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trate that inadequate evaluation of reliability in asymmetry leads to biased results. Practitioners should use caution when considering the results of asymmetry assessments as they may not be as reliable as they are often portrayed.
Davids, CJ, Raastad, T, James, L, Gajanand, T, Smith, E, Connick, M, McGorm, H, Keating, S, Coombes, JS, Peake, JM, and Roberts, LA. Similar morphological and functional training adaptations occur between continuous and intermittent blood flow restriction. J Strength Cond Res 35(7) 1784-1793, 2021-The aim of the study was to compare skeletal muscle morphological and functional outcomes after low-load resistance training using 2 differing blood flow restriction (BFR) protocols. Recreationally active men and women (n = 42 [f = 21], 24.4 ± 4.4 years) completed 21 sessions over 7 weeks of load-matched and volume-matched low-load resistance training (30% 1 repetition maximum [1RM]) with either (a) no BFR (CON), (b) continuous BFR (BFR-C, 60% arterial occlusion pressure [AOP]), or (c) intermittent BFR (BFR-I, 60% AOP). Muscle mass was assessed using peripheral quantitative computed tomography before and after training. Muscular strength, endurance, and power were determined before and after training by assessing ing an isokinetic endurance task increased pre-post training (p less then 0.001, CON 3.6%, BFR-C 9.6%, BFR-I 11.3%). Perceptions of pain (p = 0.026) and effort (p = 0.033) during exercise were higher with BFR-C; however, these reduced with training (p = 0.005-0.034). Overall, these data suggest that when 30% 1RM loads are used with a frequency of 3 times per week, the addition of BFR does not confer superior morphological or functional adaptations in recreationally active individuals. Furthermore, the additional metabolic stress that is proposed to occur with a continuous BFR protocol does not seem to translate into proportionally greater training adaptations. The current findings promote the use of both intermittent BFR and low-load resistance training without BFR as suitable alternative training methods to continuous BFR. These approaches may be practically applicable for those less tolerable to pain and discomfort associated with ischemia during exercise.
Ramirez-Campillo, R, Garcia-Pinillos, F, Chaabene, H, Moran, J, Behm, DG, and Granacher, U. Effects of plyometric jump training on electromyographic activity and its relationship to strength and jump performance in healthy trained and untrained populations a systematic review of randomized controlled trials. J Strength Cond Res 35(7) 2053-2065, 2021-This systematic review analyzed the effects of plyometric jump training (PJT) on muscle activation assessed with surface electromyography during the performance of strength and jumping tasks in healthy populations across the lifespan. A systematic literature search was conducted in the electronic databases PubMed/MEDLINE, Web of Science, and SCOPUS. Only randomized controlled studies were eligible to be included in this study. Our search identified 17 studies comprising 23 experimental groups and 266 subjects aged 13-73 years, which were eligible for inclusion. The included studies achieved a median Physiotherapy Evidence Database score of 6. No injuries were retions associated to muscle activation measurement during strength and jumping tasks, and (c) limitations associated with PJT prescription. Future studies in this field should strive to solve these methodological shortcomings.
Gäbler, M, Prieske, O, Elferink-Gemser, MT, Hortobágyi, T, Warnke, T, and Granacher, U. see more Measures of physical fitness improve prediction of kayak and canoe sprint performance in young kayakers and canoeists. J Strength Cond Res XX(X) 000-000, 2021-Markers of talent selection and predictors of performance in canoe and kayak sprint are not yet well defined. We aimed to determine the combination of variables (i.e., demographic, anthropometric, and physical fitness) that most accurately predicts sprint performance (i.e., 500- and 2000-m race time) in semielite, young kayakers and canoeists (n = 39, age 13 year, 10F). The level of significance was set at p < 0.05. Linear regression analyses identified boat type (i.e., kayak or canoe), skeletal muscle mass, and average power during a 2-minute bench pull test, normalized to body mass, as predictors of 2000-m race time (R22000 m = 0.69, Akaike information criterion [AIC] = 425) and together with vertical jump height, as predictors of 500-m race time (R2500 m = 0.howed the strongest semipartial correlations with the 2-minute bench pull test (0.7 ≤ r ≤ 0.9). Adding physical fitness data (i.e., 2-minute bench pull test) to demographic and anthropometric data improves the prediction accuracy of race times in young kayak and canoe athletes. The characteristics of physical fitness tests should resemble as much as possible the biomechanical (e.g., prime movers) and metabolic (e.g., duration) demands of the sport.
Minimally invasive sacrocolpopexy (SCP) is a compelling surgical procedure that requires advanced laparoscopic suturing and dissection skills and knowledge of pelvic retroperitoneal anatomy. The aim of this study was to develop a low-cost laparoscopic SCP model and educational curriculum to improve dissection and suturing skills along with anatomic knowledge to avoid complications.
The pelvic SCP model was developed with easily available material that was placed on the commercial pelvic bone model to construct a vagina, major vessels, ureter, peritoneum, and areolar tissue. A comprehensive curriculum encompassing didactic and technical skills components on the pelvic model was used to teach laparoscopic SCP. Participants completed precurriculum and postcurriculum multiple-choice questionnaires to evaluate the didactic component. A modified Objective Structured Assessment of Technical Skills (OSATS) tool was used to measure technical skills before and after technical skills curriculum.
Among the 10 senior residents, 6 (60%) were studying at their fourth postgraduate year, and 3 (30%) were studying at their third postgraduate year. Postcurriculum test scores (14.5 vs 10.6) for assessment of cognitive knowledge were significantly improved (P < 0.001). The median postcurriculum OSATS scores (26.5; range, 18-30) were significantly improved (P = 0.005). Laparoscopic SCP OSATS scores increased from median 21 to median 26.5 after cognitive and technical curriculum, showing a 21.4% improvement. The majority (70%) of residents believed that the SCP model would be useful to enhance skills acquisition before performing the skill in the operating room.
A low-fidelity laparoscopic SCP curriculum showed improvement in cognitive knowledge and technical skills.
A low-fidelity laparoscopic SCP curriculum showed improvement in cognitive knowledge and technical skills.