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Rating of perceived exertion is mainly related to physical demands of judo matches and sessions
Journal of Science and Medicine in Sport 20S (2017) 52–54
Contents lists available at ScienceDirect
Journal of Science and Medicine in Sport journal homepage: www.elsevier.com/locate/jsams
Rating of perceived exertion is mainly related to physical demands of judo matches and sessions
101 Rating of perceived exertion is mainly related to physical demands of judo matches and sessions S. Bromley 2,∗ , M. Drew 1 , S. Talpey 1 , A. McIntosh 1 , C. Finch 1 1
Australian Institute of Sport, Australia Australian Collaboration for Research into Injury in Sport and its Prevention (ACRISP), Federation University Australia, Australia 2
Introduction: Rate of Perceived Exertion (RPE), physical and mental demand (NASATLX-Phys, NASATLX-Men) are measures of workload that have been utilised in several sports. Evidence for RPE and NASATLX use in Judo training is lacking, therefore, the aim of this study was to determine whether these were valid measures of workload in judo. Methods: Twenty-nine judoka attending an international camp participated in this study (age = 21.9 ± 4.1 years). Competitive level ranged from club (n = 14, female:male = 4:10) to elite (n = 15, female:male = 3:12). Twelve elite Japanese judoka attended the camp as training partners (age = 15–17 years; female:male, 3:9). Data was collected across 2 × 2 h sessions with the final 60 min consisting of 4 min judo bouts with 4 min recovery periods. Immediately after each judo bout, judoka recorded their opponent’s number and nationality, bout number, and gave RPE (b-RPE) and NASATLX scores (b-NASATLX-Phys and b-NASATLX-Ment). Measures were also collected post-session (s-RPE, s-NASATLX-Phys, s-NASATLX-Ment). Mixed-models ordered logistic regression were utilized. Results: Mental and physical demand were positively related to bRPE (bNASATLX-Men Coef. = 0.60 [0.40–0.80 95%CI], p < 0.001, NASATLX-Phys Coef. = 1.60 [0.40–2.8 95%CI], p = 0.009). Being in the National Talent Identification (NTID) category was positively related to b-RPE (NTID Coef. = 4.82 [−1.60 to 8.93 95%CI], p = 0.005). Having an elite international opponent was related to RPE (Coef. = −2.49 [−4.56 to −0.41 95%CI], p = 0.019). Gender, HR, and bout number were not related to b-RPE. Overall session scores showed that total number of bouts and physical demand were related to s-RPE (NASATLX-Phys Coef. = 3.03–5.07 [1.56–6.83 95%CI, p ≤ 0.001], total bouts Coef. = 1.00 [0.38–1.61 95%CI, p = 0.002]). Post-session blood lactate, gender and measures of HR were not related to RPE.
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Discussion: Results indicate that coaches can accurately compare b-RPE of men and women and with some confidence of a diminutive carryover of fatigue between bouts. Data shows that b-RPE is sensitive to changes in competitive level and physical and mental workload across bouts. Both b-RPE and s-RPE can be compared across the genders. The s-RPE is primarily related to an increase in number of bouts and a judoka’s physical exertion. Both session and bout RPE can be used as measures of workload in judo, however they seem to be largely related to physical, rather than mental demand. Coaches can monitor training load by utilising both b-RPE and s-RPE with reasonable validity. https://doi.org/10.1016/j.jsams.2017.09.297 102 The player load associated with typical activities in elite netball J. Bailey 1 , P. Gastin 1 , L. Mackey L 2 , D. Dwyer 1,∗ 1
Centre for Sport Research, Deakin University, Australia 2 Victorian institute of Sport, Australia Background: Previous investigations of player load in netball have utilised subjective methodologies, with few utilising objective measures of player load. Whilst all studies report differences in player activities or total load between playing positions, it is unclear how the differences in player activity explain differences in positional load. Therefore, the aim of this study was to objectively quantify the load associated with typical activities for all playing positions in elite netball. Methods: The player load of all playing positions in an elite netball team, was measured during two complete matches, using wearable accelerometers. The participants were elite netball players from the Melbourne Vixens (age = 26 ± 4.9 years, height = 183.2 ± 8.7 cm) ANZ Championship League squad (n = 12). Video recordings of the matches were also analysed, to record the start-time and duration of 13 commonly reported netball activities (divided into locomotor and non-locomotor categories). The load associated with each activity was determined by time-aligning both datasets (load and activity). A total of 18,745 discrete activities were identified and player load was determined for each of these. Results: Off-ball guarding produced the highest player load per instance, while jogging produced the greatest player load per
