Analysis of Lower Extremity Muscle Strength by the Classification of the Event Characteristics in Secondary School Athletes

2020 ◽  
Vol 22 (1) ◽  
pp. 135-146
Author(s):  
Somi Yun ◽  
Kihoon Lim ◽  
Chulhyeong Park
Keyword(s):  
Muscle Strength ◽  
Secondary School ◽  
Lower Extremity ◽  
Lower Extremity Muscle

scholarly journals Long-term participation in community group exercise improves lower extremity muscle strength and delays age-related declines in walking speed and physical function in older adults

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Chisato Hayashi ◽  
Soshiro Ogata ◽  
Tadashi Okano ◽  
Hiromitsu Toyoda ◽  
Sonoe Mashino
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Physical Exercise ◽  
Lower Extremity ◽  
Physical Function ◽  
Community Dwelling ◽  
Group Exercise ◽  
Community Based ◽  
Lower Extremity Muscle

Abstract Background The effects of group exercise on the physical function of community-dwelling older adults remain unclear. The changes in lower extremity muscle strength, timed up and go (TUG) time, and the motor fitness scale (MFS), over time, among older adults who expressed a willingness to participate in community-based physical exercise groups, were determined using multilevel modelling. Methods We analyzed data of 2407 older adults between April 2010 and December 2019 from the registry of physical tests of community-based physical exercise groups. We conducted a retrospective cohort study to assess the effect of physical exercise on lower extremity muscle strength, TUG time, and MFS scores. The durations of the exercises were evaluated by frequency of physical test’s participate. Results A deterioration in lower extremity muscle strength was found in the short-term participant group only. However, in the mid-term and long-term participation groups, lower extremity muscle strength showed a trend of improvement. The TUG time and the MFS score were negatively correlated with increasing age in both groups divided by the duration of participation. However, there was a slower rate of deterioration in the long-term participation group. Discussion Lower extremity muscle strength, TUG time, and MFS scores decline with increasing age and there were differences in the slope of deterioration that depended on the duration of participation in community-based group exercise. Conclusion Participation in group exercise improved lower extremity muscle strength, TUG time, and MFS scores of older adults living in a community. The positive effects of group exercise were dependent on long-term participation.

scholarly journals Six-minute walk distance predicts hospitalization in elderly peritoneal dialysis patients: a single-center prospective cohort study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Hiroki Yabe ◽  
Yuto Imoto ◽  
Ayaka Onoyama ◽  
Sayaka Ito ◽  
Kenichi Kono ◽  
...  
Keyword(s):  
Cohort Study ◽  
Peritoneal Dialysis ◽  
Muscle Strength ◽  
Lower Extremity ◽  
Exercise Intolerance ◽  
Single Center ◽  
Walk Distance ◽  
Walk Speed ◽  
Lower Extremity Muscle

Abstract Background The risk of adverse events associated with peritoneal dialysis (PD) in elderly patients has not been thoroughly investigated. The purpose of this study was to assess the association between physical function and hospitalization in elderly PD patients. Methods This is a single-center prospective observational cohort study. Thirty-three aged patients (74.8 ± 5.9 years) participated in a 6-min walk distance, short physical performance battery (SPPB), lower extremity muscle strength, and 10-m walk speed. All subjects were followed until hospitalization to the end of the follow-up period. Results The 6-min walk distance was 332 ± 112.5 m; SPPB was 11 (8.3–12) points; the lower extremity muscle strength was 36.6 ± 9.6%; 10-m walk speed was 1.1± 0.2 m/s. During the follow-up, 19 patients (57.5%) were hospitalized. In the Kaplan-Meier survival analysis and log-rank test, a lower 6-min walk distance and PD vintage were significantly associated with hospitalization (p<0.05). After adjustment for PD vintage in Cox proportional analysis, the 6-min walk distance remained associated with hospitalization (95% confidence interval, 0.98–0.99). Conclusion Lower exercise tolerance assessed by the 6-min walk distance was significantly associated with hospitalization in elderly PD patients. Our findings indicate that measurement and intervention of exercise intolerance are essential to predict the clinical outcomes of elderly PD patients. Trial registration This study was prospectively registered at inception in the UMIN Clinical Trials Registry under identification number UMIN000038405.

Do Single-Leg Balance Control and Lower Extremity Muscle Strength Correlate with Ankle Instability and Leg Injuries in Young Ballet Dancers?

