A comparative study of the acute effects of knee brace vs. kinesiotape on selected isokinetic strength variables of the knee muscles

2021 ◽  
pp. 1-6
Author(s):  
Ali Kerim Yilmaz ◽  
Mehmet Vural ◽  
Mustafa Özdal ◽  
Menderes Kabadayi
Keyword(s):  
Knee Injuries ◽  
Knee Extension ◽  
Acute Effects ◽  
Post Injury ◽  
Kinesio Tape ◽  
Knee Strength ◽  
Significant Difference ◽  
S Peak ◽  
Male Subjects ◽  
Methods Of Treatment

BACKGROUND: Different methods of treatment for preventing knee injuries, enhancing knee strength and minimising post-injury risks have been explored. Among these methods, Kinesio tape (KT) and knee braces (KB) are commonly used. OBJECTIVE : To investigate the acute effects of KT and KB on isokinetic knee strength parameters. METHODS: A total of 15 healthy sedentary male subjects voluntarily participated in the study. Concentric isokinetic knee extension (EX) and flexion (FLX) strength were measured at three sessions: 1. Baseline 2. with KT (’KT’) 3. with KB (’KB’). Tests were performed at 60, 180 and 240∘/s. Peak moment (PM), Hamstring/Quadriceps ratio (HQR), and joint angle at peak moment (JAPM) were measured. RESULTS: ‘KT’ and ‘KB’ were associated with increase in PMEX, PMFLX, HQR at 60 and 240∘/s (p< 0.05) and increased JAPMEX. No significant difference was observed at 180∘/s (p> 0.05). CONCLUSION: In healthy individuals, ‘I’ shape KT and KB positively affect EX and FLX strengths and HQR, especially at low angular velocity.

scholarly journals Self-Managed Strength Training for Active Duty Military With a Knee Injury: A Randomized Controlled Pilot Trial

2019 ◽  
Vol 184 (7-8) ◽  
pp. e174-e183 ◽  
Author(s):  
Laura A Talbot, Col, USAFR (Ret.) ◽  
Emily Brede ◽  
Marquita N Price ◽  
Pilar d Zuber ◽  
E Jeffrey Metter
Keyword(s):  
Knee Flexion ◽  
Knee Injuries ◽  
Knee Extensor ◽  
Knee Extension ◽  
Active Duty ◽  
Group Differences ◽  
Significant Group ◽  
Active Duty Military ◽  
Significant Difference ◽  
Injured Knee

Abstract Introduction Knee injuries among active duty military are one of the most frequent musculoskeletal injuries and are often caused by exercise or intense physical activity or combat training. These injuries pose a threat to force readiness. Our objective was to assess feasibility (including recruitment and retention rates) of three self-managed strengthening strategies for knee injuries and determine if they resulted in improvements in lower extremity strength, function, pain, and activity compared to usual physical therapy (PT) in military members. Methods A pilot study using a randomized controlled trial was conducted at three outpatient military medical treatment facilities. After baseline testing, 78 active duty military members with a knee injury were randomized to 1–4 trial arms: (1) neuromuscular electrical stimulation (NMES) applied to the quadriceps muscle; (2) graduated strength walking using a weighted vest (WALK); (3) combined NMES with strength walking (COMBO); (4) usual PT alone. All groups received usual PT. The primary outcome was the rates of change in knee extensor and flexor strength over 18 weeks. Secondary outcomes explored the rates of change in functional performance, pain, and activities of daily living scale (ADLS). The primary analysis for the endpoints used repeated measures, linear mixed-effects models. This study was approved by Institutional Review Boards at all facilities. Results The randomized sample (N = 78) included 19 participants in the PT-only, 20 in the WALK, 19 in the NMES and 20 in the COMBO groups. At baseline, there were no group differences. Fifty of the participants completed the 18-week study. The completers and non-completers differed at baseline on injury mechanism, with more completers injured during sports (45% vs 29%), and more non-completers during military training (36% vs 18%). Also, they differed in uninjured knee extension (completers 28% weaker), and uninjured knee flexion (completers 22% weaker). Adherence for self-reported daily step logs showed that the WALK group was 15% below goal and COMBO group 6% below goal. The 300 PV muscle stimulator showed the NMES group completed 34% of recommended stimulation sessions and the COMBO group 30%. Knee extension strength in the injured knee found only the COMBO group having a statistically higher improvement compared to PT-only (Change over 18 weeks: 10.6 kg in COMBO; 2.1 kg in PT-only). For the injured knee flexion changes, only the COMBO showed significant difference from PT-only (Change over 18 weeks: 7.5 kg in COMBO; −0.2 kg in PT-only). Similarly, for the uninjured knee, only the COMBO showed significant difference from PT-only in knee extension (Change over 18 weeks: 14.7 Kg in COMBO; 2.7 kg in PT-only) and knee flexion (Change over 18 weeks: 6.5 kg in COMBO; −0.2 kg in PT-only). Overall pain improved during the study for all groups with no significant group differences. Similarly, function and ADLS significantly improved over 18 weeks, with no significant group differences. Conclusions Knee extensor strength improvements in the COMBO group were significantly higher compared to usual PT. Pain, functional measures, and ADLS all improved during the study with no group differences. Further research is required to confirm these findings.

