scholarly journals Associations among the reproducibility of anterior central femoral muscle/fat thickness, femoral circumference, and anterior femoral muscle hardness measurement and knee extension muscle strength

2018 ◽  
Vol 8 (2) ◽  
pp. 85-89
Author(s):  
Saki Kobayashi ◽  
Akari Torawaka ◽  
Koji Nonaka ◽  
Teppei Abiko ◽  
Kayoko Shiraiwa ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Hardness Measurement ◽  
Knee Extension ◽  
Muscle Hardness ◽  
Femoral Muscle ◽  
Fat Thickness

Compensatory muscle fiber hypertrophy in elderly men

1992 ◽  
Vol 73 (3) ◽  
pp. 812-816 ◽  
Author(s):  
A. Aniansson ◽  
G. Grimby ◽  
M. Hedberg
Keyword(s):  
Muscle Strength ◽  
Muscle Fiber ◽  
Citrate Synthase ◽  
Biceps Brachii ◽  
Vastus Lateralis ◽  
Cell Mass ◽  
Knee Extension ◽  
Type I ◽  
Type Ii ◽  
Elderly Men

Muscle strength and muscle morphology have been studied three times during a period of 11 yr in nine elderly men. On the last occasion the average age was 80.4 (range 79–82) yr. Body cell mass decreased by 6% and muscle strength for knee extension, measured by means of isometric and concentric isokinetic (30–60 degrees/s) recordings, declined by 25–35% over the 11-yr period. Between 76 and 80 yr of age only the isokinetic strength for 30 degrees/s decreased significantly. Muscle fiber composition in the vastus lateralis did not change between 69 and 76 yr of age, but there was a significant reduction in the proportion of type IIb fibers from 76 to 80 yr. The decrease in type II fiber areas was not significant between 69 and 76 yr of age (as in a larger sample from the same population), but a significant increase in both type I and type II fiber areas was recorded from 76 to 80 yr of age and biceps brachii showed similar tendencies. In the same period, the enzymatic activities of myokinase and lactate dehydrogenase subsided in the vastus lateralis, but there was no change for triose phosphate dehydrogenase, 3-hydroxy-CoA-dehydrogenase, and citrate synthase. The muscle fiber hypertrophy in this group of elderly men with maintained physical activity between 76 and 80 yr of age is interpreted as a compensatory adaptation for the loss of motor units. In addition, the adaptation with respect to oxidative capacities seems to be maintained at this age.

scholarly journals Muscle Strength Variations of Knee Joint Muscles in Elite Female Handball Players after Pre-Season Conditioning

2018 ◽  
Vol 63 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Zuzana Gonosova ◽  
Petr Stastny ◽  
Jan Belka ◽  
Lucia Bizovska ◽  
Michal Lehnert
Keyword(s):  
Muscle Strength ◽  
Elite Athletes ◽  
Body Height ◽  
Peak Torque ◽  
Knee Extension ◽  
Training Process ◽  
Strength Performance ◽  
Risk Of Injury ◽  
Previous Season ◽  
Isokinetic Peak Torque

Abstract Monitoring seasonal variations in strength performance and the relative risk of injury indicators related to strength of hamstring (H) and quadriceps (Q) in female elite athletes is beneficial for the training process. The aim of this study was to examine and compare the level of muscle strength, the conventional ratio (HCONC/QCONC) as well as two functional and strength ratios reflecting the movement of knee extension (HECC/QCONC) and flexion (HCONC/QECC), and the bilateral percentage strength deficit (BSD) in elite female handball players. The concentric and eccentric isokinetic peak torque was measured at an angular velocity of 60°/s on three occasions (in-season cessation, 4 weeks of rest followed by 4 weeks of individual conditioning and 6 weeks of group conditioning) in eleven female handball players (age: 23.1 ± 3.5 years, body height: 1.73 ± 0.6 m). According to ANOVA results, the BSD of H muscles in the concentric mode decreased between the in-season cessation and the end of the pre-season, and HCONC/QCONC increased at the beginning of the pre-season and at the end of the pre-season in comparison with inseason cessation measurement. The effect size analyses showed that the off-season rest followed by 10 weeks of the conditioning programme increased Q and H strength in comparison with the previous season with a large effect. Coaches should include progressive conditioning in the pre-season phase to decrease the bilateral strength deficit and to support further conditioning development.

scholarly journals GAMBARAN KEKUATAN OTOT PADA LANSIA DI BPLU SENJA CERAH PANIKI BAWAH

