Differences in hip torque ratios between individuals with femoroacetabular impingement syndrome and asymptomatic individuals: A cross-sectional study.

BACKGROUND: Hip torque ratios are considered a useful measure for patients with hip pain. However, evidence regarding this measure for patients with femoroacetabular impingement syndrome is scarce. The primary aim of this study was to compare hip external-internal rotation and abduction-adduction torque ratios between patients with femoroacetabular impingement syndrome and asymptomatic individuals. The secondary aim was to compare hip torque ratios between the asymptomatic group and femoroacetabular impingement syndrome patients grouped according to the severity of symptoms and functional limitations. METHODS: Hip abduction-adduction and external-internal rotation torque ratios of 134 individuals with femoroacetabular impingement syndrome and 134 asymptomatic matched controls was assessed through isokinetic testing. Severity of symptoms and functional limitations was assessed through the iHOT-33. Mann Whitney U and Kruskall-Wallis tests were used to compare hip torque ratios between asymptomatic individuals and patients with femoroacetabular impingement syndrome and to patients with femoroacetabular impingement syndrome with different severities of symptoms and functional limitations. FINDINGS: No differences were identified in hip abduction-adduction (U = 7659.5, p = 0.192) and external-internal rotation (U = 8787.5, p = 0.764) torque ratios between patients with femoroacetabular impingement syndrome and asymptomatic individuals. Hip abduction-adduction torque ratio was higher (p = 0.0127) in patients with a severe state (median = 1.80, IQR = 0.61) when compared to asymptomatic individuals (median = 1.52, IQR = 0.45) (moderate effect size, r = 0.45). INTERPRETATION: Patients with severe symptoms and functional limitations related to FAI syndrome presented greater hip abduction-adduction torque ratio than asymptomatic individuals, suggesting a decreased adduction torque capacity relative to abduction torque in this subgroup of femoroacetabular impingement.

Knee and hip dynamic muscle strength in individuals with femoroacetabular impingement syndrome scheduled for hip arthroscopy: A case-control study.

Background The primary aim of this study was to compare knee and hip dynamic muscle strength of individuals with femoroacetabular impingement (FAI) syndrome scheduled for hip arthroscopy with healthy controls. Our secondary aim was to compare hip and knee muscle strength between male and female patients with FAI syndrome. Methods One hundred and thirty-four individuals with femoroacetabular impingement syndrome scheduled for hip arthroscopy and 134 healthy controls matched for sex and age (within 5 years range) underwent an isokinetic assessment of knee extension and flexion and hip abduction, adduction, external rotation and internal rotation dynamic muscle strength. Two MANOVAs were conducted to compare isokinetic peak torque and total work between groups and sexes. Findings Individuals with femoroacetabular impingement syndrome demonstrated lower values of all variables representing knee and hip isokinetic peak torque and total work measures when compared to healthy controls, with differences ranging from 0.09 Nm/kg (95%CI: 0.06-0.12 Nm/kg) to 0.64 Nm/kg (95%CI: 0.49-0.79 Nm/kg). Female participants from both FAI syndrome and control group showed less knee and hip muscle strength compared to male participants. There was no significant interaction between group and sex regarding knee or hip isokinetic peak torque and total work (p > 0.05). Interpretation Individuals with femoroacetabular impingement syndrome scheduled for hip arthroscopy present impairments in knee or hip dynamic muscle strength when compared to controls. Female participants present less knee and hip muscular strength compared to male participants, these between-sex differences are similar for both FAI syndrome and control group participants.

Association between severity of hip chondrolabral injuries, dynamic hip muscle strength and quality of life: A cross-sectional study in patients with femoroacetabular impingement syndrome scheduled for hip arthroscopy.

