Relationship between a Lumbopelvic Stabilization Strength Test and Pelvic Motion in Running

2000 ◽  
Vol 9 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Dale Bickham ◽  
Warren Young ◽  
Peter Blanch
Keyword(s):  
Outcome Measures ◽  
Pelvic Tilt ◽  
Strength Test ◽  
Distance Runners ◽  
Long Distance ◽  
Static Loads ◽  
Significant Relationships ◽  
Pelvic Motion ◽  
Lumbopelvic Stabilization ◽  
The Relationship

Objective:To determine the relationship between lumbopelvic (LP) stabilization strength and pelvic motion during running.Design:Runners were assessed for pelvic motion and undertook an LP stabilization strength test.Participants:Sixteen elite male middle- and long-distance runners.interventions:Pelvis kinematics were assessed while subjects ran at 5 m/s on a treadmill.Main Outcome Measures:Angular pelvis displacement was divided into 3 axes of rotation: pelvic tilt, obliquity, and rotation. LP stabilization strength was the capacity to resist increasing static loads applied to each leg and maintain a neutral LP zone. Intercorrelations were calculated for all measures of pelvic motion and LP stabilization strength.Results:There were no significant relationships found among any of the variables (P> .05). However, the LP stabilization strength test possessed good interday reliability.Conclusions:The relationship between pelvic motion and muscle function should be studied under a variety of other conditions.

scholarly journals The relationship between lower limb maximal and explosive strength and change of direction ability: Comparison of basketball and tennis players, and long-distance runners

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256347
Author(s):  
Žiga Kozinc ◽  
Darjan Smajla ◽  
Nejc Šarabon
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Trunk Muscles ◽  
Distance Runners ◽  
Long Distance ◽  
Basketball Players ◽  
Tennis Players ◽  
Change Of Direction ◽  
Explosive Strength ◽  
The Relationship

Change-of-direction (CoD) ability is an important determinant of athletic performance. Muscle strength is among the most important determinants of CoD ability. However, previous studies investigating the relationship between CoD ability and muscle strength focused mostly on flexor and extensor muscle groups, or used multi-joint exercises, such as jumps, squats or mid-thigh pull. The purpose of the present study was to investigate the relationship between CoD ability and strength of ankle, knee, hip and trunk maximal and explosive strength. The participants (n = 327), consisting of male and female basketball players, tennis players and long-distance runners completed isometric strength assessments and CoD testing (90° and 180° turn tests). The times of both CoD tests were associated with muscle strength (peak torques and the rate of torque development variables), with correlation coefficients being mostly weak to moderate (r = 0.2–0.6). Strength variables explained 33%, 62% and 48% of the variance in the 90° turn task, and 42%, 36% and 59% of the variance in the 180° turn task, in basketball players, long-distance runners and tennis players, respectively. Hip and trunk muscle strength variables were the most prevalent in the regression models, especially hip adduction and abduction strength. Our results suggest that the strength of several lower limb muscles, in particular of the hip abductors and adductors, and trunk muscles, but also hip rotators, extensors and flexors, as well as knee and ankle flexors and extensors should be considered when aiming to improve CoD performance.

The Relationship Between Hamstring Muscle Extensibility and Spinal Postures Varies with the Degree of Knee Extension

2013 ◽  
Vol 29 (6) ◽  
pp. 678-686 ◽  
Author(s):  
José M. Muyor ◽  
Pedro A. López-Miñarro ◽  
Fernando Alacid
Keyword(s):  
Lumbar Spine ◽  
Thoracic Spine ◽  
Pelvic Tilt ◽  
Knee Extension ◽  
Hamstring Muscle ◽  
Trunk Flexion ◽  
Spinal Curvatures ◽  
Significant Relationships ◽  
Thoracic And Lumbar Spine ◽  
The Relationship

The aim was to determine the relationship between hamstring muscle extensibility and sagittal spinal curvatures and pelvic tilt in cyclists while adopting several postures. A total of 75 male cyclists were recruited for this study (34.79 ± 9.46 years). Thoracic and lumbar spine and pelvic tilt were randomly measured using a Spinal Mouse. Hamstring muscle extensibility was determined in both legs by a passive knee extension test. Low relationships were found between hamstring muscle extensibility and spinal parameters (thoracic and lumbar curvature, and pelvic tilt) in standing, slumped sitting, and on the bicycle (r= .19;P> .05). Significant but low relationships were found in maximal trunk flexion with knees flexed (r= .29;P< .05). In addition, in the sit-and-reach test, low and statistically significant relationships were found between hamstring muscle extensibility for thoracic spine (r= –.23;P= .01) and (r= .37;P= .001) for pelvic tilt. In conclusion, hamstring muscle extensibility has a significant relationship in maximal trunk flexion postures with knees flexed and extended, but there are no relationships while standing or on the bicycle postures.