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Prisilia M. Pinontoan ◽  
Sylvia R. Marunduh ◽  
Herlina I. S. Wungouw
Keyword(s):  
Muscle Strength ◽  
Elderly Women ◽  
Elbow Flexion ◽  
Knee Extension ◽  
Shoulder Abduction ◽  
Elderly Men ◽  
Cross Sectional ◽  
Purposive Sampling ◽  
Shoulder Flexion ◽  
Cross Sectional Design

Abstract: The aim of this study was to find out the profile of muscle strength on elderly at BPLU Senja Cerah Paniki Bawah. This was a descriptive study with cross sectional design. There were 26 respondents who met the inclusion criteria, consisted of 10 elderly men and 16 elderly women. Respondents were selected by using purposive sampling method. The measurements of the muscle strength were done by using 1 RM method while doing elbow flexion, elbow extension, shoulder flexion, shoulder extension, shoulder abduction, knee flexion, knee extension and dorsoflexion. Data were analyzed manually and computerized then presented in tabular form. The result shows that the average muscle strength in elderly men were greater than women and the average muscle strength of respondents that were included in the age group 60-79 years old were greater than those in 80-99 years.Keywords: muscle strength, elderly.1 RMAbstrak: Tujuan dari penelitian ini yaitu untuk mengetahui gambaran kekuatan otot pada Lansia di BPLU Senja Cerah Paniki Bawah. Penelitian ini merupakan peneliltian deskriptif dengan rancangan potong lintang. Responden yang memenuhi kriteria inklusi terdiri dari 26 orang yang terdiri dari 10 orang laki-laki dan 16 orang perempuan. Sampel dipilih menggunakan cara purposive sampling. Kekuatan otot pada lansia diukur dengan menggunakan metode 1 RM yang diukur pada gerakan fleksi siku, ekstensi siku, fleksi bahu, ekstensi bahu, abduksi bahu, fleksi lutut, ekstensi lutut serta dorsofleksi. Data yang sudah didapatkan kemudian dikumpul dan diolah secara manual dan komputerisasi serta disajikan dalam bentuk tabel. Hasil penelitian menunjukkan rerata kekuatan otot responden laki-laki lebih besar dibanding perempuan dan rerata kekuatan responden yang termasuk dalam kelompok umur 60-79 tahun lebih besar dibanding kelompok umur 80-99 tahun.Kata kunci: kekuatan otot, lansia, 1 RM.

MUSCLE STRENGTH AS A PREDICTOR OF GAIT VARIABILITY AFTER TWO YEARS IN COMMUNITY-LIVING OLDER ADULTS

2019 ◽  
pp. 1-7
Author(s):  
B. Bogen ◽  
R. Moe-Nilssen ◽  
M.K. Aaslund ◽  
A.H. Ranhoff
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Inertial Sensors ◽  
Cognitive Task ◽  
Knee Extension ◽  
Gait Variability ◽  
Community Dwelling ◽  
Uneven Surface ◽  
Fast Speed ◽  
Z Scores

Background: Stride-to-stride fluctuations, or gait variability, can be captured easily using body worn inertial sensors. Previously, sensor-measured gait variability has been found to be associated with fall risk and central nervous changes. However, further research is needed to clarify the clinical relevance of this method. Objectives: In this study, we look at how gait variability is associated with muscle strength, measured two years earlier. Design, setting and participants: This is study of longitudinal associations. Participants were community-dwelling volunteers between 70-81 years. Measurements: Participants were tested while walking with a single sensor at their lower back, and they walked back and forth over a distance of 6.5 meters under four conditions: at preferred speed, at fast speed, with an added cognitive task, and while walking across an uneven surface. Gait variability in the anteroposterior (AP), mediolateral (ML) and vertical (V) directions was identified. A muscle strength score was composed by transforming hand grip strength, isometric knee extension strength and the 30 second chair rise-test to z-scores and adding them. Results: 56 individuals were analysed (mean age at baseline 75.8 (SD 3.43), 60 percent women). In a backwards regression method using age, gender and baseline walking speed as covariates, muscle strength predicted gait variability after two years for AP variability during preferred speed (Beta= .314, p=.025) and uneven surface walking (Beta=.326, p=.018). Further, muscle strength was associated with ML variability during preferred speed (Beta=.364, p=.048) and fast speed (Beta=.419, p=.042), and V variability during preferred speed (Beta=.402, p=.002), fast speed (Beta=.394, p=.004) and uneven surface walking (Beta=.369, p=.004). Conclusions: Sensor-measured gait variability tended to be associated with muscle strength measured two years earlier. This finding could emphasize the relevance of this relatively novel measure of gait in older adults for both research and clinical practice.

