Lu, D, McCall, A, Jones, M, Kovalchik, S, Steinweg, J, Gelis, L & Duffield, R 2020, 'Injury epidemiology in Australian male professional soccer.', Journal of science and medicine in sport, vol. 23, no. 6, pp. 574-579.View/Download from: Publisher's site
OBJECTIVES:To describe the injury epidemiology of the Australian male professional soccer league (A-League) over 6 consecutive seasons. DESIGN:Prospective observational cohort study. METHODS:Match-loss injury data was collected from each A-League club (n=10) for each competition match (n=27/season) over 6 seasons (2012/13-2017/18). Injuries were collected weekly through a standardised protocol and were classified by setting, mechanism, severity, the type and location on the body. Generalised Linear Models were used to estimate the injury incidences (injury/round/season), whilst rate ratios were reported for total injuries and within abovementioned injury classifications. RESULTS:Overall injury incidence was not significantly different ranging from 4.8 (95%CI:4.1-5.8) to 6.7 (95%CI:5.8-7.8) between seasons 2012/13 to 2017/18 (p>0.05). Match injuries remained stable whilst training injuries decreased across the 6 seasons (exp(β) 0.59[95%CI:0.36-1.0]; p=0.04). Respectively, contact and non-contact injuries were not significantly different across the 6 seasons, although non-contact injuries were more common than contact injuries (p>0.05). Mild severity injuries decreased (exp(β) 0.64 [95%CI:0.4-0.9];p=0.02), whilst moderate severity injuries increased (exp(β) 1.7 [95%CI:1.0-2.8];p=0.04) in season 2017/18 compared to 2012/13. The most common injuries were at thigh (23-36%), of which the majority were hamstring injuries (54%-65%) of muscle/tendon type (50-60% of total injuries/season). Injuries remained stable across the seasons by type and location (p>0.05 and p>0.05, respectively). CONCLUSIONS:Injury rates, mechanisms, locations and types have remained relatively stable over recent seasons of the A-League. Current Australian professional soccer league medical practices may have contributed to the stability of injury rates.
Noor, D, McCall, A, Jones, M, Duncan, C, Ehrmann, F, Meyer, T & Duffield, R 2019, 'Transitioning from club to national teams: Training and match load profiles of international footballers.', Journal of science and medicine in sport, vol. 22, no. 8, pp. 948-954.View/Download from: Publisher's site
OBJECTIVES:To quantify and profile the training and match loads of international footballers as they transition from club-to-camp-to-tournament contexts during multiple international tournaments. DESIGN:Retrospective single-cohort observational study. METHODS:External (session duration and count) and internal (session Rating of Perceived Exertion [s-RPE]) load data of all outfield players from the same national team were compared between club, pre-tournament camp and initial tournament phases of 3 recent international competitions. Further, load profiles were compared between each phase based on the acute:chronic (A/C) ratio using a 7 to 21-day ratio. RESULTS:Moderate-to-large effect sizes existed for increased number of sessions (ES=1.92; 90% CI: 1.56, 2.27) and s-RPE training load (ES=1.16; 0.84, 1.48) from club to camp. Conversely, transitioning from camp-to-tournament showed very large effects for decreased number of training sessions (ES=-3.17; -3.47, -2.86) and s-RPE training load (ES=-2.05; -2.35, -1.75), alongside increased number of matches (ES=1.87; 1.55, 2.18) and s-RPE match load (ES=1.57; 1.25, 1.89). Consequently, a moderate effect was evident for increased A/C ratio during the club-to-camp transition (ES=1.02; 0.70, 1.33), while a moderate decrease in the A/C ratio occurred during the tournament (ES=-0.76; -1.06, -0.46). CONCLUSIONS:International footballers showed expected increased training load when entering into pre-tournament camps, predominately via increased number of training sessions. Subsequent reductions in training volume coincide with increased match volume, though total load decreases. Such profiles provide insight into load accumulation transitioning from club to national teams in international footballers.
Ardern, CL, Dupont, G, Impellizzeri, FM, O'Driscoll, G, Reurink, G, Lewin, C & McCall, A 2019, 'Infographic. Unravelling confusion in sports medicine and science practice: A systematic approach', British Journal of Sports Medicine.View/Download from: Publisher's site
Fullagar, HHK, McCall, A, Impellizzeri, FM, Favero, T & Coutts, AJ 2019, 'The Translation of Sport Science Research to the Field: A Current Opinion and Overview on the Perceptions of Practitioners, Researchers and Coaches', SPORTS MEDICINE, vol. 49, no. 12, pp. 1817-1824.View/Download from: Publisher's site
Impellizzeri, FM, McCall, A & Meyer, T 2019, 'Registered reports coming soon: our contribution to better science in football research', Science and Medicine in Football, vol. 3, no. 2, pp. 87-88.View/Download from: Publisher's site
Fullagar, HHK, Harper, L, Govus, A, McCunn, R, Eisenmann, J & McCall, A 2019, 'Practitioner Perceptions of Evidence-Based Practice in Elite Sport in the United States of America', JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, vol. 33, no. 11, pp. 2897-2904.View/Download from: Publisher's site
Ward, P, Coutts, AJ, Pruna, R & McCall, A 2018, 'Putting the "I" Back in Team', INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE, vol. 13, no. 8, pp. 1107-1111.View/Download from: Publisher's site
McCall, A, Jones, M, Gelis, L, Duncan, C, Ehrmann, F, Dupont, G & Duffield, R 2018, 'Monitoring loads and non-contact injury during the transition from club to National team prior to an international football tournament: A case study of the 2014 FIFA World Cup and 2015 Asia Cup.', Journal of Science and Medicine in Sport, vol. 21, no. 8, pp. 800-804.View/Download from: Publisher's site
Injured and non-injured national team footballers were compared for external and internal loads during transition from club to National team training camp.Prospective Case Study.Load and injury data were collected from the same National team prior to and during training camps of 2 tournaments; World (n=17) and Asian Cups (n=16). External (number sessions) and internal (s-RPE) loads were collected 4-weeks prior to and during camps. The acute:chronic load ratio was calculated for the first week of camp based on the mean of previous 4-weeks. Respective loads and ratios were compared between injured and non-injured players for non-contact injuries occurring during camp.Seven non-contact injuries occurred during World Cup camp and 1 during Asian Cup (preventing statistical analyses). Small-to-moderate effect sizes were found for lower chronic internal loads (ES=0.57; 90% CI: 0.39-1.08) and higher acute:chronic ratio (ES=0.45; 90% CI: 0.31-0.87) for injured compared to non-injured players. Moderate-large effects (ES=0.83; 90% CI: 0.56-1.60) were evident for increased acute:chronic ratio for number of sessions in injured compared to non-injured players. However, small-moderate effect sizes were present for lower chronic training and match loads (ES=0.55; 90% CI: 0.38-1.06) in injured players prior to the World Cup camp, alongside an increased number of sessions in week 1 of camp (ES=0.47; 90% CI: 0.33-0.91).Players incurring non-contact injury during training camp prior to an international tournament performed less prior chronic external and internal load and a concomitant higher relative increase in camp, thus representing a practical marker to monitor in national teams.