Running economy and its correlation to performance and fitness variables in recreationally-trained distance runners

2020 ◽  
Vol 16 (2) ◽  
pp. 107-112 ◽  
Author(s):  
B.N. Bozzini ◽  
J.K. Pellegrino ◽  
A.J. Walker ◽  
B.A. McFadden ◽  
A.N. Poyssick ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Ventilatory Threshold ◽  
Maximal Oxygen Consumption ◽  
Time Trial ◽  
Running Economy ◽  
Distance Runners ◽  
Fat Percentage ◽  
Long Distance ◽  
Significant Relationships ◽  
Physiological Capacity

Specific physiological attributes such as maximal oxygen consumption (VO2max) and running economy (RE) have been suggested to help predict long distance performance in endurance athletes. Despite this, investigations of RE have yielded conflicting results, particularly when comparing elite and recreational runners. The purpose of this study was to illustrate correlations between RE, expressed as submaximal oxygen consumption at a given speed, and time trial (TT) performance in addition to various fitness markers in endurance-trained individuals. Trained distance runners (n=21) performed a battery of tests over three sessions to provide measurements of RE at 2.68 m/s (RE2.68) and 4.25 m/s (RE4.25), TT performance, VO2max, velocity at ventilatory threshold (VVT), and body composition. Pearson-product moment correlations, defined as weak (r≥0.25), moderate (r≥0.45), and strong (r≥0.65), were calculated among all measures and significance was set at P<0.05. The findings suggested that faster TT performance was significantly (P<0.05) correlated to a higher VO2max (r=-0.86) and lower body fat percentage (BF%; r=0.78). However, TT performance displayed only a weak trend to RE4.25 (r=-0.40, P=0.07) and was not correlated to RE2.68 (r=0.15; P>0.05). Additionally, better RE4.25 (i.e. decreased submaximal oxygen consumption) was associated with a lower VO2max (r=0.66, P<0.05) and an increased BF% (r=-0.46, P<0.05). RE2.68 revealed no significant relationships with these measures. Comparable to their elite counterparts, higher aerobic capacity is strongly linked to performance in recreational distance runners, though in this cohort RE only weakly related to performance at the faster velocity. Finally, the inverse relationship between markers of overall fitness and RE suggests that enhanced RE may be an adaptive response to a limited physiological capacity in this population.

The Relationship Between Hip Kinematics and Iliotibial Band Syndrome (ITBS) in Long Distance Runners: A Critically Appraised Topic

2016 ◽  
Vol 21 (4) ◽  
pp. 5-11
Author(s):  
Janice K. Loudon ◽  
Marcie Swift
Keyword(s):  
Lower Extremity ◽  
Iliotibial Band ◽  
Clinical Question ◽  
Distance Runners ◽  
Long Distance ◽  
Bottom Line ◽  
Iliotibial Band Syndrome ◽  
History Of ◽  
Hip Kinematics ◽  
The Relationship

Clinical Question:Is there evidence to suggest that runners with a history of ITBS demonstrate altered lower extremity kinematics compared with runners without a history of ITBS?Clinical Bottom Line:There is moderate evidence suggesting that hip kinematics differ between runners with a history of ITBS compared with healthy runners. Results are contradictory related to the plane of movement and direction of the kinematic change. In addition, assessing hip kinematics following an exhaustive run may be beneficial to detect change.