BACKGROUND: We assessed the association between: the severity of hip chondral or labral pathology with dynamic hip muscle strength or quality of life in patients with femoroacetabular impingement syndrome scheduled for hip arthroscopy. We also assessed the association between dynamic hip muscle strength with quality of life. METHODS: Eighty-three participants with femoroacetabular impingement syndrome scheduled for hip arthroscopy were included. We measured dynamic hip abduction and adduction muscle strength with an isokinetic dynamometer (Nm/kg), and quality of life with the iHoT-33 questionnaire. The severity of hip chondrolabral pathologies was scored using the modified Beck classification. Linear regression analyses were conducted to assess the association between severity of hip chondral or labral pathology with dynamic hip muscle strength and quality of life. FINDINGS: The regression analyses showed no association between the (i) severity of hip chondral (adjusted r2: 0.14) or labral (adjusted r2: 0.08) pathology and quality of life (P > 0.05), (ii) between the severity of hip chondral or labral pathology and dynamic hip abduction and adduction muscle strength (P > 0.05). Significant correlation was observed for quality of life and hip abduction (adjusted r2:0.29; P < 0.001) or adduction (adjusted r2: 0.32; P < 0.001) muscle strength. INTERPRETATION: The severity of hip chondral or labral pathologies were not associated with quality of life or dynamic hip muscle strength in participants with femoroacetabular impingement syndrome. Greater dynamic hip abduction and adduction muscle strength were associated with better quality of life in participants with femoroacetabular impingement syndrome scheduled for hip arthroscopy.

Isokinetic hip muscle strength: a systematic review of normative data.

The aim of this study was to conduct a systematic review to determine the quality of evidence of studies assessing isokinetic hip muscle strength in adult non-injured individuals. We also aimed to summarise and pool data of normative values for hip muscle strength. The influence of methodological and participant-related factors on hip strength performance was explored as well. Guidelines proposed in the PRISMA were used to undertake a search strategy involving the keyword 'hip' associated with a set of keywords reflecting muscle strength. Five databases were searched: ProQuest, PubMed, Science Direct, Scopus and Web of Science. From the 2,939 records initially retained, 28 articles were included in this systematic review. Eight articles were classified as high quality. This systematic review exposed the methodological fragility of most studies assessing hip strength in non-injured adult population. Only data from studies with a small number of participants are available to be used as reference. A few individual studies suggest no differences in torque parameters between dominant and non-dominant lower limbs; differences in torque parameters between age groups; and between male and female participants. Overall, reference values for hip muscle performance in isokinetic tests are mostly unclear.

Alongamento balístico versus sustentar e relaxar: comparação do ganho imediato e após 24 horas / Ballistic versus hold-relax stretching: comparison of immediate

Dentre os métodos de alongamento mais utilizados na prática clínica, encontram-se os métodos balístico e facilitação neuromuscular proprioceptiva (FNP) através da técnica de sustentar-relaxar. Poucos estudos analisaram por quanto tempo as alterações na amplitude de movimento (ADM) decorrentes da intervenção permanecem ou compararam a efetividade de dois tipos de carga sobre este tempo. Sendo assim, o objetivo deste estudo foi comparar qual método de alongamento aplicado à musculatura isquiotibial, dentre balístico e FNP do tipo sustentar-relaxar, é mais eficaz no ganho de ADM e na manutenção deste após 24 horas. Participaram do estudo 19 adultos jovens saudáveis. A avaliação da ADM foi realizada através da foto grametria antes, imediatamente após e 24 horas após a intervenção. Os métodos de alongamento foram aplicados de forma randomizada em uma sessão. Através dos resultados foi possível verificar que ambas as técnicas foram capazes de aumentar a ADM imediatamente após a aplicação (p = 0,001 para o balístico e p = 0,001 para o sustentar-relaxar) e manter por 24 horas após a aplicação (p = 0,023 para o balístico e p = 0,022 para o sustentar-relaxar). No entanto, na comparação entre os métodos, não houve diferença no ganho de ADM obtido. Confirma-se, portanto, a equivalente efetividade de ambos os métodos na obtenção e manutenção do ganho de ADM.

Ballistic and proprioceptive neuromuscular facilitation (PNF)through hold-relax technique are amongst the most used stretchingmethods in the clinical practice. Few studies have explored for howlong alterations in range of movement (ROM) dependent upon thestretching intervention have lasted or compared the effi cacy of diff erenttypes of stretching within a given load on this time. Th erefore,the aim of this study was to compare ballistic and PNF hold-relaxstretching and their eff ects in the hamstrings musculature related to ROM gain and its maintenance after 24 hours. 19 healthy young adults participated on the study. The ROM evaluation was carriedout through photogrammetry before, immediately after and after 24 hours the intervention. The stretching methods were randomly assigned in one session. It was possible to verify, through the results, that both techniques improved ROM immediately after intervention(p = 0,001 for ballistic and p = 0,001 for hold-relax) and theeff ects were maintained after 24 hours intervention (p = 0,023 forballistic and p = 0,022 for hold-relax). However, when comparingboth methods, no difference was found about the ROM gained. It has been then confi rmed the equal efficacy of both methods forimprovement and maintenance of ROM.