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The article presents a study on the effects of heavy resistance training on the relationship between power loss and surface electromyography (sEMG) indices and blood metabolite concentrations on dynamic exercise-induced fatigue with the same relative load, as in pretraining. It is said that association between EMG variables and manifestation of muscle fatigue during exercises have been related to the increase in surface spectrum to lower frequencies. It mentions that several attempts have been made to develop models that associate changes in sEMG. It also compares the track acute exercise-induced changes in muscle power output using sEMG variables and blood metabolite concentrations.

The article presents a meta-analysis on the influence of resistance exercise (RE) on lean body mass (LBM) in older people. According to the authors, there are few published accounts that examine the overall benefit of RE for LBM while considering a continuum of dosage schemes and age ranges. It highlights the term, sarcopenia, which plays a principal role in the pathogenesis of frailty and functional impairment among the aged. It also mentions that the qualitative study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis recommendations.

The article presents a study on the functional performance of people with chronic obstructive pulmonary disease (COPD) and its rate of decline. It is said that functional performance is the activities people choose to carry out on a daily basis. According to the authors, a better understanding on the declining rate of functional performance may be useful in guiding the development of targeted interventions to address the most salient modifiable factors. The study also examines the contribution of disease severity, body composition, symptoms and functional capacity towards the decline of functional performance.

The article presents a study which aims to examine potential of trekking poles in maintaining muscle function and reducing muscle damage after a day's mountain trekking. It demonstrates that trekking poles lessen rate of perceived exertion (RPE) in mountain ascent and decrease the degree of muscle damage after a day's mountain walking and reduce the potential for a subsequent injury. Moreover, such findings have a great application for exercise enthusiasts who wish to get involve in activities that require the persistence of a greater muscle function.

The article presents a study concerning the effects of chronic eccentric against concentric exercise on muscle physiology and blood biochemistry. The study involved 20 women who performed eccentric and concentric exercises once a week for 8 weeks and whose muscle function, body fat, resting energy expenditure (REE), lipid, carbohydrate oxidation rate, and blood chemistry measurements were evaluated. It cites that acute eccentric exercise induced REE and fat oxidation at weeks 1 and 8, blood lipid and lipoprotein profile at weeks 1 and 8, and insulin resistance at week 1 but not at week 8. It states that chronic eccentric exercise induced resting REE and fat oxidation at week 8 than with week 1 and resting blood lipid profile at week 8, but decreased resting insulin resistance at week 8.

The article presents a study on the activity of ubiquitin-proteasome pathway and markers of endoplasmic reticulum (ER) stress in response to a 200-kilometer (km) run. The study aims to investigate whether a 200-km run modulates signaling pathways implicated in cellular stress in skeletal muscle. The Western blot analysis or quantitative real-time polymerase chain reaction have been used to assay mitogen-activated protein kinase, inflammation, and oxidative stress markers, as well as, ER stress and ubiquitin-proteasome pathway. Moreover, the fluorimetric assay has been used to measure chymotrypsin-like activity. The 200-km run activates the expression of ubiquitin ligases muscle-specific RING finger 1, muscle atrophy F-box and various cellular stresses in the skeletal muscle.

The article discusses the molecular signals that will determine the integrative response of a heat-acclimated phenotype in Jerusalem. It states that the functional complexity of an adaptive response and phenotypes can be analyzed and understood through the use of an unbiased approach such as the global genomic and proteomic tools that allow the simultaneous analyzing of processes at the levels of transcriptome and proteome. It also mentions that applying the concept of thermoregulation in conditions including heat stress, heat acclimation, and heat acclimation combined with training can affirm the stress specificity of gene expression during phenotypic adaptations.

The article discusses the study on skeletal muscle properties of patients with rheumatoid arthritis (RA), which aims to search for the physiological muscle property of a community population with a stable RA. It states that patients with stable RA were assessed using methods including vastus lateralis (VL) force, physiological cross-sectional area (PCSA), and voluntary muscle activation capacity. It also mentions that the physiological properties of a muscle that establishes specific force was not determined in patients with RA despite the lack of physical functions.

The article presents a research study which seeks to determine the relationship between quadriceps central activation ratios (CARs) derived from transcranial magnetic stimulation and percutaneous electrical stimulation. It notes that reliability, relationships and agreements were assessed at 14 and 28 days for both methods using Bland-Altman plots and intraclass correlation coefficients. It claims that both methods are interchangeable measurements for evaluating volitional quadriceps activation.

The article presents a study on the difference between the landing techniques of asymptomatic athletes with patellar tendon ultrasonographic abnormality (PTA) on those with normal patellar tendons. It says that seven athletes who have no previous records of patellar tendon injury and PTA were compared to those who have normal patellar tendons wherein they performed stop-jump task. Results show the difference on the landing strategies between the two groups in which athletes with PTA made the same patellar tendon loading with altered sequencing due to greater knee flexion and extension of their hips. It suggests that the important part in the growth of PTA and patellar tendinopathy may be due to loading patterns.

The article focuses on the study that examines the influence of training with low muscle glycogen in the fat metabolism, exercise performance, and skeletal muscle adaptation of well-trained cyclists. It states that the study was performed among 14 well-trained cyclists who were subjected to nine aerobic training (AT) and nine high-intensity interval training (HIT) sessions within three weeks. It reveals that training with low muscle glycogen decreased the training intensity of cyclists. It adds that the study indicates the rise in fat oxidation after training with low muscle glycogen. Moreover, training with high muscle glycogen did not increase triacylglycerol (TG) use.

The article presents a study which examines the relationship of myostatin to the insulin resistance of obese people. The study uses the quantification of myostatin protein in muscle and plasma of 10 insulin-resistant middle-aged men. It states that the quantification in 10 men was made before and after six months of moderate aerobic exercise training, wherein the exercise modes include cycle ergometer, treadmill, and elliptical training. The study shows that the levels of myostatin protein were presented to have an increase in the muscle compared to the matching plasma samples carried with the aerobic exercise. It mentions that a cause-effect relationship has been demonstrated by the strong correlation between the plasma myostatin levels and the insulin sensitivity.

The article discusses the research on electromyographic examination of muscle activations. It mentions that the study aims to analyze the activations of isometric core exercises. It notes that the determinations of the study prove the potentiality of the exercises to be part of a core stability program. Furthermore, the findings can also be integrated into an isometric core exercise program.

The article presents a study on the muscle activation patterns of the limb. Amputee subjects were used to determine the forearm's distinct and repeatable muscle activation patterns wherein subjects executed repetitions of different movements for the comparison of the intertrial and intermovement electromyography. It also mentions research studies that advance the technology of myoelectric prosthetic control.