scholarly journals Why Does Deoxygenation of the Vastus Lateralis Muscle Attenuate at High Intensity?

2012 ◽  
Vol 52 (February) ◽  
pp. 103-107
Author(s):  
Takuya Osawa ◽  
Ryotaro Kime ◽  
Takafumi Hamaoka ◽  
Masayoshi Yamamoto ◽  
Toshihito Katsumura
Keyword(s):  
High Intensity ◽  
Vastus Lateralis ◽  
Vastus Lateralis Muscle ◽  
Lateralis Muscle

Buffering capacity of deproteinized human vastus lateralis muscle

1985 ◽  
Vol 58 (1) ◽  
pp. 14-17 ◽  
Author(s):  
W. S. Parkhouse ◽  
D. C. McKenzie ◽  
P. W. Hochachka ◽  
W. K. Ovalle
Keyword(s):  
High Intensity ◽  
Buffer Capacity ◽  
Vastus Lateralis ◽  
Staining Intensity ◽  
Vastus Lateralis Muscle ◽  
Lateralis Muscle ◽  
Ph Range ◽  
Buffer Capacities ◽  
Fast Twitch

The in vitro deproteinized vastus lateralis muscle buffer capacity, carnosine, and histidine levels were examined in 20 men from 4 distinct populations (5 sprinters, 800-m runners; 5 rowers; 5 marathoners; 5 untrained). Needle biopsies were obtained at rest from the vastus lateralis muscle. The buffer capacity was determined in deproteinized homogenates by repeatedly titrating supernatant extracts over the pH range of 7.0–6.0 with 0.01 N HCl. Carnosine and histidine levels were determined on an amino acid AutoAnalyzer. Fast-twitch fiber percentage was determined by staining intensity of myosin adenosinetriphosphatase. High-intensity running performance was assessed on an inclined treadmill run to fatigue (20% incline; 3.5 m X s-1). Significantly (P less than 0.01) elevated buffer capacities, carnosine levels, and high-intensity running performances were demonstrated by the sprinters and rowers, but no significant differences existed between these variables for the marathoners vs. untrained subjects. Low but significant (P less than 0.05) interrelationships were demonstrated between buffer capacity, carnosine levels, and fast-twitch fiber composition. These findings indicate that the sprinters and rowers possess elevated buffering capabilities and carnosine levels compared with marathon runners and untrained subjects.

Oxidative capacity and glycogen content increase more in arm than leg muscle in sedentary women after intense training

2015 ◽  
Vol 119 (2) ◽  
pp. 116-123 ◽  
Author(s):  
Nikolai B. Nordsborg ◽  
Luke Connolly ◽  
Pál Weihe ◽  
Enzo Iuliano ◽  
Peter Krustrup ◽  
...  
Keyword(s):  
High Intensity ◽  
Glycogen Content ◽  
Citrate Synthase ◽  
Vastus Lateralis ◽  
High Volume ◽  
Maximal Activity ◽  
Vastus Lateralis Muscle ◽  
Adaptive Potential ◽  
Lateralis Muscle ◽  
Sedentary Women

The hypothesis that the adaptive capacity is higher in human upper- than lower-body skeletal muscle was tested. Furthermore, the hypothesis that more pronounced adaptations in upper-body musculature can be achieved by “low-volume high-intensity” compared with “high-volume low-intensity” exercise training was evaluated. A group of sedentary premenopausal women aged 45 ± 6 yr (± SD) with expected high adaptive potential in both upper- and lower-extremity muscle groups participated. After random allocation to high-intensity swimming (HIS, n = 21), moderate-intensity swimming (MOS, n = 21), soccer (SOC, n = 21) or a nontraining control group (CON, n = 20), the training groups completed three workouts per week for 15 wk. Resting muscle biopsies were obtained from the vastus lateralis muscle and deltoideus muscle before and after the intervention. After the training intervention, a larger ( P < 0.05) increase existed in deltoideus muscle of the HIS group compared with vastus lateralis muscle of the SOC group for citrate synthase maximal activity (95 ± 89 vs. 27 ± 34%), citrate synthase protein expression (100 ± 29 vs. 31 ± 44%), 3-hydroxyacyl-CoA dehydrogenase maximal activity (35 ± 43 vs. 3 ± 25%), muscle glycogen content (63 ± 76 vs. 20 ± 51%), and expression of mitochondrial complex II, III, and IV. Additionally, HIS caused higher ( P < 0.05) increases than MOS in deltoideus muscle citrate synthase maximal activity, citrate synthase protein expression, and muscle glycogen content. In conclusion, the deltoideus muscle has a higher adaptive potential than the vastus lateralis muscle in sedentary women, and “high-intensity low-volume” training is a more efficient regime than “low-intensity high-volume” training for increasing the aerobic capacity of the deltoideus muscle.

scholarly journals The Comparison of Eight Weeks of HIIT and BFR on Mitochondrial Biogenesis and Angiogenesis Markers in Vastus Lateralis Muscle of Amateur Male Runners

2021 ◽  
Vol 10 (3) ◽  
pp. 424-435
Author(s):  
Seyyed Yaser Alavi ◽  
◽  
Shadmehr Mirdar ◽  
Keyword(s):  
Mitochondrial Biogenesis ◽  
High Intensity ◽  
Vastus Lateralis ◽  
Interval Training ◽  
Analysis Of Covariance ◽  
Immunohistochemical Method ◽  
Vastus Lateralis Muscle ◽  
High Intensity Interval Training ◽  
Lateralis Muscle ◽  
High Intensity Interval

