Changes in maximal voluntary isometric contraction strength (MVC) and muscle soreness, plasma creatine kinase (CK) activity and myoglobin concentration after 80% EC were compared between groups by a mixed-factor ANOVA.
Countermovement vertical jump (CMJ) performance, perceived muscle soreness, sit-and-reach flexibility, plasma creatine kinase (CK), lactate dehydrogenase (LDH), and myoglobin (Mb) concentrations were quantified immediately before and after and 45 minutes, 24 and 48 hours after repeated-sprint running protocols.
At the end of the race, jump height reduction (-11±12% vs. -25±19%; P=0.03), serum myoglobin concentration (186.1±93.6 vs. 564.1±370.7 µg·mL-1; P<0.01) and self-reported muscle pain (3.0 ±2.3 vs. 5.5 ±1.0 A.U.; P<0.01) were lower in half-marathoners vs. marathoners.
Enrichment juices maintained basal levels of blood markers of muscle damage, such as lactate dehydrogenase and myoglobin, and showed a significant maintenance of force during the exercise and a significant decrease in the rating of perceived exertion and muscle soreness after exercise.