Beaven et al., 2014), respectively. The maximum velocity of 6.98 ± 0.34 m·s-1 in matches was close to previous records of 6.94 m·s-1 in New Zealand elite touch players (Ogden, 2010) and 7.25 m·s-1 in England international touch players (Beaven et al., 2014). However, the rules of touch had been modified since 2013; therefore, the present study would provide a more up-to-date investigation of international touch match demands. Compared to other rugby varieties, such as rugby 7s (e.g. Forwards: 7.50 ± 0.90 m·s-1; Backs: 8.00 ± 1.10 m·s-1, Higham et al., 2016) and rugby union (e.g. 8.20 ± 1.30 m·s-1, Tee et al., 2016a), the maximal velocity reached during the game and the training in touch rugby were also relatively lower. Though the contact phases are removed, ball-carrier needs to slow down for dump on the mark, i.e. put the ball on the ground between feet after being touched. This rule is the nature of touch rugby and it demands players to decelerate quickly instead of running with momentum. Small to large positional differences in locomotor variables were recorded in match-play. Wings are deemed to be a unique player performing different running characteristics during matches. Compared with link and middle, wings covered longer distances in walking, jogging, and running at < 4.00 m·s-1 (Dwyer and Gabbett, 2012). In this study, for each match, three outside players (i.e., wings) and 11 inside players (i.e., link and middle) were listed in the 14-player team list. Obviously, the lower distances covered by the inside players were related to the reduced playing time and the greater number of these players on the field for each match. This finding was similar to that in a previous study in handball (Büchel et al., 2019), which demonstrated a similar game pattern and substitution rules as touch rugby. Substitution and team composition are crucial tactical decisions to enhance or maintain players’ effective attack and defensive involvement in rugby varieties (Michael et al., 2019). Prolonged on-field play fatigued players to underperform; thus, reduced total and high-intensity running distance was also observed in rugby union (Tee et al., 2016b) and rugby sevens (Higham et al., 2012). Rolling substitution is a game rule of touch rugby and a game tactics that help mitigate the detriment of fatigue as well as injury incidence (Fuller et al., 2016). During match-play, attacking (such as effective handling and passing) and defensive involvements (such as effective “touch” and forced turnover) usually heavily rely on the inside players. This kind of game pattern could be found in similar team sports, for instance, in handball, backcourt players and pivots performed more high demanding actions in match than wings, such as turns, stops, jumps, and changes in direction (Póvoas et al., 2014). Therefore, the team composition ideally combines more inside players and fewer outside players, allowing the former to share the heavier workload. On the contrary, the limited number of substitutes requires wings to attain a “physiological reserve” (Waldron and Highton, 2014), allowing them to perform high-speed running during matches when necessary. The greater distance (range, 372.46 to 404.74 m) covered in walking and jogging (velocity zones 1 to 3) by wings could be the results of their self-regulation on running pace. Frequent high-intensity running combined with multiple low-intensity activities allows wings to minimize the physical stress. It is crucial for the wings to adopt an effective pacing strategy (Drust et al., 2007; Waldron and Highton, 2014) to manage their energy resources during a match. As such, it is expected that the locomotor variables of the position differed. The findings of this study supported this notion, where middle players exhibited an extremely greater distance compared with other positions at velocity zone 4, suggesting that they have unique playing demands to cover wider space using relatively high running speed. However, this study did not attempt to quantify the variables regarding ball-in-play time (Gabbett, 2015; Pollard et al., 2018; Ross et al., 2015). As such, future analyses should attempt to include this component of competition to provide a more holistic assessment of the maximum match-play demands, which may then help improve the specificity of touch rugby training. Another critical finding of this study was the considerable disparity in the locomotor variables between match-play and training demands in national touch rugby players. Compared with match-play demands, training was characterized as having similar or even higher training intensity, for example, higher maximum velocity (extremely large effect size). In match-play, players ran only at their sub-maximal velocity (91.80 ± 3.43% of maximum velocity), which was similar to the case in rugby union (Duthie et al., 2006). The speed difference might be caused by the dynamic environment in competitions. Linear long-distance sprinting and repeated bouts are allowed in training session, while match-play sprinting would be limited in multiple short bouts only (Dwyer and Gabbett, 2012). Practically, running at sub-maximal velocity in matches enables players to