Showing 6 results for Resistance Exercise
Azadeh Najarzadeh, Hadi Atarod, Hasan Mozaffari-Khosravi, Ali Dehghani, Foad Asjodi,
Volume 18, Issue 4 (7-2015)
Abstract
Background: Delayed muscular soreness after resistance exercises or eccentric trainings is probably because of muscle damage and injury. Nutrition by playing a crucial role in both protein synthesize and catabolism can influence the extent of muscle injury. The objective of this study was to assess the effect of single portion of Glutamine supplement consumption on injury indices of muscle after a session eccentric resistance exercise.
Materials and Methods: This study used a randomized, double blind design that consisted of 80 volvnteer non-athletic males (aged 22.2±2.2 years, height 175±5 cm, weight 71.64±9 kg, body mass index 23.2±2.2 kg/m2, and body fat 17.5±2.4%). A total of 40 participants were divided randomly into 2 groups, supplement group (receiving 0.1 g/kg Body weight/day Glutamine) and placebo group (receiving 0.1 g/kg Body weight/day Maltodextrin). Serum keratine kinase (CK) was determined by photometric method, muscle pain and knee joint range of motion were measured using, respectively, a standard scale of PAS and goniometer before, 24 and 48 hours after a resistance test involving knee flexion.
Results: Glutamine supplement consumption caused no significant differences in CK levels reduction in none of the measured times, but it reduced the muscle pain at the times of 24 and 48 hours in comparison with the placebo group. In addition, the knee joint range of motion was significantly improved at 24 hours after the test.
Conclusion: It seems that this dose of Glutamine supplementation can reduce the apparent signs apart from muscle injury indices reduction.
Foad Asjodi, Phd, Hamid Mohebi, Ebrahim Mirzajani, Azimeh Izadi,
Volume 20, Issue 4 (7-2017)
Abstract
Abstract
Background: The aim of this study was to evaluate the effects of supplementation of Branched-Chain Amino Acids (BCAAs) plus carbohydrate (CHO) and whey protein plus CHO on muscle damage indices after eccentric resistant exercise.
Materials and Methods: Twenty four untrained healthy males participated in this study. They were randomly divided into three groups, BCAA +glucose (0.1+0.1g/kg) supplement group (n=8), Whey+glucose (0.1+0.1g/kg) supplement group (n=8), and placebo (malto dextrin 0.2g/kg) group (n=8). Each subject consumed a carbohydrate beverage with addition of whey protein or branched-chain amino acid or placebo 30 minutes before exercise in a randomized,double-blind fashion. Serum levels of Creatine Kinase (CK), Lactate dehydrogenase (LDH), and muscle pain were measured before, 24, 48, 72 h after exercise. Follow-up analyses included 1-way repeated measures ANOVAs, and Bonferroni post hoc comparisons.
Results: 24 h after test, serum levels of CK, LDH and muscle pain in both supplement groups were increased less than placebo group (0.015, 0.001 and 0.001, respectively). Also, the levels of CK and LDH showed significant changes in both intervention groups compared to placebo group at 24 h (0.001, 0. 015, respectively). Similarly, significant differences in the levels of CK and LDH between groups were observed.
Conclusion: These data indicate that muscle damage and pain after resistant exercise were reduced by an ingestion of either BCAA drink or whey protein drink.
Moein Rahimi Sadegh, Amir Rashidlamir, Ali Akbar Haddad Mashhad Rizeh, Mohammad Soukhtanloo,
Volume 20, Issue 12 (3-2018)
Abstract
Abstract
Background: Recent Research has pointed to the involvement of lysyl oxidase (LOX) in the muscle development. Despite the fact, there is currently no direct evidence that lox is involved in the myogenic factors and exercise-induced hypertrophy. Therefore, the purpose of this study was to investigate the effect of lysyl oxidase inhibition on exercise-induced hypertrophy, as well as the gene expression of MyoD1, myogenin, TGF-β and LOX in FHL muscle of wistar rats.
Material and Methods: In this experimental research, 32 male Wister rats with an average weight of 220±15 were divided into four groups: resistance training, normal control, treated control and treated resistance training. Rats performed a resistance training for 8 weeks in which animals climbed a vertical ladder of 1m and inclined at 85° with weights attached to their tails. In order to inhibit lysyl oxidase, treatment group rats received daily injection of intraperitoneal β-aminopropionitrile (120 mg/kg/day). FHL muscle was extracted to measure relative muscle weight, as well as genes expression of MyoD1, myogenin, TGF-β and LOX by real time-PCR.
Results: Relative weight of FHL muscle was decreased significantly in the treated groups with BAPN, compared with normal groups (p<0.05). Lysyl oxidase showed a significant increase compared to the normal control group following a resistance training (p<0.05). LOX gene expression in treatment groups showed a significant increase compared to normal control group (p<0.05). TGF-β gene expression in BAPN-treated groups significantly was increased (p<0.05) and Myogenin in treatment groups showed a significant decrease compared to normal control groups (p<0.05). The expression of MyoD1 gene in treatment groups was only decreased significantly in the treated control groups compared to normal control groups (p<0.05).
