COMPARISON OF MAXIMAL HIP JOINT TORQUE DURING CONCENTRIC, ISOMETRIC AND ECCENTRIC CONTRACTIONS BETWEEN ELDERLY MEN AND WOMEN

2018 ◽  
Vol 18 (08) ◽  
pp. 1840036 ◽  
Author(s):  
YU-RI KWON ◽  
YOON-HYEOK CHOI ◽  
GWANG-MOON EOM ◽  
JUNGHYUK KO ◽  
JI-WON KIM
Keyword(s):  
Muscle Strength ◽  
Body Mass ◽  
Hip Joint ◽  
Elderly Women ◽  
Peak Torque ◽  
Joint Torque ◽  
Eccentric Contractions ◽  
Elderly Subjects ◽  
Elderly Men ◽  
Flexion And Extension

A higher fall rate has been reported in elderly women than in elderly men. Muscle strength is one of the key fall risk factors. The aim of this study was to investigate gender differences associated with maximal voluntary hip flexion and extension torque in concentric, isometric and eccentric contractions among the elderly subjects. A total of 20 healthy elderly subjects (10 men and 10 women) participated in this study. A dynamometer was used to measure hip joint torque during various modes of isokinetic contraction in frontal plane. The peak torque was normalized according to each subject’s body mass. Independent [Formula: see text]-tests were conducted to compare elderly women with elderly men. Elderly women exhibited weaker normalized peak torque during flexion and extension compared with elderly men in isometric contraction mode ([Formula: see text]). Eccentric strength of elderly women was significantly lower than in elderly men primarily in hip extension ([Formula: see text]). In contrast, no significant differences were observed in concentric contraction mode between the two genders ([Formula: see text]). These results suggest that the decreased muscle strength per body mass, especially in isometric and eccentric contraction, may be associated with a higher frequency of falls in elderly women than in elderly men. This study suggests the need for effective muscle strength training and intervention for fall prevention in elderly women.

GENDER DIFFERENCE OF KNEE JOINT TORQUE DURING MAXIMAL VOLUNTARY CONTRACTION IN THE ELDERLY

2019 ◽  
Vol 19 (07) ◽  
pp. 1940036
Author(s):  
JUNGHYUK KO ◽  
YU-RI KWON ◽  
YOON-HYEOK CHOI ◽  
GWANG-MOON EOM ◽  
JI-WON KIM
Keyword(s):  
Muscle Strength ◽  
Gender Difference ◽  
Knee Joint ◽  
Body Mass ◽  
Elderly Women ◽  
Peak Torque ◽  
Voluntary Contraction ◽  
Joint Torque ◽  
Elderly Men ◽  
Healthy Elderly

Reduced muscle strength is an important fall risk factor. The fall occurs more in elderly women than in elderly men. The aim of this study is to investigate muscle strength and the ability to generate rapid torque for knee joint in elderly men and women. Twenty healthy elderly participants (10 men and 10 women) performed maximal voluntary knee extension and flexion during concentric, isometric and eccentric conditions. The peak torque and rate of torque development (RTD) was normalized by each subject’s body mass. Independent [Formula: see text]-tests were employed in the comparison of elderly women with elderly men. Elderly women exhibited weaker isometric flexion and eccentric extension strength compared to elderly men ([Formula: see text]). Although there was no significant gender difference in isometric extension peak torque, RTD of elderly women was slower than it of elderly men ([Formula: see text]). In contrast, no significant gender differences were observed in concentric contraction condition ([Formula: see text]). These results indicate that the deteriorated RTD as well as muscle strength per body mass may be associated with a higher frequency of falls in elderly women than in elderly men. This study suggests that training of specific-contraction type should be considered for fall prevention in elderly women.

