Reproducibility of concentric isokinetic and isometric strength measurements at the hip in patients with hip osteoarthritis: A preliminary study

Steinhilber, Benjamin; Haupt, Georg; Boeer, Johannes; Grau, Stefan; Krauß, Inga

doi:10.3233/ies-2011-0395

Cited by 10 publications

(14 citation statements)

References 26 publications

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“…The peak muscle force of the hip extensor muscles was uniformly scaled to match, at full activation, the average quasi-static isokinetic peak hip extension torque (105.1 Nm) measured on a cohort of healthy elderly controls (54 to 73 years of age) reported by Steinhilber et al (2011) [ 13 ]. The isolated effect of maximal isometric hip extensor contraction was calculated assuming no passive muscle resistance to muscle stretching and zero activation of the antagonist muscles and by neglecting gravitational forces.…”

Section: Methodsmentioning

confidence: 99%

“…Changes of aBMD in the exercise leg can be calculated and adjusted for aBMD changes in the control leg to minimise confounding effects such as that of age or diet [ 7 ]. The force of the hip extensor muscles exerted during maximal hip extension exercises [ 13 ] can be calculated using musculoskeletal modelling. The mechanical stimulus for bone adaptation and the vBMD response in the femoral neck and trochanteric and intertrochanteric regions can be calculated using a finite-element model and bone adaptation theory [ 1 , 12 , 14 ] and matched to the measured aBMD for the following: (a) comparing the pattern of the measured and calculated bone response and (b) analysing the distribution of the mechanical stimulus.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Femoral Neck Mechanoresponse to Hip Extensors Exercise: A Case Study

Martelli

Mokhtarzadeh

Pivonka

et al. 2017

Journal of Osteoporosis

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Physical activity is recommended to prevent age-related bone loss. However, the proximal femur mechanoresponse is variable, possibly because of a muscle-dependant mechanoresponse. We compared the proximal femur response with the femoral strain pattern generated by the hip extensor muscles. A healthy participant underwent a six-month unilateral training of the hip extensor muscles using a resistance weight regularly adjusted to the 80% of the one-repetition maximum weight. DXA-based measurements of the areal Bone Mineral Density (aBMD) in the exercise leg were adjusted for changes in the control leg. The biomechanical stimulus for bone adaptation (BS) was calculated using published models of the musculoskeletal system and the average hip extension moment in elderly participants. Volumetric (ΔvBMD) and areal (ΔaBMD) BMD changes were calculated. The measured and calculated BMD changes consistently showed a positive and negative effect of exercise in the femoral neck (ΔaBMD = +0.7%; ΔvBMD = +0.8%) and the trochanter region (ΔaBMD = −4.1%; ΔvBMD = −0.5%), respectively. The 17% of the femoral neck exceeded the 75th percentile of the spatially heterogeneous BS distribution. Hip extensor exercises may be beneficial in the proximal femoral neck but not in the trochanteric region. DXA-based measurements may not capture significant aBMD local changes.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Femoral Neck Mechanoresponse to Hip Extensors Exercise: A Case Study

Martelli

Mokhtarzadeh

Pivonka

et al. 2017

Journal of Osteoporosis

View full text Add to dashboard Cite

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“…Femoral neck strains were calculated using (a) validated musculoskeletal and finite-element models of an average-sized Caucasian woman and (b) hip and knee moment measured during maximal isometric exercises from two cohorts of elderly healthy participants [ 9 , 10 ]. Contractions of the hip-spanning muscles across a physiological range of hip and knee angles were simulated.…”

Section: Methodsmentioning

confidence: 99%

“…The hip and knee moment generating capacity in the model was matched to that in the elderly population. The peak isometric moment about the hip and the knee measured in two cohorts of healthy controls was taken from the work of Steinhilber et al [ 10 ] and Tan et al [ 9 ] ( Table 1 ). One cohort (five males and eleven females aged 54 to 73) executed maximal isometric exercises about the hip [ 10 ] while the second cohort (thirty females of 50.6 ± 9.7 year of age) executed maximal exercises about the knee [ 9 ].…”

Section: Methodsmentioning

confidence: 99%

Femoral Neck Strain during Maximal Contraction of Isolated Hip-Spanning Muscle Groups