Does soft tissue mobilization assist static stretching to improve hamstring flexibility? A randomized controlled trial

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Shibili Nuhmani
Keyword(s):  
Soft Tissue ◽  
Controlled Trial ◽  
Knee Extension ◽  
Repeated Measure ◽  
Control Group ◽  
Static Stretching ◽  
Significant Difference ◽  
Hamstring Flexibility ◽  
Soft Tissue Mobilization ◽  
Experimental Group

AbstractObjectivesObjective of the study is to investigate whether Soft tissue mobilization (STM) can assist with static stretching to improve hamstring flexibly.MethodsThe design of the study was repeated measure design. The study was conducted at the physical therapy laboratory of Jamia Hamdard University, New Delhi. Participants included 78 healthy males with hamstring tightness, randomly assigned to either the control group (static stretching) or the experimental group (STM and static stretching). The experimental group received five sets of four different STM techniques, followed by two sets of 30-s static stretches 3 days per week over the course of 12 weeks. The control group received 5 min of sham ultrasound with an inactive probe prior to static stretching. Active knee extension test (AKE) was the outcome measure.ResultsBoth groups showed significant improvement in AKE compared with the baseline measurements. With ingroup analysis showed a significant difference in AKE across all measured time periods (weeks 4, 8, and 12) with pre-test in both groups (p<0.05). No significant difference in AKE improvement was found between groups (p>0.05).ConclusionThe results of this study show that STM prior to static stretching does not significantly improve hamstring flexibility among healthy individuals. Although this study cannot be generalized, the results may be useful for evidence-based practice in the management of hamstring tightness.

The acute effects of differential dietary fatty acids on human skeletal muscle pyruvate dehydrogenase activity

2008 ◽  
Vol 104 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Nicolette S. Bradley ◽  
George J. F. Heigenhauser ◽  
Brian D. Roy ◽  
Elizabeth M. Staples ◽  
J. Greig Inglis ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Pyruvate Dehydrogenase ◽  
Dietary Fatty Acids ◽  
Metabolic Effects ◽  
Moderate Intensity ◽  
Acute Effects ◽  
Moderate Intensity Exercise ◽  
Important Regulator ◽  
Male Subjects ◽  
Muscle Biopsies