Relationship Between Muscle Strength Asymmetry and Body Sway in Older Adults

2018 ◽  
Vol 26 (3) ◽  
pp. 457-461 ◽  
Author(s):  
Hitoshi Koda ◽  
Yoshihiro Kai ◽  
Shin Murata ◽  
Hironori Osugi ◽  
Kunihiko Anami ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Grip Strength ◽  
Knee Extension ◽  
Body Sway ◽  
Adult Women ◽  
Gait Stability ◽  
Cutoff Value ◽  
Hand Grip ◽  
Strength Asymmetry ◽  
The Relationship

The purpose of this study was to investigate the relationship between muscle strength asymmetry and body sway while walking. We studied 63 older adult women. Strong side and weak side of knee extension strength, toe grip strength, hand grip strength, and body sway while walking were measured. The relationship between muscle strength asymmetry for each muscle and body sway while walking was evaluated using Pearson’s correlation coefficient. Regarding the muscles recognized to have significant correlation with body sway, the asymmetry cutoff value causing an increased sway was calculated. Toe grip strength asymmetry was significantly correlated with body sway. Toe grip strength asymmetry causing an increased body sway had a cutoff value of 23.5%. Our findings suggest toe grip strength asymmetry may be a target for improving gait stability.

Testing of knee extension muscle strength: A comparison of two portable alternatives for the NIH toolbox study

2011 ◽  
Vol 19 (3) ◽  
pp. 163-168 ◽  
Author(s):  
Ying-Chih Wang ◽  
Richard W. Bohannon ◽  
Susan R. Magasi ◽  
Beata Hrynkiewicz ◽  
Aaron Morales ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Knee Extension

scholarly journals Effect of vitamin D fortified foods on bone markers and muscle strength in women of Pakistani and Danish origin living in Denmark: a randomised controlled trial

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Ida M. Grønborg ◽  
Inge Tetens ◽  
Elisabeth Wreford Andersen ◽  
Michael Kristensen ◽  
Rikke E. K. Larsen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Muscle Strength ◽  
Bone Turnover ◽  
Bone Turnover Markers ◽  
Bone Markers ◽  
Knee Extension ◽  
Fortified Foods ◽  
Knee Extension Strength ◽  
Turnover Markers

Abstract Background Deficient and insufficient vitamin D status (defined as serum 25(OH)D < 30 nmol/L and > 50 nmol/L) is prevalent worldwide and associated with decreased muscle strength and poor bone health. We aimed to investigate the effect of vitamin D fortification on bone markers and muscle strength among younger adult women at risk of vitamin D deficiency. Methods A 12-week randomised double-blinded placebo-controlled winter intervention trial, providing 30 μg vitamin D3/day through fortified yoghurt, cheese, eggs and crisp-bread or similar placebo products. Participants were 143 women of Danish and Pakistani origin 18–50 years of age, living in Denmark, randomised into four groups stratified by ethnicity. Serum 25-hydroxyvitamin D (25(OH)D) by LC-MS/MS and the secondary endpoints: four specific bone markers (osteocalcin (OC), Bone specific Alkaline Phosphatase (BALP), Procollagen type 1 amino-terminal propeptide (P1NP), C-terminal crosslinked telopeptide of type 1 collagen (CTX)) and three muscle strength measures (handgrip, knee extension strength, chair-standing), were assessed using one-way ANOVA, Tukey HSD and subsequent linear ANCOVA models, adjusted for relevant covariates. Results Significantly increased serum 25(OH)D concentration from 53.3 (17) to 77.8 (14) nmol/L and from 44.5 (21) to 54.7 (18) nmol/L among Danish and Pakistani women in the fortified groups, respectively (P <  0.05). The bone turnover markers OC, BALP, P1NP and CTX did not change significantly. Muscle strength by handgrip, knee extension and chair-standing test did not change significantly following the intervention. Conclusions Consumption of vitamin D fortified foods for 12 weeks did not result in significant changes of the bone turnover markers OC, BALP, P1NP and CTX. Muscle strength measured as hand grip strength, knee extension strength and chair-standing did not change significantly following the intervention.

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