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Background: Athletes who are well prepared for the physical demands of competition are less susceptible to injury. Defining and then preparing athletes for these in-game demands is critical to athlete health and performance. The injury burden within Major League Baseball (MLB) is significant and differs by position. Despite its importance, the workload demands have not been described for position players in MLB. Hypothesis: That running demands would be significantly higher for outfielders, followed by infielders, and catchers, respectively, while batting and baserunning metrics would be similar across positions. Study Design: Cohort study. Level of Evidence: Level 3. Methods: Total and high-speed running distance (>75% Vmax), high-speed running count, hard accelerations (>2.78 m/s/s), defensive and baserunning minutes, total and hard throws (>75% max), and bat swing counts were calculated from Statcast data. Players with 100 games or more in the 2018 season (n = 126) were included for analysis. Results: All offensive and baserunning metrics were similar across positions; however, significant positional differences were observed for defensive and overall workload metrics. High-speed running was highest among outfielders (F 1,7 = 27.1, P < 0.01), followed by infielders, then catchers. Hard accelerations (F 1,7 = 12.9, P < 0.01) were highest among first basemen, then outfielders, remaining infielders, and catchers. Total throws (F 1,7 = 17.7, P < 0.01) were highest among middle infielders. Hard throws (P < 0.01) were highest among shortstops and third basemen. Conclusion: In-game workloads differ significantly by defensive position in MLB. These differences in running, throwing, and hitting volumes have significant implications for physical preparation and injury return-to-play progressions to optimize performance and minimize injury and reinjury risk for these athletes. Clinical Relevance: These data provide insight into how best to prepare athletes of different positions for the demands of the game both in terms of preseason preparation as well as return-to-play benchmarks following injury. These data should also serve as a platform for future research into the relationship between workload and injury among professional baseball players. [ABSTRACT FROM AUTHOR]

Introduction: Platelet-rich plasma (PRP) injections may improve symptoms in patients suffering from knee osteoarthritis. However, there is a lack of data on its effectiveness in a "real-life" cohort. This multi-site institutional registry study aimed to assess patients' longitudinal progress after PRP injection for knee osteoarthritis., Materials and Methods: All patients receiving PRP injections for knee osteoarthritis at a large, integrated tertiary academic center (December 18, 2017 to March 1, 2021) were eligible. A prospective data collection instrument was used to collect patient demographics, procedural information, and patient-reported outcome measures. Overall, 97 patients met the inclusion criteria, and 53 were included in the analysis., Results: One in four patients (26%) improved on all three Knee Injury and Osteoarthritis Outcome Score subscales: 17% in two subscales and 20% in one subscale, respectively. Overall, 64% of patients improved in at least one patient-reported outcomes measure. At six months post injection, 49% of patients were satisfied., Conclusion: PRP injection provides positive changes in two out of three patients in different magnitudes and characteristics with careful attention to clinically meaningful differences.