Tibial Acceleration and Spatiotemporal Mechanics in Distance Runners During Reduced-Body-Weight Conditions

2017 ◽  
Vol 26 (3) ◽  
pp. 221-226 ◽  
Author(s):  
Matthew F. Moran ◽  
Brendan J. Rickert ◽  
Beau K. Greer
Keyword(s):  
Body Weight ◽  
Outcome Measures ◽  
Distance Runners ◽  
Cross Sectional ◽  
Step Rate ◽  
Reduced Body ◽  
Reaction Forces ◽  
Tibial Acceleration ◽  
Tibial Shock ◽  
The Relationship

Context:Treadmills that unload runners via a differential air-pressure (DAP) bladder (eg, AlterG Anti-Gravity Treadmill) are commonly used to reduce effective body weight (BW) in a clinical setting. However, the relationship between the level of unloading and tibial stress is currently unknown.Objective:To determine the relationship between tibial impact acceleration and level of BW unloading during running.Design:Cross-sectional.Setting:University motion-analysis laboratory.Participants:15 distance runners (9 male, 6 female; 20.4 ± 2.4 y, 60.1 ± 12.6 kg).Main Outcome Measures:Peak tibial acceleration and peak-to-peak tibial acceleration were measured via a uniaxial accelerometer attached to the tibia during a 37-min continuous treadmill run that simulated reduced-BW conditions via a DAP bladder. The trial began with a 10-min run at 100% BW followed by nine 3-min stages where BW was systematically reduced from 95% to 60% in 5% increments.Results:There was no significant relationship between level of BW and either peak tibial acceleration or peak-to-peak tibial acceleration (P > .05). Both heart rate and step rate were significantly reduced with each 5% reduction in BW level (P < .01).Conclusions:Although ground-reaction forces are reduced when running in reduced-BW conditions on a DAP treadmill, tibial shock magnitudes are unchanged as an alteration in spatiotemporal running mechanics (eg, reduced step rate) and may nullify the unloading effect.

Anterior Shoulder Laxity Is Not Correlated with Medial Elbow Laxity in High School Baseball Players

2008 ◽  
Vol 17 (2) ◽  
pp. 106-118 ◽  
Author(s):  
Brian A. Friscia ◽  
Robert R. Hammill ◽  
Brian A. McGuire ◽  
Jay N. Hertel ◽  
Christopher D. Ingersoll
Keyword(s):  
High School ◽  
Outcome Measures ◽  
Glenohumeral Joint ◽  
High School Athletes ◽  
Baseball Players ◽  
Male Athletes ◽  
Significant Relationships ◽  
Cohort Design ◽  
Shoulder Laxity ◽  
The Relationship

Context:Uninjured baseball players have been shown to have increased anterior glenohumeral joint laxity, which may result in adaptive changes at the medial elbow.Objective:To determine the relationship between anterior shoulder laxity and medial elbow laxity in both arms of baseball and nonbaseball high school athletes and compare the laxity of dominant and nondominant shoulders and elbows of high school baseball and nonbaseball players.Design:Cohort design.Setting:Local high schools.Participants:Thirty healthy high school male athletes.Outcome Measures:Anterior shoulder and medial elbow laxity measurements were taken bilaterally with the Ligmaster™.Results:Dominant and nondominant shoulder laxity was significantly greater in the nonbaseball players than the baseball players. No other significant relationships existed.Conclusions:High school baseball players exhibit less anterior shoulder laxity than do nonbaseball players. No relationship exists between anterior shoulder and medial elbow laxity in high school baseball players.

Valuing empathy and emotional intelligence in health leadership: a study of empathy, leadership behaviour and outcome effectiveness

2005 ◽  
Vol 18 (1) ◽  
pp. 1-12 ◽  
Author(s):  
C Skinner ◽  
P Spurgeon
Keyword(s):  
Outcome Measures ◽  
Leadership Style ◽  
Perspective Taking ◽  
Related Individual ◽  
Extra Effort ◽  
Significant Relationships ◽  
Health Leadership ◽  
Individual Traits ◽  
Leadership Behaviour ◽  
The Relationship

This article examines the relationship between health managers' self-assessed empathy, their leadership behaviours as rated by their staff, and staff's personal ratings on a range of work satisfaction and related outcome measures. Empathy was conceived of as four distinct but related individual dispositions, namely empathic concern (EC), perspective taking (PT), personal distress (PD) and empathic matching (EM). Results showed three empathy scales (EC, PT and EM) were, as postulated, positively related to transformational behaviour (inspiring followers to achieve more than expected). The same three measures, also as expected, showed no relationship to transactional behaviour (motivating followers to achieve expected results) and were negatively associated with laissez-faire leadership (an absence of leadership style). Relationships between empathy scales and outcome measures were selective and moderate in size. Strongest empathy association was evident between the PT scale and most outcome measures. Conversely, the extra effort outcome appeared most sensitive to the range of empathy scales. Where significant relationships did exist between empathy and outcome, leadership behaviour was in all cases a perfect mediator. Whilst not denying the smaller dispositional effects on leadership outcomes, leadership behaviour itself, rather than individual traits such as empathy, appear to be major influencing factors in leadership effectiveness.