Conclusion: Results showed that inhibiting the lysine oxidase enzyme could affect the genes involved in hypertrophy and reduce the hypertrophy induced by resistance training.
Mehdi Rostamizadeh, Alireza Elmieh, Farhad Rahmani Nia,
Volume 22, Issue 1 (4-2019)
Abstract
Background and Aim: Physical activity causes the releases of bone resorption indices in the bloodstream by the mechanical load on bone, which in interaction with adipokines reduces obesity and prevent its complications. So, the present study aims to compare the effects of aerobic and resistance exercise on Anthropometric Indices and osteocalcin, leptin, adiponectin levels in overweight men.
Materials and Methods: A total of 40 overweight young healthy men (BMI 28.67±0.96 and age 31.50 ± 2.23) were randomly assigned to control (n = 14), aerobic exercise (n = 13) and resistance exercise (n = 13) groups. Subjects in the exercise group were on 8-week supervised exercise training programme for three sessions per week (aerobic exercise were performed at 60-85% of HRR, and resistance exercise were performed at 55-75% of 1RM). Osteocalcin and adipocytokines (leptin, adiponectin) were assessed from fasting blood samples before and after the 8-week exercise programme. Data were analyzed by t-test and ANOVA.
Ethical Considerations: This study with research ethics code IR.IAU.RASHT.REC.1396.124 has been approved by research ethics committee at Islamic Azad University, Rasht branch, Iran and also has been registered with code IRCT20180226038876N1 at Iranian Registry of Clinical Trials (IRCT).
Findings: Aerobic and resistance training led to decrease in anthropometric indices (p<0.05), leptin levels (p<0.001, p=0.001) and increase in osteocalcin (p=0.001, p<0.001) and adiponectin (p=0.001, p<0.001), respectively. In addition, the difference between the two training groups was not statistically significant (p>0.05).
Conclusion: Considering to the effects of aerobic and resistance exercise on osteocalcin and adipocytokines level, it seems that both exercise methods can be increasing mechanical load on bone mass and cause to change in energy metabolism and body weight and can be an important factor in decrease of obesity complications.
Mohammad Parastesh, Jalil Moradi,
Volume 23, Issue 5 (11-2020)
Abstract
Background and Aim: Coronavirus Disease 2019 (COVID-19) pandemic has reduced the physical activity of people worldwide. The purpose of this study is to provide a practical guide for performing physical activities at home during the COVID-19 pandemic.
Methods & Materials: The study was conducted by using library method and reviewing the books and articles on home-based physical activity, to provide a scientific basis for performing physical activity at home. In this regard, various physical activities with and without equipment at homes were examined.
Ethical Considerations: This article is a review article with no human or animal sample.
Results: Home-based practical suggestions for staying active and cope with its physical and psychological consequences of the COVID-19 pandemic were reported walking or running on a treadmill, the use of stationary bikes, and body weight resistance exercise, in addition to aerobic exercise.
Conclusion: This proposed physical activity programs can be used during the pandemic at home by people with sedentary lifestyle.
Heshmatallah Alikarami, Saeedeh Tahmasebi, Mohammad Fathi, Raziyeh Rezaei,
Volume 26, Issue 6 (2-2024)
Abstract
Abstract
Introduction: Resistance training (RT) is an important part of athletes' preparation exercises with the aim of strengthening physical fitness, creating neuro-muscular adaptations and improving sports performance. The aim of this study was to investigate the effect of resistance training with weight on NCV of tibial and peroneal nerves, muscle strength, agility, flexibility and performance of half-back, half-turn and angel balance skills in seven- to ten-year-old gymnasts.
Methods: In this semi-experimental study, 24 children with two years of experience in gymnastics (age: 8.5±1.5 years, weight: 32.10±9.40 kg, height: 135±13 cm) voluntarily Participated. Subjects were randomly divided into two groups including gymnastics training and gymnastics training + resistance training with weights. And they trained for 10 weeks. During the research, one group did general gymnastics exercises, and the other group did resistance training with weights three times a week in addition to gymnastics exercises. Before and after the exercises, NCV test, Sargent's jump muscle power tests, agility of 9x4m back-and-forth run, Wells' flexibility, and performing half-back, half-turn and balance skills of Angel were performed. Independent t-test was used to analyze the data. And a significance level of P<0.05 was considered.
Results: The results showed that the NCV in the tibial and peroneal nerves increased significantly in the weight resistance training group compared to the general gymnastics training group. Also, muscle strength in Sargent's jump, agility in 4x9m back and forth running, and the performance of half-back and half-turn skills increased significantly (P<0.05). However, no significant change was observed in the flexibility with the Wells test (P=0.870) and execution of Angel's balance skill (P=0.552).
conclusion: 10 weeks of resistance training with weights significantly increases neuromuscular adaptations, NCV, muscle power, agility, and implementation of half-back and half-varus skills in gymnast children. Therefore, it is suggested to use resistance exercises with weights to improve the performance of children athletes in the field of gymnastics and fields where nerve conduction speed, muscle power and agility are effective in the success of athletes.