Pyruvate dehydrogenase (PDH) is an important regulator of carbohydrate oxidation during exercise, and its activity can be downregulated by an increase in dietary fat. The purpose of this study was to determine the acute metabolic effects of differential dietary fatty acids on the activation of the PDH complex (PDHa activity) at rest and at the onset of moderate-intensity exercise. University-aged male subjects ( n = 7) underwent two fat-loading trials spaced at least 2 wk apart. Subjects consumed ∼300 g saturated (SFA) or n-6 polyunsaturated fatty acid (PUFA) fat over the course of 5 h. Following this, participants cycled at 65% of their maximum oxygen uptake for 15 min. Muscle biopsies were taken before and following fat loading and at 1 min exercise. Plasma free fatty acids increased from 0.15 ± 0.07 to 0.54 ± 0.19 mM over 5 h with SFA and from 0.11 ± 0.04 to 0.35 ± 0.13 mM with n-6 PUFA and were significantly lower throughout the n-6 PUFA trial. PDHa activity was unchanged following fat loading but increased at the onset of exercise in the SFA trial, from 1.18 ± 0.27 to 2.16 ± 0.37 mmol·min−1·kg wet wt−1. This effect was negated in the n-6 PUFA trial (1.04 ± 0.20 to 1.28 ± 0.36 mmol·min−1·kg wet wt−1). PDH kinase was unchanged in both trials, suggesting that the attenuation of PDHa activity with n-6 PUFA was a result of changes in the concentrations of intramitochondrial effectors, potentially intramitochondrial NADH or Ca2+. Our findings suggest that attenuated PDHa activity contributes to the preferential oxidation of n-6 PUFA during moderate-intensity exercise.

Acute Effects of Pedaling Cadence at Low Intensity on Arterial Stiffness in Healthy Young Men

2018 ◽  
Vol 40 (01) ◽  
pp. 3-8 ◽  
Author(s):  
Jun Yin ◽  
Hao Wu ◽  
Lan Yu ◽  
Jing Zhang ◽  
Weili Zhu
Keyword(s):  
Arterial Stiffness ◽  
Young Men ◽  
Crossover Design ◽  
Self Control ◽  
Acute Effects ◽  
Low Intensity ◽  
Significant Difference ◽  
Superior Effect ◽  
Changes Over Time ◽  
Over Time

AbstractTo examine the acute influence of pedaling cadence on arterial stiffness in young men, 15 healthy men (21.8±0.4 years) underwent 3 trials in self-control crossover design: non-cycling control (CON), cycling at 60 (RPM60) and 90 rounds per min (RPM90). Cycling lasted 30 min at intensity of 35% heart rate reserve. Arterial stiffness in cardio-ankle vascular index (CAVI) was measured at baseline (BL), immediately after (0 min) and 40 min after cycling. There were no significant CAVI changes over time in CON. CAVI in RPM60 decreased immediately after exercise and returned to baseline afterwards (6.1±0.2, 5.6±0.2 and 6.0±0.2 at BL, 0 and 40 min, respectively). RPM90 elicited significant CAVI reduction from 6.2±0.2 at BL to 5.5±0.2 at 0 min, and reverted to 5.7±0.1 at 40 min, maintaining significant difference to its baseline. There was no significant CAVI difference between RPM60 and CON, whereas CAVI in RPM90 was significantly lower than that in CON at 0 min (5.5±0.2 vs 6.1±0.2, P<0.01) and 40 min (5.7±0.1 vs 6.3±0.1, P<0.05). Despite equivalent exercise volume, arterial stiffness improvement induced by cycling was influenced by pedaling cadence. Higher cadence resulted in superior effect on arterial stiffness.

scholarly journals Complexity of Knee Neuromuscular Control in Uninjured Physically Active Adults: Right/Left and Dominant/Nondominant Asymmetry Analyses

2021 ◽  
Author(s):  
Nicholas Clark ◽  
Jamie Pethick
Keyword(s):  
Motor Neurons ◽  
Neuromuscular Control ◽  
Approximate Entropy ◽  
Knee Extension ◽  
Fluctuation Analysis ◽  
Temporal Behavior ◽  
Individual Level ◽  
Significant Difference ◽  
Clinically Significant ◽  
The Right