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.

scholarly journals Relationships between Body Build and Knee Joint Flexor and Extensor Torque of Polish First-Division Soccer Players

2020 ◽  
Vol 10 (3) ◽  
pp. 783 ◽  
Author(s):  
Jadwiga Pietraszewska ◽  
Artur Struzik ◽  
Anna Burdukiewicz ◽  
Aleksandra Stachoń ◽  
Bogdan Pietraszewski
Keyword(s):  
Knee Joint ◽  
Body Mass ◽  
Body Height ◽  
Peak Torque ◽  
Body Part ◽  
Skinfold Thickness ◽  
Joint Torque ◽  
Soccer Players ◽  
Lower Limb Muscles ◽  
Extensor Torque

The aim of the study is to identify the relationships between anthropometric variables and knee joint extensor peak torque, knee joint flexor peak torque, and conventional hamstring-to-quadriceps ratio in Polish first-division soccer players. The study examined 37 soccer players aged 19 to 30 years (body mass: 76.8 ± 7.2 kg, body height 1.82 ± 0.06 m). Muscle torques of the knee joint were measured under isometric conditions using a Biodex 4 Pro dynamometer. The anthropometric variables such as body part lengths, breadths, and girths and skinfold thickness were measured. The strongest relationships of knee joint extensors were observed with body mass and variables describing skeleton size and lower-limb muscles. Regarding knee flexor torque, a significant relationship was found only with body mass. However, no significant relationships were observed between the conventional hamstring-to-quadriceps ratio and the anthropometric variables studied. The regression analysis results identified body height, body mass, and thigh and calf girth as the features most associated with knee joint torque. However, anthropometric measurements do not provide full information about the torque proportions of antagonist muscle groups, which is very important for injury prevention. Therefore, measurements using special biomechanical equipment are also necessary for the comprehensive analyses and control of the effects of sports training.

scholarly journals Isokinetic Strength Profile of Elite Female Handball Players

2015 ◽  
Vol 49 (1) ◽  
pp. 257-266 ◽  
Author(s):  
Zuzana Xaverova ◽  
Johannes Dirnberger ◽  
Michal Lehnert ◽  
Jan Belka ◽  
Herbert Wagner ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Peak Torque ◽  
Systematic Assessment ◽  
Risk Of Injury ◽  
Training Cycle ◽  
Isokinetic Muscle Strength ◽  
Angular Velocities ◽  
Individual Evaluation ◽  
Knee Flexors ◽  
Flexion And Extension

Abstract Systematic assessment of muscle strength of the lower extremities throughout the annual training cycle in athletes is crucial from a performance perspective for the optimization of the training process, as well as a health perspective with regard to injury prevention. The main aim of the present study was to determine isokinetic muscle strength of the knee flexors and extensors in female handball players at the beginning of a preparatory period and to assess whether there were any differences between players of different performance levels. The performance level was expressed by means of membership of the Women’s Junior National Handball Team (JNT, n=8) or the Women’s National Handball Team (NT, n=9). The isokinetic peak torque during concentric and eccentric single-joint knee flexion and extension was measured at angular velocities of 60, 180, 240°/s (concentric) and 60°/s (eccentric). The Mann- Whitney test showed no significant differences in the peak torques or ipsilateral ratios between the two groups. The bilateral force deficit (BFD) for concentric extension at 240°/s was significantly higher in the JNT compared with the NT (p=0.04; d=1.02). However, the results of individual evaluation show that the BFD was more frequent in the NT in most measurements. A high BFD was evident in the eccentric mode in both groups highlighting a need for particular strengthening. With regard to low strength ratios a prevention programme should be suggested for both observed groups of professional female handball players to reduce the risk of injury.

scholarly journals Prevalence of reduced respiratory muscle strength in institutionalized elderly people

