جستجوی مقالات مرتبط با کلیدواژه "کوفتگی عضلانی تاخیری" در نشریات گروه "پزشکی"

Delayed-onset muscle soreness after eccentric resistance exercise, which is usually part of military training, maybe due to damage to muscle structure. Nutrition can play a critical role in muscle damage by playing a vital role in both protein synthesis and catabolism. The aim of this study was to determine the effect of four weeks of separate and concomitant leucine and taurine supplementation on delayed muscle soreness indices and muscle pain perception rate after eccentric resistance exercise in young non-trained men.

In this quasi-experimental study, 48 non-trained young men were randomly divided into four groups of taurine + leucine supplement (2 g of taurine and 0.1 g of leucine per kg of body weight per day), taurine supplement (2 g taurine per day), leucine supplement (0.1 g leucine per kg body weight per day) and placebo (1500 mg maltodextrin per day) and took supplement and placebo for four weeks. Delayed onset muscle soreness in lower body muscles developed using knee flexion with a weight equivalent to 70% of 1RM (3 sets and 15 repetitions). Serum creatinine kinase and lactate dehydrogenase enzymes were measured by photometry and muscle pain perception rate was measured using the Pain Assessment scale (PAS) at the time before, immediately after, 24, 48 and 72 hours after eccentric resistance training.

Comparison of changes in creatinine kinase activity and muscle pain perception rate showed a significant difference in different stages before and after eccentric resistance exercise (P<0.05).These changes were significant in the leucine + taurine group in the pre-test times up to 24 hours and 48 hours post-test compared to the leucine, taurine and placebo groups (P <0.05). Changes in lactate dehydrogenase activity between groups were not significant at different times.

Concomitant use of leucine and taurine supplements can reduce some of the indicators of muscle damage and muscle pain perception rate after eccentric resistance exercise.

Delayed muscle soreness in military forces is unavoidable due to the nature of their mission, and purslane extract has a significant effect on enhancing their function due to their anti-inflammatory and analgesic properties. So the purpose of the present study was investigation of the effects two consumption methods of purslane (Portulaca oleracea) on functional indicators of delayed onset muscle soreness (DOMS) after eccentric resistance exercise in military students.

Thirty active military students (age 20.4±11.4 years, weight 76.3±7.6 kg, height 176.2±5.6 cm, body mass index 24.5±1.7) were randomly divided into 3 groups include the high, low dose and placebo. The high, low dose groups received 1200 and 600 mg capsules, respectively, and the placebo group only consumed starch-containing capsules for 12 days from one week to 96 hours after eccentric resistance exercise (Squat). Delayed onset muscle soreness was established using a leg press training session, where each subject performed 4 sets presses each with 20 repetitions and 3 minutes rest between each sets with load equal to 80% of 1- isotonic maximal repetition. And 6, 24, 48, 72, 96 hours after exercise protocol, thigh circumference, thigh flexion range, talag and visual analog pain and vertical jump (Sargent jump) measured.

one session of eccentric resistance exercise significantly increased thigh circumference, talag pain, analog pain and decreased function. There was a significant difference between the performance indices in the six stages measured before and after the eccentric resistance exercise in the three groups (P <0.05). Also, administration of high-dose purslane (1200 mg) significantly decreased talag pain variables, significant increase in sargent jump record (P <0.05), and low-dose purslane (600 mg) significantly reduced visual pain (P <0/05) and with regard to thigh circumference and thigh flexion range, the dose of purslane did not have a significant effect.

Overall, our study showed that the dose of purslane (1200 or 600 mg) in the military affects DOMS-influenced performance factors following an eccentric resistance exercise session. However, further research is needed to clarify this issue.

Using nutritional supplements is proposed to avoid the stresses-induced by physical activity, delayed fatigue, and maintenance of performance during competition. The aim of this study was to explore the effect of 6 weeks of watermelon juice supplementation on the activity of CK and LDH enzymes and exercise performance in elite female taekwondo athletes.

The population of this quasi-experimental are 25 elite females that were selected by available sampling methods and then were randomly divided into two groups of supplementation (n=15) and placebo (n=10). One hour before Taekwondo training, in the treatment group, subjects consumed 500 ml of watermelon juice (almost containing 1.17 gr of L-Citrulline) for 6 weeks while the control group received placebo. Taekwondo training was held for ninety minutes, three sessions per week for 6 weeks. CK, LDH levels, and exercise performance test (VO2max) were measured in both groups before and after the study and the muscle soreness was measured 24 and 47 hours after the exercise.

The results showed that watermelon juice supplementation for 6 weeks reduced CK (P=0.001) and LDH (P=0.002), decreased muscle soreness 24 hours (P=0.001) and 47 hours (P=0.001) after exercise and increased exercise performance (P=0.001). Significant differences between the experimental group and the control group with regard to these variables were observed.

According to the findings of this study, it can be concluded that watermelon juice supplementation before the exercise is effective in preventing delayed muscle soreness and athlete's performance.

Delayed onset muscle soreness (DOMS) is a common experience after unusual activities (particularly eccentric exercises). The aim of the present study was to investigate the effect of short-term consumption of CoQ10 supplement on DOMS in athletic and nonathletic boys aged 15 to 17 years.

Twenty athletic and non-athletic boys who had no muscle soreness history in previous six months, voluntarily participated in this study and were assigned into two groups of 10 athletic and 10 non-athletic boys. Physical activity program for DOMS was 70 forearm eccentric contractions. Duration of every contraction was 3 seconds and between two contractions they rest for 10 seconds. Also, they had one minute rest between every 10 contractions. Dependent variables (LD H and CK) at baseline (before) and 48h after exercise soreness were measured. For data analysis ANOVA with repeated measure was used and p ≤ 0.05 was considered as significant.

Delayed soreness was investigated by measuring the biochemical changes of studied enzymes and self-report factors (i.e. muscle strength, fatigue, and stinging pain). Statistical analysis showed that there were no significant changes in LDH and CK levels of athletic and non-athletic groups (p ≤ 0.05). Both groups’ verbal representation showed that the short term consumption of CoQ10 yields reduction of muscle pain, stinging and fatigue.

Short term consumption of CoQ10 supplement reduces the levels of main markers of DOMS and muscle pain and fatigue, but this decrease was not significant.