Contents lists available at ScienceDirect
Journal of Science and Medicine in Sport journal homepage: www.elsevier.com/locate/jsams
Rating of perceived exertion is mainly related to physical demands of judo matches and sessions
101 Rating of perceived exertion is mainly related to physical demands of judo matches and sessions S. Bromley 2,∗ , M. Drew 1 , S. Talpey 1 , A. McIntosh 1 , C. Finch 1 1
Australian Institute of Sport, Australia Australian Collaboration for Research into Injury in Sport and its Prevention (ACRISP), Federation University Australia, Australia 2
Introduction: Rate of Perceived Exertion (RPE), physical and mental demand (NASATLX-Phys, NASATLX-Men) are measures of workload that have been utilised in several sports. Evidence for RPE and NASATLX use in Judo training is lacking, therefore, the aim of this study was to determine whether these were valid measures of workload in judo. Methods: Twenty-nine judoka attending an international camp participated in this study (age = 21.9 ± 4.1 years). Competitive level ranged from club (n = 14, female:male = 4:10) to elite (n = 15, female:male = 3:12). Twelve elite Japanese judoka attended the camp as training partners (age = 15–17 years; female:male, 3:9). Data was collected across 2 × 2 h sessions with the final 60 min consisting of 4 min judo bouts with 4 min recovery periods. Immediately after each judo bout, judoka recorded their opponent’s number and nationality, bout number, and gave RPE (b-RPE) and NASATLX scores (b-NASATLX-Phys and b-NASATLX-Ment). Measures were also collected post-session (s-RPE, s-NASATLX-Phys, s-NASATLX-Ment). Mixed-models ordered logistic regression were utilized. Results: Mental and physical demand were positively related to bRPE (bNASATLX-Men Coef. = 0.60 [0.40–0.80 95%CI], p < 0.001, NASATLX-Phys Coef. = 1.60 [0.40–2.8 95%CI], p = 0.009). Being in the National Talent Identification (NTID) category was positively related to b-RPE (NTID Coef. = 4.82 [−1.60 to 8.93 95%CI], p = 0.005). Having an elite international opponent was related to RPE (Coef. = −2.49 [−4.56 to −0.41 95%CI], p = 0.019). Gender, HR, and bout number were not related to b-RPE. Overall session scores showed that total number of bouts and physical demand were related to s-RPE (NASATLX-Phys Coef. = 3.03–5.07 [1.56–6.83 95%CI, p ≤ 0.001], total bouts Coef. = 1.00 [0.38–1.61 95%CI, p = 0.002]). Post-session blood lactate, gender and measures of HR were not related to RPE.
1440-2440/
Discussion: Results indicate that coaches can accurately compare b-RPE of men and women and with some confidence of a diminutive carryover of fatigue between bouts. Data shows that b-RPE is sensitive to changes in competitive level and physical and mental workload across bouts. Both b-RPE and s-RPE can be compared across the genders. The s-RPE is primarily related to an increase in number of bouts and a judoka’s physical exertion. Both session and bout RPE can be used as measures of workload in judo, however they seem to be largely related to physical, rather than mental demand. Coaches can monitor training load by utilising both b-RPE and s-RPE with reasonable validity. https://doi.org/10.1016/j.jsams.2017.09.297 102 The player load associated with typical activities in elite netball J. Bailey 1 , P. Gastin 1 , L. Mackey L 2 , D. Dwyer 1,∗ 1
Centre for Sport Research, Deakin University, Australia 2 Victorian institute of Sport, Australia Background: Previous investigations of player load in netball have utilised subjective methodologies, with few utilising objective measures of player load. Whilst all studies report differences in player activities or total load between playing positions, it is unclear how the differences in player activity explain differences in positional load. Therefore, the aim of this study was to objectively quantify the load associated with typical activities for all playing positions in elite netball. Methods: The player load of all playing positions in an elite netball team, was measured during two complete matches, using wearable accelerometers. The participants were elite netball players from the Melbourne Vixens (age = 26 ± 4.9 years, height = 183.2 ± 8.7 cm) ANZ Championship League squad (n = 12). Video recordings of the matches were also analysed, to record the start-time and duration of 13 commonly reported netball activities (divided into locomotor and non-locomotor categories). The load associated with each activity was determined by time-aligning both datasets (load and activity). A total of 18,745 discrete activities were identified and player load was determined for each of these. Results: Off-ball guarding produced the highest player load per instance, while jogging produced the greatest player load per