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Time-Trial Performance of Para-Cycling Athletes With Visual Impairment in Tandem Competitions: A Retrospective Analysis of 20 Yrs. Am J Phys Med Rehabil 2021; 100:1190-1195. [PMID: 34091464 DOI: 10.1097/phm.0000000000001817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Identifying performance variables associated with visual impairment classification in para-cycling is one of the steps to improve the evidence-based classification system, and consequently, bring equality in Paralympic sports. Thus, this retrospective study aimed to analyze a 1-km tandem-track race performance among para-cyclists (male and female) with different visual impairment degrees (B1, B2, and B3) and to verify the retrospective performance over 20 yrs in all sport classes. The data were extracted from 427 para-cyclists (251 male and 176 female) who competed in the Para-Cycling World Championships and Paralympic Games. The following performance variables were analyzed: time trial, velocity, pace strategies, and number of medals. A one-way analysis of variance was used to compare performance variables among athletes of different sport classes (B1, B2, and B3) and χ2 tests were implemented to test the association between sport classes and medal distribution with a level of significance set at a P value of less than 0.05. The main results revealed that partially sighted athletes exhibited better tandem-track race performance compared with blind athletes (P < 0.05). Significant associations between sport classes and medal distribution in male (P = 0.026) and female (P = 0.017) athletes were found (higher in B3 athletes). Only 23.2% of male and 41.5% of female B3 athletes were medalists, and B3 athletes performed better specifically compared with B1 in most race distances. Finally, B2 and B3 athletes showed higher performance improvements than B1 throughout 20 yrs in the male group. It was concluded that male and female visual impairment athletes who classified as B1 displayed lower tandem-track race performance and medal frequency compared with partially sighted athletes, mainly considering those in the B3 class. The competitive system for athletes with visual impairment should be improved to provide more equity in the track para-cycling events.
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Raguindin PF, Bertolo A, Zeh RM, Fränkl G, Itodo OA, Capossela S, Bally L, Minder B, Brach M, Eriks-Hoogland I, Stoyanov J, Muka T, Glisic M. Body Composition According to Spinal Cord Injury Level: A Systematic Review and Meta-Analysis. J Clin Med 2021; 10:jcm10173911. [PMID: 34501356 PMCID: PMC8432215 DOI: 10.3390/jcm10173911] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/16/2021] [Accepted: 08/23/2021] [Indexed: 12/17/2022] Open
Abstract
The level of injury is linked with biochemical alterations and limitations in physical activity among individuals with spinal cord injury (SCI), which are crucial determinants of body composition. We searched five electronic databases from inception until 22 July 2021. The pooled effect estimates were computed using random-effects models, and heterogeneity was calculated using I2 statistics and the chi-squared test. Study quality was assessed using the Newcastle–Ottawa Scale. We pooled 40 studies comprising 4872 individuals with SCI (3991 males, 825 females, and 56 sex-unknown) in addition to chronic SCI (median injury duration 12.3 y, IQR 8.03–14.8). Individuals with tetraplegia had a higher fat percentage (weighted mean difference (WMD) 1.9%, 95% CI 0.6, 3.1) and lower lean mass (WMD −3.0 kg, 95% CI −5.9, −0.2) compared to those with paraplegia. Those with tetraplegia also had higher indicators of central adiposity (WMD, visceral adipose tissue area 0.24 dm2 95% CI 0.05, 0.43 and volume 1.05 L 95% CI 0.14, 1.95), whereas body mass index was lower in individuals with tetraplegia than paraplegia (WMD −0.9 kg/mg2, 95% CI −1.4, −0.5). Sex, age, and injury characteristics were observed to be sources of heterogeneity. Thus, individuals with tetraplegia have higher fat composition compared to paraplegia. Anthropometric measures, such as body mass index, may be inaccurate in describing adiposity in SCI individuals.
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Affiliation(s)
- Peter Francis Raguindin
- Institute of Social and Preventive Medicine, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland; (O.A.I.); (T.M.); (M.G.)
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
- Graduate School for Health Sciences, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
- Correspondence:
| | - Alessandro Bertolo
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
| | - Ramona Maria Zeh
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
| | - Gion Fränkl
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
| | - Oche Adam Itodo
- Institute of Social and Preventive Medicine, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland; (O.A.I.); (T.M.); (M.G.)
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
- Graduate School for Health Sciences, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland
| | - Simona Capossela
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
| | - Lia Bally
- Department of Diabetes, Endocrinology, Nutritional Medicine, Metabolism, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse 15, 3010 Bern, Switzerland;
| | - Beatrice Minder
- Public Health & Primary Care Library, University Library of Bern, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland;
| | - Mirjam Brach
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
| | - Inge Eriks-Hoogland
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
- Swiss Paraplegic Center, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland
| | - Jivko Stoyanov
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
| | - Taulant Muka
- Institute of Social and Preventive Medicine, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland; (O.A.I.); (T.M.); (M.G.)
| | - Marija Glisic
- Institute of Social and Preventive Medicine, University of Bern, Mittelstrasse 43, 3012 Bern, Switzerland; (O.A.I.); (T.M.); (M.G.)