perform skills at a faster running speed. Previous studies showed that improved maximal running speed allowed athletes to have a greater repeated sprinting ability (Buchheit and Mendez-Villanueva, 2014) and a wider anaerobic speed reserve (Sandford et al., 2019). In future studies, it is important to determine the type and duration of multiple short bouts in matches and to identify how it relates to the maximum sprinting ability in touch rugby players. Since there are only minimal resources related to the match-play demands in touch rugby (Beaven et al., 2014), training sessions are designed based on the common understanding of the sport and investigations of rugby varieties. Small-sized games, match-simulation drills, and tactical training are adopted in the training sessions to condition players to accelerate and to develop maximum running velocity as well as prepare specific tactics. In particular, the current finding illustrated similar distance covered in velocity zones >5.50 m·s-1 in both match-play and training (Table 2), suggesting that the training intensity matched the actual matches. Small-sized games appear to be the most useful training to match up the actual game demands (Giménez and Gomez, 2019). It is a similar case in pre-professional rugby union training (Campbell et al., 2018), as coaches were more likely to emphasize high-intensity training using a small-sized game approach (Giménez and Gomez, 2019). However, training activities emphasized in skill development and match-based scenarios elicited fewer high-intensity running loads than matches (Campbell et al., 2018; Tee et al., 2016a). The influence of the coaching approach on the training specificity is worth further investigations. Reviewing the comparison results between the match-play demands and training loads in this study, the low-intensity running and tendencies of acceleration and deceleration may have medium to extremely large differences. Players need to cover a greater distance in matches, predominantly at the velocities from jogging to running. One study, in particular, had similar findings that players jogged more in matches than in training (Tee et al., 2016a), which may be an essential pacing strategy to reserve energy for high-intensity ball-in-play (Drust et al., 2007; Waldron and Highton, 2014). Thus, multifaceted training considerations should be taken into account for high-performance athletic development (Duthie, 2006; Ross et al., 2014). In light of the above, overemphasizing high-intensity training might limit the opportunity for active recovery and hinder players to perform optimally. However, the recent whole-match average analysis may not fully reflect the maximum match-play demand (Pollard et al., 2018). The peak activity profile might better represent the game and training rugby demands (Delaney et al., 2017). Future investigation should be considered to adopt the peak activity analysis approach for maximum intensity demand. The count of the rapid change of speed (>3m·s-2 acceleration : >3m·s-2 deceleration, 15.44 : 17.41) in 20-min halves touch rugby match overtopped those demands in other sports, soccer (12 :19 to 14 : 24 in each half, Russel et al., 2016) and international rugby union players (> 60-min play: U20: 4.77 : 9.78 to 7.29 : 14.45 and Senior: 2.89 : 8.78 to 5.94 : 14.29, Cunningham et al., 2016). With the shorter match-play duration, the higher number of rapid changes of speed stress players’ capacity in agility. Surprisingly, of the three international matches, heavier reliance was observed on deceleration than on acceleration, and the disparity suggested that the training substantially underprepared players for this particular physical demand, which may be a key to win. Rapid deceleration (≥ 3.00 m·s-2 over a period of 0.50 s) is a key component of multidirectional speed and always happens when players slow or stop their centers of mass and regain balance in response to external stimuli or distractions (Chow et al., 2017; Hewit et al., 2011). High-level players adopted multiple running tactics in the attack, which expected players to run fast in response to the flow of play. In contrast, defenders respond to the offensive opponents reactively that need to stop quickly and change their direction. The heavier reliance of deceleration in this study may be due to the stress caused by defensive play, which requires defensive players to move forward and retire 5 m after “touch”. However, from the recent data, it is still unclear to tell when and where deceleration moves were practiced. Future studies should investigate the key moments of acceleration and deceleration in touch rugby. To improve the deceleration ability, coaches may consider developing the four major physical components (Kovacs et al., 2015), namely, dynamic balance, eccentric strength, power, and reactive strength. However, according to the new model of agility suggested by Young et al. (2015), together with physical qualities, cognitive and technical qualities should be included in the training. Therefore, integrating deceleration-focused drills (Lockie et al., 2014) with original training designs are deemed necessary to improve the training specificity. |