Background and Aims Post-exercise Blood Flow Restriction (BFR) is a novel training method that, through alterations to the haemodynamic, metabolic, and hypoxic stimulus, could augment skeletal muscle adaptation in endurance-trained individuals. This study aimed to compare the effect of eight weeks of High-Intensity Interval Training (HIIT) and BFR on PGC-1α and Vascular Endothelial Growth Factor (VEGF) as mitochondrial biogenesis and angiogenesis biomarkers, respectively, in amateur male runners. Methods In the current study, 15 runners (Meas±SD of age: 23±3 years; height: 172±5 cm; weight: 73±4 kg: BMI: 23±1.7 kg/m2) voluntarily participating in this study were divided into three groups: 1-Control 2-HIIT and 3-HIIT+BFR or BFR. The experimental groups performed three sessions a week (six trials each session) for eight weeks. The biopsy samples were collected from the vastus lateralis muscle at the first and end of eight weeks. The protein expression levels of the PGC-1α and VEGF were studied by immunohistochemical method. Data analysis was performed using the one-way Analysis of Covariance (ANCOVA), and a significance level of P<0.05 was considered. Results The findings showed that PGC-1α values were significantly increased in the HIIT and BFR groups (54.9% and 60.85%, respectively) compared to the control group, as well as VEGF levels were 51.31% and 57.52%, respectively (P<0.05). There were also significant differences between experimental groups in the protein expressions (P<0.05). Conclusion Given that activation of VEGF from the PGC-1 pathway is part of cellular-molecular mechanisms of high-intensity interval training, It seems that the combination of intense interval training and BFR can effectively affect the process of angiogenesis in the vastus lateralis muscle of amateur runners.

Ayurvedic management of Myositis Ossificans of Vastus Lateralis Muscle (Urusthamba) - A Case Study

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Vishnu Mohan ◽  
Gopikrishna BJ ◽  
Avnish Pathak ◽  
Mahesh Kumar ES ◽  
Duradundi G
Keyword(s):  
Heterotopic Ossification ◽  
Myositis Ossificans ◽  
Vastus Lateralis ◽  
Treatment Protocol ◽  
Vastus Lateralis Muscle ◽  
Satisfactory Treatment ◽  
Lateralis Muscle ◽  
Ayurvedic Treatment

Myositis ossificansis characterized by heterotopic ossification (calcification) of muscle of various etiologies. It is most commonly affected in the quadriceps of the thighs. There are many tools available for diagnosis of Myositis ossificans, but lack of satisfactory treatment. So the development of a treatment protocol for Myositis ossificans is the need of today`s era. In Ayurveda, the same can be understood as Urusthamba. The present paper discusses a case of Myositis ossificans of right vastus lateralis muscle and its Ayurvedic treatment.

scholarly journals Non-Coding RNAs in the Transcriptional Network That Differentiates Skeletal Muscles of Sedentary from Long-Term Endurance- and Resistance-Trained Elderly

2021 ◽  
Vol 22 (4) ◽  
pp. 1539
Author(s):  
Paola De Sanctis ◽  
Giuseppe Filardo ◽  
Provvidenza Maria Abruzzo ◽  
Annalisa Astolfi ◽  
Alessandra Bolotta ◽  
...  
Keyword(s):  
Exercise Training ◽  
High Intensity ◽  
Vastus Lateralis ◽  
Mammalian Target Of Rapamycin ◽  
Differentially Expressed ◽  
Transcriptional Networks ◽  
Vastus Lateralis Muscle ◽  
Age Related ◽  
Wide Range ◽  
Non Coding Rnas

In a previous study, the whole transcriptome of the vastus lateralis muscle from sedentary elderly and from age-matched athletes with an exceptional record of high-intensity, life-long exercise training was compared—the two groups representing the two extremes on a physical activity scale. Exercise training enabled the skeletal muscle to counteract age-related sarcopenia by inducing a wide range of adaptations, sustained by the expression of protein-coding genes involved in energy handling, proteostasis, cytoskeletal organization, inflammation control, and cellular senescence. Building on the previous study, we examined here the network of non-coding RNAs participating in the orchestration of gene expression and identified differentially expressed micro- and long-non-coding RNAs and some of their possible targets and roles. Unsupervised hierarchical clustering analyses of all non-coding RNAs were able to discriminate between sedentary and trained individuals, regardless of the exercise typology. Validated targets of differentially expressed miRNA were grouped by KEGG analysis, which pointed to functional areas involved in cell cycle, cytoskeletal control, longevity, and many signaling pathways, including AMP-activated protein kinase (AMPK) and mammalian target of rapamycin (mTOR), which had been shown to be pivotal in the modulation of the effects of high-intensity, life-long exercise training. The analysis of differentially expressed long-non-coding RNAs identified transcriptional networks, involving lncRNAs, miRNAs and mRNAs, affecting processes in line with the beneficial role of exercise training.

Vastus lateralis muscle volume prediction in early-adolescent boys

2021 ◽  
pp. 110735
Author(s):  
Theresa Domroes ◽  
Gunnar Laube ◽  
Sebastian Bohm ◽  
Adamantios Arampatzis ◽  
Falk Mersmann
Keyword(s):  
Vastus Lateralis ◽  
Muscle Volume ◽  
Early Adolescent ◽  
Vastus Lateralis Muscle ◽  
Adolescent Boys ◽  
Lateralis Muscle
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