Martelli

2017

Computational and Mathematical Methods in Medicine

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The aim of the study was to investigate femoral neck strain during maximal isometric contraction of the hip-spanning muscles. The musculoskeletal and the femur finite-element models from an elderly white woman were taken from earlier studies. The hip-spanning muscles were grouped by function in six hip-spanning muscle groups. The peak hip and knee moments in the model were matched to corresponding published measurements of the hip and knee moments during maximal isometric exercises about the hip and the knee in elderly participants. The femoral neck strain was calculated using full activation of the agonist muscles at fourteen physiological joint angles. The 5% ± 0.8% of the femoral neck volume exceeded the 90th percentile of the strain distribution across the 84 studied scenarios. Hip extensors, flexors, and abductors generated the highest tension in the proximal neck (2727 με), tension (986 με) and compression (−2818 με) in the anterior and posterior neck, and compression (−2069 με) in the distal neck, respectively. Hip extensors and flexors generated the highest neck strain per unit of joint moment (63–67 με·m·N−1) at extreme hip angles. Therefore, femoral neck strain is heterogeneous and muscle contraction and posture dependent.

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“…These parameters were assessed on a Biodex System III Pro Isokinetic Dynamometer (Biodex Medical System, NY, USA). Before measurements were taken, participants were asked to warm up on a bicycle ergometer for 5 minutes using a self-chosen resistance of 40-60 rpm (20-30 watts), followed by 5 minutes of stretching exercises for the trunk and lower extremities (26). Isokinetic testing was performed before isometric testing.…”

Section: Primary Outcomesmentioning

confidence: 99%

Peer Review #3 of "Pilates versus resistance training on trunk strength and balance adaptations in older women: a randomized controlled trial (v0.2)"

González-Moro¹

2019

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Background. The neuromuscular decline impact in old women functional independence is determining the necessity to implement new strategies focused on core strength training and postural stability maintenance to promote healthy ageing. Objectives. To define whether Pilates or resistance training is better at improving a) core isometric and isokinetic muscular strength, and b) static and dynamic balance, in older women. Methods. This was a cluster randomized controlled trial. Physically independent older women (60-80 years) from day centres were randomly allocated to Pilates, Muscular and Control Groups (PG, MG and CG) using block randomization method. Only the research staff performing the assessment and statistical analysis were blinded. Exercise groups trained twice a week (1 hour per session) for 18 weeks in a moderate-to-vigorous intensity. Core strength (primary outcome): trunk and hip isometric and hip isokinetic muscular strength (Biodex System III Pro Isokinetic Dynamometer), alongside one leg static balance (portable force platform Kistler 9286AA) and dynamic balance (Timed Up and Go) were assessed. Results. Sixty participants were randomized (PG, n=20; MG, n=20; CG, n=20) and forty-nine completed the trial (PG, n=16; MG, n=19; CG, n=14). Regarding hip isometric extension strength, PG was statistically better than CG (P = 0.004). There were no differences between groups regarding isokinetic strength or balance. Intra-group comparisons showed significant improvements (P < 0.05) in the dynamic balance and trunk and hip isometric extension strength for PG and MG, whereas every hip isokinetic measurement was improved in MG. Exercise programs did not produce any adverse event. Conclusions. The Pilates training program was more effective for improving isometric hip and trunk extension strength, while the Muscular training program generated greater benefits on trunk and hip isokinetic strength. Moreover, both training programmes showed moderate effects for the Timed Up and Go. The trial was registered at ClinicalTrials.gov (identifier: NCT02506491).

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Reproducibility of concentric isokinetic and isometric strength measurements at the hip in patients with hip osteoarthritis: A preliminary study

Abstract: Reproducibility of concentric isokinetic and isometric strength measurements at the hip in patients with hip osteoarthritis: A preliminary study

Cited by 10 publications

References 26 publications

The Femoral Neck Mechanoresponse to Hip Extensors Exercise: A Case Study

The Femoral Neck Mechanoresponse to Hip Extensors Exercise: A Case Study

Femoral Neck Strain during Maximal Contraction of Isolated Hip-Spanning Muscle Groups

Peer Review #3 of "Pilates versus resistance training on trunk strength and balance adaptations in older women: a randomized controlled trial (v0.2)"

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