2009 ◽  
Vol 127 (2) ◽  
pp. 78-83 ◽  
Author(s):  
Rodrigo Polaquini Simões ◽  
Viviane Castello ◽  
Marco Antonio Auad ◽  
Jadiane Dionísio ◽  
Marisa Mazzonetto
Keyword(s):  
Body Mass Index ◽  
Muscle Strength ◽  
Body Mass ◽  
Respiratory Muscle ◽  
Elderly Women ◽  
Respiratory Muscle Strength ◽  
Cross Sectional ◽  
Institutionalized Elderly ◽  
Anthropometric Characteristics ◽  
Predicted Values

CONTEXT AND OBJECTIVES: Respiratory muscle strength is relevant to the clinical situation of elderly patients, particularly those presenting with respiratory or cardiac diseases. The objectives of this study were to evaluate the respiratory muscle strength of institutionalized elderly women, compare this with predicted values for the Brazilian population and calculate the correlation with age and anthropometric characteristics. DESIGN AND SETTING: Cross-sectional study at the Department of Physiotherapy of Universidade Camilo Castelo Branco. METHODS: The participants were 56 institutionalized elderly women (74.87 ± 10.55 years of age), evaluated in eight institutions in three cities in the central region of the State of São Paulo, between January 2005 and March 2006. They were separated into three subgroups according to age: 60-69 years (n = 20), 70-79 (n = 18) and 80-89 years (n = 18). Maximal respiratory pressures were obtained using a manovacuometer. The values obtained were compared between subgroups and with predicted values. Correlation analysis was used to evaluate age, weight, height and body mass index in relation to maximal respiratory pressures. The significance level was P < 0.05. RESULTS: No significant differences in maximal respiratory pressures were seen between the three subgroups. The maximal respiratory pressures were significantly lower in the three subgroups, compared with predicted values. Negative correlations between maximal respiratory pressures and age and positive correlations in relation to weight, height and body mass index were found. CONCLUSIONS: Respiratory muscle strength was markedly reduced in institutionalized 60 to 89-year-old women and the values demonstrated correlations with age and anthropometric characteristics.

scholarly journals Child–adult differences in muscle strength and activation pattern during isometric elbow flexion and extension

2009 ◽  
Vol 34 (4) ◽  
pp. 609-615 ◽  
Author(s):  
Bareket Falk ◽  
Charlotte Usselman ◽  
Raffy Dotan ◽  
Laura Brunton ◽  
Panagiota Klentrou ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Muscle Activation ◽  
Motor Units ◽  
Elbow Flexion ◽  
Peak Torque ◽  
Electromechanical Delay ◽  
Cross Sectional ◽  
Rate Of Torque Development ◽  
Torque Development ◽  
Flexion And Extension

Muscle strength and activation were compared in boys and men during maximal voluntary elbow flexion and extension contractions. Peak torque, peak rate of torque development (dτ/dτmax), rate of muscle activation, and electromechanical delay (EMD) were measured in 15 boys (aged 9.7 ± 1.6 years) and 16 men (aged 22.1 ± 2.8 years). During flexion, peak torque was significantly lower in boys than in men (19.5 ± 5.8 vs. 68.5 ± 11.0 Nm, respectively; p < 0.05), even when controlling for upper-arm cross-sectional area (CSA), and peak electromyography activity. Boys also exhibited a lower normalized dτ/dτmax (7.2 ± 1.7 vs. 9.5 ± 1.6 (Nm·s–1)·(Nm–1), respectively; p < 0.05) and a significantly longer EMD (75.5 ± 28.4 vs. 47.6 ± 17.5 ms, respectively). The pattern was similar for extension, except that group differences in peak torque were no longer significant when normalized for CSA. These results suggest that children may be less able to recruit or fully utilize their higher-threshold motor units, resulting in lower dimensionally normalized maximal torque and rate of torque development.

scholarly journals Effects of Exercise on Physical Fitness and Strength According to the Frailty Level of Female Elderly with Hypertension

