Most current Common Lisp compilers generate more efficient code when supplied with data type information. However, in keeping with standard Lisp programming style, most programmers are reluctant to provide type information; they simply allow the run-time type system to manage the data types accordingly. To fill this gap, we have designed and implemented a type inference system €or Common Lisp (TICL). TICL takes a Lisp program that has been annotated with a few type declarations, adds as many declarations as possible, and produces a type declared program. The compiler can then use this information to generate more efficient code. Measurements indicate that a 20 per cent speed improvement can generally be achieved.*In many contexts, it is inappropriate to assume that all integers are fixnurns; (fib 50) would result in a bignurn in many Lisp systems. However, if the programmer desires, there are ways of informing TICL to ignore certain types, such as bignum, as was done in this example. This gives the Lisp programmer the ability to get the efficiency of languages like C and Pascal.
Objectives: Ulnar collateral ligament reconstruction (UCLR) is a common procedure in professional baseball position players. Timing of return to hitting following UCLR is unknown. The purpose of this study was to determine the time to return to batting milestones after UCLR as well as the effect of UCLR upon batting performance in professional baseball players. The authors’ hypothesized that position players would return to batting in an in-season game prior to fielding in an in-season game and hitting performance would remain unchanged following UCLR Methods: All professional position players who underwent UCLR between 2010-2018 were included. Time to batting milestones following UCLR was analyzed. Batting performance before and after UCLR was compared and analyzed. Results: Overall, 141 UCLRs (96% performed on the dominant arm) in 137 position players were included (86% minor leaguers). Four players underwent revision, all within one year of the primary UCLR. With regard to position, catchers and shortstops were over-represented. With regard to batting side, 57% batted from the right and 12% batted as switch-hitters, and thus 76% of surgeries were on the lead arm. While 91% of players were able to return to any throwing at all, there was a progressive gradual decline during the rehabilitation progress such that 77% were able to return to hitting in a real game and 75% were able to return to fielding in a real game. The first dry swing occurred at 150±49 days after surgery, first batting practice occurred at 195±58 days after surgery, and first hitting in a real game occurred at 323±92 days after surgery. However, players generally saw a decrease in their utilization, with fewer at bats (p<0.001) translating into fewer hits (p<0.001) and runs (p<0.001). Conclusion: Professional position players begin swinging at 150 days following UCLR while they do not hit batting practice until 195 days and do not hit in a real game until 323 days following UCLR. Players saw a decrease in hitting utilization following UCLR. [Figure: see text]
Objectives: The purpose of this study was to determine if number of days of rest between outings, number of innings pitched in each outing, number of batters faced in each outing, and being a starting pitcher are risk factors for internal impingement in professional baseball pitchers. Methods: All professional baseball pitchers who were diagnosed with internal impingement between 2011-2017 were identified using the Major League Baseball (MLB) Health and Injury Tracking System (HITS). A separate player usage dataset was used to determine workload. We then compared workload variables between pitcher-games 2, 6, 12, and >12 weeks prior to documented internal impingement to pitcher-games from a control group who were never diagnosed with internal impingement. In a paired analysis, we compared the acute workload (2, 6, 12 weeks) prior to injury to the injured pitcher’s workload >12 weeks prior to injury. Results: There were 624 professional baseball pitchers who were documented in the MLB HITS database as having had internal impingement between 2011-2017. Across all time points, players with more innings pitched per game and more batters faced per game were associated with a higher incidence of subsequent internal impingement compared to controls. However, there were not significantly more innings pitched, more batters faced, or fewer days rest in the acute period (12 weeks) prior to injury when compared to baseline workload. Being a starting pitcher was associated with a higher incidence of internal impingement. Conclusions: Greater pitcher workload and being a starting pitcher were associated with increased risk for internal impingement in professional baseball players. However, this injury was not associated with an acute increase in workload, suggesting that internal impingement may be due to the cumulative effects of workload over a career. [Table: see text]
Objectives: The purpose of this study was to determine the return to sport (RTS) rate and performance upon RTS in professional baseball players who underwent biceps tenodesis. A secondary purpose was to compare the postoperative performance of the group of players who underwent biceps tenodesis to a group of matched controls. Methods: All professional baseball pitchers who underwent biceps tenodesis between 2014 and 2017 were included. Players with concomitant rotator cuff repair were excluded. Demographic and performance data (preoperative and postoperative) were recorded for each player. Performance metrics were then compared between the biceps tenodesis and matched control (no history of biceps tenodesis) groups. Results: 14 players (average age 27±4 years; 12 pitchers, 2 position outfielders) were included. Most (79%) were open subpectoral tenodeses while two were arthroscopic biceps transfers, and one was an arthroscopic suprapectoral tenodesis. Fixation methods included cortical button (42%), interference screw (25%), suture anchor (25%) and drill holes (8%). Most players (79%) underwent concomitant procedures (43% underwent SLAP repairs). Among the 14 players, 2 were unable to RTS, 5 RTS but to a lower level, and 7 RTS at the same or a higher level. Thus, overall, while 86% (12/14) were able to RTS, 50% (7/14) RTS at the same or a higher level and 50% were either unable to return or returned to a lower level. Among pitchers, 100% (12/12) were able to RTS, but only 50% (6/12) were able to return to the same or a higher level. For those players who did return to play, it took 245±84 days, and their performance following RTP was unchanged and did not differ from matched controls. Conclusions: While 86% of professional baseball players returned to sport following biceps tenodesis, only 50% returned to the same or higher level. No decline in performance was noted in players who successfully returned. Open subpectoral tenodesis is the most common tenodesis technique performed on professional baseball players UPLOAD- https://planion-client-files.s3.amazonaws.com/AOSSM/blobs/c7753b55-d658-4847-a8e7-7b70c6cad84f/1/Table_1.docx UPLOAD- https://planion-client-files.s3.amazonaws.com/AOSSM/blobs/961efbc8-aedb-4cfe-b18f-6b8c07d93ec7/1/Table_2.docx UPLOAD- https://planion-client-files.s3.amazonaws.com/AOSSM/blobs/36fbb55a-f22f-468e-a8a3-e7a29979b4b8/1/Table_3.docx None
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