scholarly journals ESTUDO PREDITIVO DA INTENSIDADE DE CORRIDA NA MEIA-MARATONA COM BASE NA RELAÇÃO LACTATO-VELOCIDADE OBTIDA NUM TESTE DE TERRENO

2000 ◽  
Vol 6 (13) ◽  
pp. 19-25
Author(s):  
Paulo J. M. Santos
Keyword(s):  
Field Test ◽  
Pearson Correlation ◽  
Field Tests ◽  
Pearson Correlation Coefficient ◽  
Simple Linear Regression ◽  
Distance Runners ◽  
Long Distance ◽  
Running Speed ◽  
Blood Samples ◽  
The Relationship

O objetivo deste estudo foi investigar a validade de um teste de terreno na predição da performance na meia-maratona (21095m). Foram avaliados 18 fundistas que realizaram um total de 33 meias-maratonas e um número idêntico de testes de terreno incrementais (4x2000m), de modo a determinar a relação entre a intensidade de corrida e a acumulação sangüínea de lactato. As velocidades utilizadas no teste variaram entre 4.2 e 5.8m/s, com incrementos de 0.4m/s por patamar. Após cada patamar de carga foram recolhidas amostras de sangue capilar do lóbulo da orelha e analisadas num YSI-1500L Sport para determinação da lactatemia. Na análise estatística recorremos ao Coeficiente de Correlação de Pearson e ao Modelo de Regressão Linear Simples. O nível de significância foi mantido em 5%. 0 The purpose of this study was to investigate the validity of a field test in predicting the half-marathon (21095m) performance. Eighteen long-distance runners performed a total of 33 halfmarathons and an equal amount of incrementai field tests (4x2000m) to established the relationship between running speed and blood lactate leveis. The speeds used in the field test ranged from 4.2 to 5.8m/s with increments of 0.4m/s in each step. Following each loading levei blood samples were taken from the ear lobe and analysed using an YSI-1500L Sport. Statistical analysis included the Pearson correlation coefficient and the simple linear regression model. The levei of significance was set at 5%

scholarly journals Mechanical Work and Long-Distance Performance Prediction: the Influence of Allometric Scaling

2013 ◽  
Vol 38 ◽  
pp. 73-82 ◽  
Author(s):  
Marcus Peikriszwili Tartaruga ◽  
Jeanick Brisswalter ◽  
Carlos Bolli Mota ◽  
Cristine Lima Alberton ◽  
Natalia Andrea Gomeñuka ◽  
...  
Keyword(s):  
Allometric Scaling ◽  
Sagittal Plane ◽  
Body Height ◽  
Digital Camera ◽  
Mechanical Work ◽  
Distance Runners ◽  
Long Distance ◽  
Long Distance Running ◽  
And Performance ◽  
The Relationship

Abstract The purpose of this study was to examine the effect of allometric scaling on the relationship between mechanical work and long-distance running performance in recreational runners. Fourteen recreational long-distance runners (male, mean ± SD - age: 29 ± 7 years; body mass: 70.0 ± 10.2 kg; body height: 1.71 ± 0.07 m; maximal oxygen uptake: VO2max 52.0 ± 4.9 ml.kg-1.min-1) performed two tests: a continuous incremental test to volitional exhaustion in order to determine VO2max, and a 6-minute running submaximal test at 3.1 m.s-1, during which segments in the sagittal plane were recorded using a digital camera and the internal (Wint), external (Wext) and total (Wtot) mechanic work, in J.kg-1.m-1, was subsequently calculated. The results indicated a significant correlation between mechanical work and performance, however, the strongest correlations were observed when allometric exponents were used (respectively for Wint, Wext and Wtot; non allometric vs. allometric scaling defined by literature (0.75) or determined mathematically (0.49): r = 0.38 vs. r = 0.44 and r = 0.50; r = 0.80 vs. r = 0.83 and r = 0.82; r = 0.70 vs. r = 0.77 and r = 0.78). These results indicate that mechanical work could be used as a predictor of recreational long-distance performance and an allometric model may improve this prediction.

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