2020 ◽  
Vol 29 (4) ◽  
pp. 368-376
Author(s):  
Kyung-Wan Baek ◽  
Min Chul Lee ◽  
Tae-Bong Jeon ◽  
Jun-Il Yoo ◽  
Jin Sung Park ◽  
...  
Keyword(s):  
Body Composition ◽  
Muscle Strength ◽  
Physical Fitness ◽  
Exercise Intervention ◽  
Elderly Women ◽  
Biceps Brachii ◽  
Elderly Subjects ◽  
Control Group ◽  
Blood Lipid Profile ◽  
Test Record

PURPOSE:The purpose of this study was to determine the effects of exercise on physical fitness and strength according to their frailty level of the hypertensive female elderly aged over 65.METHODS: Female elderly subjects (>65 year) with hypertension (n=90) were classified according to their level of frailty (Fr_), and were divided into control group (Ctrl) and exercise group (Ex). Hypertensive female elderly in exercise groups were subjected to 8-week combined exercise of aerobic (stretching and walking) and resistance (elastic band and weight training) exercise twice per week (50 minutes×2 times×8 weeks). Body composition, functional fitness and skeletal muscle strength were evaluated as main variables (Ctrl, n=27; Ex, n=23; Fr_Ctrl, n=17; Fr_Ex, n=23).RESULTS: Body composition, blood pressure, fasting glucose level (include hemoglobin A<sub>1c</sub>) and blood lipid profile did not interact with the exercise intervention and frailty level. Records of 30-second chair stretch test, two-minute walk test and arm curl increased after exercise intervention regardless of frailty level. The strength of quadriceps femoris increased after exercise intervention regardless of the level of frailty. However, the strength of biceps femoris (<i>p</i><.001), biceps brachii (<i>p</i><.05) and triceps brachii (<i>p</i><.001) was significantly increased in the Fr_Ex compared to pre-intervention of exercise.CONCLUSIONS: The classification according to the level of frailty in hypertensive female elderly can have a significant effect on the degree of muscle strength improvement by exercise intervention. In addition, this study newly discovered that the improvement of 30-s chair stretch test record in the hypertensive elderly women appeared faster than the improvement of the rapid-gait test record independently of the level of frailty.

Differences in the seasonal rhythmicity of plasma prolactin in elderly human subjects: detection in women but not in men

1983 ◽  
Vol 96 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Yvan Touitou ◽  
Alain Carayon ◽  
Alain Reinberg ◽  
André Bogdan ◽  
Hervé Beck
Keyword(s):  
Sex Difference ◽  
Elderly Women ◽  
Human Subjects ◽  
Mental Condition ◽  
Elderly Subjects ◽  
Plasma Prolactin ◽  
Elderly Men ◽  
Blood Samples ◽  
Young And Elderly Subjects ◽  
Seasonal Rhythmicity

Effects of age, sex and mental condition on the circadian and circannual rhythmicity of plasma prolactin in human subjects were investigated. Circannual changes were recorded on a circadian basis in January, March, June and October in four groups of subjects: seven young men, six elderly men, six elderly women and six senile demented patients (two men and four women). Blood samples were drawn every 4 h over a 24-h period at the four sampling sessions. Circadian rhythms of the hormone were validated in all groups and at all sampling sessions except twice in elderly demented subjects. The 24-h mean levels of prolactin in plasma were approximately the same in young and elderly subjects. The circadian acrophases were most often located in the vicinity of 02.00–04.00 h. The circannual rhythmicity of the hormone showed a sex difference; the rhythm was not validated in either young or elderly men but was detected in the groups of elderly women and elderly demented patients (mainly women). The acrophases were located in May. This paper strongly suggests a sex difference in the circannual rhythmicity of plasma prolactin levels in elderly subjects.

scholarly journals Relationship Between Physical Fitness, BMI, WHR and Hypertension in Elderly Men and Women