Context: Motor pathways include upper motor-neurons from the cerebrum and brainstem and lower motor-neurons from the spinal cord. Together, these physiological components are effectors of knee neuromuscular control. Because multiple components are involved, each with an output that is asynchronous to the others, ‘whole-system’ output is characterized by irregular temporal behavior and signal fluctuations. The irregular temporal behavior of physiological signals is analyzed using ‘complexity’. Complexity-based measures reflect the ability to adapt motor output rapidly and accurately in response to external perturbations and provide physiological information missed by magnitude-based (variability) measures.Objective: To characterize side-to-side symmetry of knee neuromuscular control (sub-maximal isometric knee extension constant-force task) using variability (coefficient of variation [CV%]) and complexity (approximate entropy [ApEn], detrended fluctuation analysis [DFA α]) measures.Design: Cross-sectional.Setting: Laboratory.Patients or Other Participants: Sixteen (male/female n=11/5; age 24.0±5.3yr; height 1.74±0.08m; body-mass 68.3±11.1kg).Main Outcome Measure(s): Right/left and dominant/nondominant group-level (t-test) and individual-level (absolute-asymmetry [%]) comparisons. A limb-symmetry-index was calculated for each variable and clinically-significant absolute-asymmetry defined (&gt;15%). Clinically-significant absolute-asymmetry prevalence (%) was computed for each variable.Results: The only significant side-to-side difference was for right/left DFA α (P=.000). Maximum absolute-asymmetries were (right/left, dominant/nondominant): CV 18.2%, 18.0%; ApEn 34.5%, 32.3%; DFA α 4.9%, 5.0%. Clinically-significant absolute-asymmetry prevalence was (right/left, dominant/nondominant): CV 43.8%, 43.8%; ApEn 62.5%, 50.0%; DFA α 0.0%, 0.0%.Conclusions: Different side-to-side comparison methods yield different findings. Large proportions of participants demonstrated wide ranges of side-to-side absolute-asymmetries. The finding of a significant difference for the right/left DFA α comparison but not for the right/left ApEn comparison suggests that different complexity variables assess different aspects of complexity. Consideration for how side-to-side comparisons are performed (right/left, dominant/nondominant) is required. Approximate entropy and DFA α assess different aspects of complexity and both should be used alongside other traditional magnitude-based measures when studying knee neuromuscular control.

scholarly journals RELEVANCE OF VO2max CONSUMPTION IN ELITE BULGARIAN TAEKWONDO COMPETITORS

2021 ◽  
Vol 2 (2021) ◽  
pp. 28-39
Author(s):  
Dimitar Avramov ◽  
Keyword(s):  
Heart Rate ◽  
Aerobic Fitness ◽  
Treadmill Test ◽  
Male Athletes ◽  
Weight Category ◽  
National Team ◽  
Significant Difference ◽  
The One ◽  
Male Subjects ◽  
One Way Anova

The aim of this study was to determine aerobic fitness through the VO2max treadmill test of elite Bulgarian taekwondo players with international results, and to determine whether the aerobic system had an effect upon the sports result in taekwondo. Fourteen elite taekwondo athletes, members of the Bulgarian national team (8 male and 6 female) were tested using a continuous progressive treadmill test. Physiological characteristics such as maximal oxygen uptake(VO2max), blood lactate and heart rate were measured. The male athletes recorded 58.2±3.4 ml kg–1 min–1 and the female 46.0±2.8 ml kg–1 min–1. The lactate level reached its highest at the 6’ after the VO2max with results for the males of 11.5±3.7 (mmol l-1) and 9.9±4.1 (mmol l-1) for the females respectively. A comparison between our results, regarding VO2max and previously reported was made using the One-way Anova for independent samples. It showed no significant difference between the male subjects (58.2±3.4 versus 60.7±3.3 ml kg(-1) min(-1), p>.05) and significant difference between the female ones (46.0±2.8 versus 49.8±2.8 ml kg(-1) min(-1), p<.05). Investigated also was the number of kicks executed by the winner of -49 kg weight category and her direct opponents during the 2019 Grand Prix Sofia. It was discovered that the winner kicked an average of 86.25 times per match and her kicks during the Grand Prix Sofia accumulated to 390 in total. It is our conclusion that the aerobic fitness does not play a significant role in taekwondo.