2021 ◽  
Author(s):  
You-jou Hung ◽  
Jenna Boehm ◽  
Morgan Reynolds ◽  
Kallee Whitehead ◽  
Kaylyn Leland
Keyword(s):  
Muscle Strength ◽  
Lower Extremity ◽  
Ankle Instability ◽  
Balance Control ◽  
Functional Ankle Instability ◽  
Lower Extremity Injuries ◽  
Ballet Dancers ◽  
Leg Injuries ◽  
Lower Extremity Muscle ◽  
Extremity Injuries

Ankle injuries are common among young ballet dancers. These injuries may be attributed to ankle instability, insufficient lower extremity strength, and poor balance control. The purpose of this study was to explore whether these dancers exhibit functional ankle instability and if their single-leg balance control and lower extremity muscle strength correlate with functional ankle instability and leg injuries. Twenty-one ballet dancers (aged 10 to 17 years) participated in the study. The Cumberland Ankle Instability Tool (CAIT) questionnaire was used to examine functional ankle stability. Isometric muscle strength of the major lower extremity muscles was measured with a digital hand-held dynamometer. Single-leg balance was evaluated with the Y-Balance Test (YBT) and three Athletic Single-leg Stability Test (ASLST) protocols. Lower extremity injuries (self-reported) within 6 months after testing were recorded for correlation analyses. Both dominant and non-dominant ankles of the subjects exhibited functional ankle instability (26.71 and 25.71, respectively). Raising the center of mass (passé and first arm position) during the ASLST did not significantly affect balance performance (p = 0.104). However, removing extrinsic visual feedback significantly decreased single-leg balance (p < 0.001). In general, there was low correlation (r ≤ 0.49) between muscle strength, CAIT, YBT, and ASLST scores with lower extremity injuries. It is concluded that for young ballet dancers lower extremity muscle strength and single-leg balance control may not be strong contributing factors to leg injuries. This study also suggests that functional ankle stability may not have a direct impact on single-leg balance, and ballet dancers rely heavily on extrinsic visual feedback for single-leg balance control. Teachers might consider minimizing extrinsic feedback to challenge ballet dancers when implementing training protocols for single-leg balance control.

scholarly journals Standard Value of Lower Extremity Muscle Strength of 8 Years Old Children and Its Correlation with Body Weight and Height

1970 ◽  
Vol 2 (01) ◽  
pp. 45-54
Author(s):  
Sarifitri FH Hutagalung ◽  
Ferial Hadipoetro Idris, ◽  
Keyword(s):  
Body Weight ◽  
Muscle Strength ◽  
Lower Extremity ◽  
Body Height ◽  
Knee Extensor ◽  
Left Knee ◽  
Knee Flexor ◽  
Lower Extremity Muscle ◽  
Left Ankle ◽  
Hip Flexor

Objectives: to know the standard value of lower extremity muscle strength of eight year old children and furthermore to explore the correlation of the muscle strength and body height and weight.Methods: The study design is cross sectional. The target is eight year old children in public elementary school in Jakarta Pusat. The subjects’ characteristics are normal nutritional state, and no neurological normusculoskeletal disorders. Sampling was done by cluster randomization to determine the location and simple randomization on site to determine subjects. There were 171 boys and 180 girls in this tudy. Independentvariables are age, sex, body weight, body height and nutritional state that was determine with Z-score of body mass index. Dependent variables are lower extremity muscle strength that classify as torque. This study usedhand-held dynamometer for muscle strength measurement. Statistical analysis was done with descriptive statistic and Pearson and Spearman correlation test.Results: Standard values of eight year old boy’s lower extremity muscle strength are: right hip flexor 21.86 Nm (SD 3.40), left hip flexor 19.64 Nm (SD 3.19), right hip extensor 17.05 Nm (SD 3.66), left hip extensor16.08 Nm (SD 3.56), right knee extensor 18.19 Nm (SD 3.60), left knee extensor 16.09 Nm (SD 3.55), right knee flexor 15.18 Nm (SD 4.23), left knee flexor 14.48 Nm (SD 3.97), right ankle dorsiflexor 6.58 Nm (SD1.53), left ankle dorsiflexor 6.05 Nm (SD 1.42), right ankle plantarflexor 10.08 Nm (SD 1.69), left ankle plantar flexor 9.13 Nm (SD 1.90).Standard values of eight year old girl’s lower extremity muscle strength are: right hip flexor 21.60 Nm (SD 3.62), left hip flexor 19.62 Nm (SD 3.37), right hip extensor 16.66 Nm (SD 4.06), left hip extensor 15.81 Nm(SD 3.94), right knee extensor 17.43 Nm (SD 3.79), left knee extensor 15.20 Nm (SD 3.38), right knee flexor 14.61 Nm (SD 4.28), left knee flexor 13.51 Nm (SD 4.00), right ankle dorsiflexor 6.34 Nm (SD 1.45), leftankle dorsiflexor 5.97 Nm (SD 1.52), right ankle plantarflexor 9.55 Nm (SD 1.98), left ankle plantar flexor 8.69 Nm (SD 1.83). The boy’s lower extremity muscle strength are stronger than the girl’s in left knee extensor,left knee flexor, right ankle plantarflexor and left ankle plantarflexor. The boy’s muscle strength are moderately correlated to body height except for right hip extensor, left hip extensor and right ankle dorsiflexorthat weakly correlated. The boy’s muscle strength are moderately correlated to body weight except for left hip extensor that weakly correlated. The girl’s muscle strength are moderately correlated to body height. Thegirl’s muscle strength are moderately correlated to body weight except for left hip flexor and left hip extensor that weakly correlated.Conclusions: The muscle strength pattern of boys and girls is similar; the strongest are right hip flexor and the weakest are left ankle dorsiflexor.Keywords: Muscle strength, standard values of eight year old children, torque, hand-held dynamometer

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