2013 ◽  
Vol 52 (4) ◽  
pp. 275-284
Author(s):  
Saša Pantelić ◽  
Radmila Kostić ◽  
Ratomir Djurašković ◽  
Slavoljub Uzunović ◽  
Zoran Milanović ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Body Mass Index ◽  
Physical Fitness ◽  
Body Mass ◽  
Elderly Women ◽  
Upper Body ◽  
Predictor Variables ◽  
Elderly Men ◽  
Men And Women ◽  
Arterial Blood

Abstract Aim: The aim of this study was to determine the structure, characteristics and significance of the relationship between physical fitness, BMI and WHR on one hand and hypertension of elderly men and women on the other. Methods: The sample consisted of 1288 participants (594 men and 694 women) who live in their own households in the cities and villages of Central, Eastern and South Serbia. After the obtained classification of participants based on arterial blood pressure, 231 patients with hypertension aged 60-80 years were selected. The subsample consisted of 138 male participants, while the subsample of women was 93 participants. Predictor variables consisted of 6 variables for the evaluation of physical fitness, Body mass index (BMI) and Waist-to Hip Ratio index (WHR). Criterion variables consisted of systolic blood pressure (SBP) and diastolic blood pressure (DBP). Results: The results showed that there is a statistically significant correlation (p <0.05) between predictor variables and hypertension. Higher values of higher SBP in elderly men causes an increase in body weight due to increased body fat (BMI, WHR). In elderly women, these changes occur under the influence of increased body mass index and reduced CRF. Higher values of high DBP in elderly men cause more power and flexibility of the upper body and in elderly women greater strength in the arms and less strength in legs and CRF. Conclusions: Being overweight in both subsamples could be considered as a factor that contributes to high blood pressure.

scholarly journals Effects of a therapeutic exercises program associated with pompage technique on pain, balance and strength in elderly women with knee osteoarthritis

2017 ◽  
Vol 30 (suppl 1) ◽  
pp. 11-21
Author(s):  
Ihana Thaís Guerra de Oliveira Gondim ◽  
Amanda Bruto da Costa Torres ◽  
Amanda Telino Baudel de Lacerda ◽  
Danielle Queiroz Kühni Fernandes ◽  
Moisés Costa do Couto ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Knee Osteoarthritis ◽  
Postural Balance ◽  
Elderly Women ◽  
Intervention Group ◽  
Knee Extensor ◽  
Peak Torque ◽  
Control Group ◽  
Therapeutic Exercise ◽  
Therapeutic Exercises

Abstract Introduction: Knee Osteoarthritis (OA) affects mainly elderly, being characterized by arthralgia, stiffness and strength and balance deficits. Scientific evidence suggests beneficial effects of exercise therapy on these changes, but lacks detailed protocols. In addition, there were published studies on effects of therapeutic exercise associated with pompage that were not located. Objective: To investigate the effects of a therapeutic exercise program associated with pompage on pain, balance and muscle strength in elderly women with knee osteoarthritis. Methods: A randomized pilot clinical trial that included 22 women (60 - 80 years) diagnosed with knee OA, randomized and allocated by simple raffle into two groups: intervention and control. Intervention group (strengthening and balance exercises and knee pompage) performed two sessions per week for 12 weeks. The control group received educational lectures, they were evaluated before and after 12 weeks: arthralgia- subscale pain of the Western Ontario and McMaster Universities Osteoarthritis Index questionnaire (WOMAC); postural stability- postural balance protocol by Biodex Balance SD and muscle strength- concentric peak torque of the knee extensor by isokinetic dynamometer. The Independent Student t test was used for intergroup analysis. Results: The intervention group compared with the control showed better results for the outcomes pain, balance and muscle strength after 12 weeks. However, the difference was statistically significant (p < 0.05) for levels of antero-posterior oscillation (DM -0.28, 95% CI -0.54 a -0.02; p = 0.035) and global oscillation (DM -0.36, 95% CI -0.68 a -0.04; p = 0.028). Conclusion: The intervention had a positive effect on postural balance in elderly women with knee osteoarthritis.

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