scholarly journals Study of blood lead and semen lead concentration in male infertility

Pulse ◽  
2011 ◽  
Vol 4 (1) ◽  
pp. 10-13
Author(s):  
BC Debnath ◽  
M Ibrahim ◽  
P Fatima
Keyword(s):  
Male Infertility ◽  
Lead Concentration ◽  
Blood Lead ◽  
Semen Parameters ◽  
Significant Difference ◽  
Serum Hormone ◽  
History Of ◽  
Male Subjects ◽  
Larger Sample ◽  
Control Study

Objective: To evaluate the association of blood and semen lead with male  infertility. Design: It was a case control study carried out in the department of Biochemistry, BSMMU, from January, 2004 to December, 2004.Subjects: Of 52 male subjects, 26 were infertile with oligospermia and / or asthenospermia. Age matched 26 normospermic subjects with normal standard semen parameters (volume, count, motility and morphology) were selected as controls. None had the history of occupational exposure to lead.Results: Median values of blood lead were 19.96 µg/dl and 17.68 µg/dl (normal <25 µg/dl); semen lead were 29.56µg/dl and 28.17 µg/dl (normal 15.37 ± 3.92 µg/dl) in cases and controls respectively. Neither blood lead nor semen lead showed significant difference between cases and controls. There was significant positive correlation between blood lead and semen lead concentrations. There was no significant correlation of semen and blood lead concentrations with other semen parameters & serum hormone concentrations (FSH, LH, & Testosterone) in cases. Conclusion: Though the association of blood or semen lead with male infertility was not established in our study, yet, increased seminal lead concentration found in our study subjects may be indicative of subtle exposure of lead in our environment. So, further study with larger sample size is needed. The clinicians should consider the lead measurements when evaluating male partners of couples with unexplained infertility and for assessment of lead status, semen lead measurement can be recommended.DOI: http://dx.doi.org/10.3329/pulse.v4i1.6955Pulse Vol.4 January 2010 p.10-13

The Effects of Taping on Muscle Activity and Throwing Velocity in Fatigued Baseball Players

2021 ◽  
Vol 3 (1) ◽  
pp. 18-29
Author(s):  
Kara-Lyn R. Harrison ◽  
Paolo Sanzo ◽  
Carlos Zerpa ◽  
Taryn Klarner
Keyword(s):  
Pilot Study ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Performance Enhancement ◽  
Maximum Velocity ◽  
Baseball Players ◽  
Kinesio Tape ◽  
Significant Difference ◽  
Post Test ◽  
And Performance

Due to the repetitive high forces and torques placed on an individual during a baseball pitch, shoulder pain is present in 46-57% of pitchers. Therapeutic taping has been proposed to have beneficial qualities in injury prevention, rehabilitation, and performance enhancement via muscular facilitation. Therefore, the purpose of this pilot study was to investigate the effect of taping on the velocity of an overhead baseball throw and muscle activation patterning of the supraspinatus, infraspinatus, and pectoralis major muscles in baseball players after muscle fatigue was induced. Participants were asked to complete three pre-test maximum velocity overhead throws, a fatiguing protocol, followed by three post-test maximum velocity pitches. There was no statistically significant difference in throwing velocity or muscle activity with the application of the different taping conditions in the three phases of an overhead baseball throw. These finding suggest Kinesio Tape® does not change muscle activation or velocity of overhead baseball throws when compared to a no tape condition.

