73 research outputs found
Reduction of delayed onset muscle soreness by a novel curcumin delivery system (Meriva®): a randomised, placebo-controlled trial
No full textBackground: Delayed onset muscle soreness (DOMS) due to eccentric muscle activity is associated with inflammatory responses and production of reactive oxygen species (ROS) that sustain both inflammation and oxidative stress. Curcumin, a powerful promoter of anti-oxidant response, is one of the best-investigated natural products, and is now commercially available as a lecithin delivery system (Meriva (R), Indena SpA, Milan) with improved bio-availability. The aim of this study was to test whether curcumin could attenuate damage from oxidative stress and inflammation related to acute muscle injury induced by eccentric continuous exercise. Methods: This was a randomised, placebo-controlled, single-blind pilot trial. Twenty male healthy, moderately active volunteers were randomised to curcumin given as the Phytosome (R) delivery system 1 g twice daily (200 mg curcumin b.i.d.) or matching placebo. Supplementation was initiated 48 hours prior to a downhill running test and was continued for 24 hours after the test (4 days in total). Muscle damage was quantified by magnetic resonance imaging, laboratory tests and histological analyses on muscle samples obtained 48 hours after the test. Patient-reported pain intensity was also recorded. Results: Subjects in the curcumin group reported less pain in the lower limb as compared with subjects in the placebo group, although significant differences were observed only for the right and left anterior thighs. Significantly fewer subjects in the curcumin group had MRI evidence of muscle injury in the posterior or medial compartment of both thighs. Increases in markers of muscle damage and inflammation tended to be lower in the curcumin group, but significant differences were only observed for interleukin-8 at 2 h after exercise. No differences in markers of oxidative stress and muscle histology were observed. Conclusions: Curcumin has the potential for preventing DOMS, as suggested by its effects on pain intensity and muscle injury. Larger studies are needed to confirm these results and further clarify the mechanism of action of curcumin.Prof. Martino Recchia (Medistat s.a.s.) is acknowledged for statistical analysis. Editorial assistance for the preparation of this manuscript was provided by Luca Giacomelli, PhD; this assistance was funded by Indena
The Athlete With Asthma and the New 2010 Anti-Doping Regulations. Less Work to Change for a Limited Therapy
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Vertical jump assessment on volleyball: A follow-up of three seasons of a high-level volleyball team
No full textBorràs, X, Balius, X, Drobnic, F, and Galilea, P. Vertical jump assessment on volleyball: A follow-up of three seasons of a high-level volleyball team. J Strength Cond Res 25(6): 1686-1694, 2011—This is a longitudinal descriptive study whose purpose is to assess the physical state of male volleyball players competing at the international level, comparing their jump heights during 3 different seasons. National team sample relies upon trainer decisions, and it was different every season. There were 23, 15, and 13 players in the first, second, and third years, respectively. Subjects underwent a vertical test protocol consisting of rocket jump, squat jump (SJ), countermovement jump (CMJ), CMJ with arms (CMJa), and spike jump (DJb) at the preparation period of the national team season. In 2007, an extra evaluation was performed during the competitive period. A contact mat was used for the assessment. An increase of jump height was observed over the years, with SJ and DJb increasing significantly (FSJ = 5.4; FDJb = 4.7; p < 0.05). The elasticity index decreased significantly between 2007 and 2008 (FEI = 8.5; p < 0.05), whereas arm utilization index and approach index increased, but this increase was not statistically significant. A significant increase in SJ and DJb was also observed between the 2 tests performed in 2007, whereas a nonsignificant increase was observed for CMJ and CMJa. The results indicate a better performance of explosive strength, elastic-explosive strength, and reflex-elastic-explosive strength and a better use of arms during jumps
Talent, expert o les dues coses
No full textDe vegades és difícil distingir els conceptes d’individu amb
talent i individu expert. Sens dubte, això és degut a que els
individus que assoleixen l’èxit en l’esport, la música, el teatre,
la literatura, etc. mostren ambdues condicions: una si
es vol innata, el talent, i una altra adquirida, la de ser expert.
També, de vegades, desitjaríem que els talents treballessin
per a ser experts, aspecte que els elevaria a un grau
superior d’excel·lència.
En el present article es realitza una posada al dia d’ambdós
conceptes amb l’objectiu d’establir una base adequada sobre
la que sostenir amb més solidesa les decisions i actuacions
del formador. També es presenten algunes nocions
sobre el seguiment i control dels nois que gaudeixen en les
canteres esportives sempre amb l’orientació bàsica de formar
individus complerts amb un rendiment òptim.Distinguishing between the concepts of talent and expertise
is sometimes difficult. This is undoubtedly because persons
successful in sports, music, acting and literature, etc.
show a mixture of both qualities, talent being innate while
expertise is acquired. Sometimes we would also wish that
talented individuals would apply themselves to becoming
experts, which would allow them to achieve a higher degree
of excellence.
The present article provides an update on both concepts
with a view to establishing a solid base for trainers’ decisions
and interventions. Some notions on following the
progress of boys participating in sports academies are presented
from the perspective of producing well-rounded individuals
with optimal performance
Application for Authorization for Therapeutic Use of Beta-Adrenergic Agonists and Inhaled Corticosteroids in Athletes with Asthma
No full textLa solicitud de autorización de uso terapéutico para agonistas betaadrenérgicos y corticoides inhalados en el deportista con asma
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