- Swiss Paraplegic Research, Guido A. Zäch Str. 1, 6207 Nottwil, Switzerland; (A.B.); (R.M.Z.); (G.F.); (S.C.); (M.B.); (I.E.-H.); (J.S.)
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Williams AM, Gee CM, Voss C, West CR. Cardiac consequences of spinal cord injury: systematic review and meta-analysis. Heart 2018; 105:217-225. [PMID: 30262456 DOI: 10.1136/heartjnl-2018-313585] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 08/23/2018] [Accepted: 08/25/2018] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE Conduct a meta-analysis to determine the impact of traumatic spinal cord injury (SCI) on echocardiographic measurements of left ventricular (LV) structure and function. METHODS MEDLINE and Embase were used for primary searches of studies reporting LV echocardiographic data in individuals with SCI. Of 378 unique citations, 36 relevant full-text articles were retrieved, and data from 27 studies were extracted for meta-analyses. Literature searches, article screening and data extraction were completed by two independent reviewers and compared for agreement. Primary analyses compared echocardiographic indices between individuals with SCI and able-bodied individuals, using a random effects model. RESULTS Data are reported as pooled effect estimates (95% CI). Data from 22 articles (474 participants) were included in the primary meta-analysis. Compared with able-bodied individuals, individuals with SCI had reductions to LV stroke volume of 11.8 mL (95% CI -17.8 to -5.9, p<0.001), end-diastolic volume of 19.6 mL (95% CI -27.2 to -11.9, p<0.001) and LV massindex of -7.7 g/m2 (95% CI -11.6 to -3.8, p<0.001), but ejection fraction was not different between the groups (95% CI -2.6% to 0.6%, p=0.236). Individuals with SCI also had altered indices of diastolic function, specifically a lowered ratio of early-to-late filling velocities (p=0.039), and augmented ratio of early diastolic flow-to-tissue velocities (p=0.021). CONCLUSIONS Individuals with SCI have smaller LV volumes and mass, and altered systolic and diastolic function. While this meta-analysis demonstrates important alterations to echocardiographic measures of cardiac structure and function at rest, future work should consider the impacts of SCI on the heart's capacity or 'reserve' to respond to physiological challenges. PROSPERO REGISTRATION NUMBER CRD42017072333.
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Affiliation(s)
- Alexandra Mackenzie Williams
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, British Columbia, Canada.,Department of Cellular and Physiological Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Cameron Marshall Gee
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, British Columbia, Canada.,Faculty of Education, School of Kinesiology, Vancouver, British Columbia, Canada
| | - Christine Voss
- Department of Pediatrics, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Christopher Roy West
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, British Columbia, Canada.,Department of Cellular and Physiological Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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Wang PX, Li ZM, Cai SD, Li JY, He P, Huang Y, Feng GS, Luo HB, Chen SR, Liu PQ. C33(S), a novel PDE9A inhibitor, protects against rat cardiac hypertrophy through upregulating cGMP signaling. Acta Pharmacol Sin 2017. [PMID: 28649129 DOI: 10.1038/aps.2017.38] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Phosphodiesterase-9A (PDE9A) expression is upregulated during cardiac hypertrophy and heart failure. Accumulating evidence suggests that PDE9A might be a promising therapeutic target for heart diseases. The present study sought to investigate the effects and underlying mechanisms of C33(S), a novel selective PDE9A inhibitor, on cardiac hypertrophy in vitro and in vivo. Treatment of neonatal rat cardiomyocytes (NRCMs) with PE (100 μmol/L) or ISO (1 μmol/L) induced cardiac hypertrophy characterized by significantly increased cell surface areas and increased expression of fetal genes (ANF and BNP). Furthermore, PE or ISO significantly increased the expression of PDE9A in the cells; whereas knockdown of PDE9A significantly alleviated PE-induced hypertrophic responses. Moreover, pretreatment with PDE9A inhibitor C33(S) (50 and 500 nmol/L) or PF-7943 (2 μmol/L) also alleviated the cardiac hypertrophic responses in PE-treated NRCMs. Abdominal aortic constriction (AAC)-induced cardiac hypertrophy and ISO-induced heart failure were established in SD rats. In ISO-treated rats, oral administration of C33(S) (9, 3, and 1 mg·kg-1·d-1, for 3 consecutive weeks) significantly increased fractional shortening (43.55%±3.98%, 54.79%±1.95%, 43.98%±7.96% vs 32.18%±6.28%), ejection fraction (72.97%±4.64%, 84.29%±1.56%, 73.41%±9.37% vs 49.17%±4.20%) and cardiac output (60.01±9.11, 69.40±11.63, 58.08±8.47 mL/min vs 48.97±2.11 mL/min) but decreased the left ventricular internal diameter, suggesting that the transition to heart failure was postponed by C33(S). We further revealed that C33(S) significantly elevated intracellular cGMP levels, phosphorylation of phospholamban (PLB) and expression of SERCA2a in PE-treated NRCMs in vitro and in ISO-induced heart failure model in vivo. Our results demonstrate that C33(S) effectively protects against cardiac hypertrophy and postpones the transition to heart failure, suggesting that it is a promising agent in the treatment of cardiac diseases.
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