Injury Reporting Rates and Injury Concealment Patterns Differ Between High-school Cirque Performers and Basketball Players

2011 ◽  
Vol 26 (4) ◽  
pp. 200-205 ◽  
Author(s):  
Ashley S Long ◽  
Jatin P Ambegaonkar ◽  
Patty M Fahringer
Keyword(s):  
High School ◽  
Performing Arts ◽  
Peer Group ◽  
Healthcare Providers ◽  
Knee Injuries ◽  
Pain Tolerance ◽  
Basketball Players ◽  
Significant Difference ◽  
Injury Reporting ◽  
Reporting Rates

The performing arts style of cirque has grown in popularity, with high-school participants increasingly practicing this style. Still, little research has examined the injury reporting rates and patterns in this population. Our study aimed to compare injury reporting rates and injury concealment patterns between high-school cirque performers and a peer-group of basketball players. Methods: Fifty participants (30 cirque, 20 basketball) completed a 12-item injury history and concealment instrument with chi-squared analyses and Fisher’s exact tests comparing groups (p = 0.05). Results: While no group differences (p = 0.36) existed in injuries reported, basketball players were more likely (p = 0.01) to miss participation due to injury than cirque performers. No significant difference existed between participants regarding which healthcare provider they reported to first (p = 0.27), but basketball players reported their injuries to the athletic trainer at higher rates (50%) than cirque performers (20%). A nonsignificant trend (p = 0.08) was noted in promptness to report injury, with more cirque performers (13%) concealing their injuries than basketball players (5%). Several reasons were noted for concealment of injury, with the most common being the belief that the injury would “go away” on its own. Knee injuries were most common in basketball players (23.7%) and back and knee injuries (10.5% each) in cirque performers. Conclusions: Despite similar injury rates, cirque participants concealed injuries more than peer-basketball players. Reasons may include losing performance roles, unfamiliarity and low trust with healthcare providers, ignorance about initially minor-looking injuries, and higher pain tolerance thresholds. Education and communication are essential to allow performing artists to seek healthcare support. Research is needed to appropriately understand and meet the needs of this underserved performing artist population.

Influence of Handgrip Stabilization During Isokinetic Knee Strength Assessment in Older Women

2020 ◽  
Vol 127 (4) ◽  
pp. 671-683
Author(s):  
João P. Nunes ◽  
Paolo M. Cunha ◽  
Jerry L. Mayhew ◽  
Alex S. Ribeiro ◽  
Paulo S. Junior ◽  
...  
Keyword(s):  
Older Women ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Knee Extension ◽  
Convenience Sample ◽  
Strength Assessment ◽  
Intraclass Correlation Coefficients ◽  
Knee Strength ◽  
Hands On ◽  
Angular Velocities

The present study aimed to evaluate the influence of holding the chair handles during the assessment of older women’s knee flexion and extension isokinetic and isometric strength. Of 57 older women (≥60 years) selected from a convenience sample for this research, 23 were randomly chosen to perform the tests twice for reliability analyses. Each participant performed maximal isokinetic knee extension and flexion at 60°/s and 180°/s angular velocities and isometric tests under two conditions: (a) holding the lateral handle of the chair (HOLD) and (b) supporting the hands on the shoulders with the arms crossed (i.e., not holding the handle [NHOLD]). Participants performed significantly better in the HOLD compared with the NHOLD condition. Slightly lower intraclass correlation coefficients (ICC = 0.870–0.956) were noted for the HOLD than for the NHOLD condition (ICC = 0.900–0.981) so that the HOLD performance on Days 1 and 2 was different on some measures. Owing to the higher reliability coefficients in the NHOLD condition, results suggest that, when assessing knee strength in older women, the evaluee should place their hands over their shoulders with arms crossed in front of the chest (NHOLD) to maximize assessment reliability (reproducibility of performance).

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