Showing papers by "Raphael Mendes Ritti-Dias published in 2010"
TL;DR: ST improves functional limitation similarly to WT but it produces lower pain, suggesting that this type of exercise could be useful and should be considered in patients with IC.
97 citations
TL;DR: The daily ambulatory cadences of women are correlated with their calf muscle StO2 during exercise, as women who walk slower in the community setting reach their minimum calf Muscle Hemoglobin oxygen saturation sooner than those who walk at faster paces.
52 citations
TL;DR: Painful ambulation at a constant speed is associated with impaired walking economy, as measured by an increase in oxygen uptake in patients limited by intermittent claudication, and the change in walking economy is explained, in part, by severity of PAD, diabetes, and hypertension.
41 citations
TL;DR: Claudication pain slows ambulatory velocity at preferred and rapid paces, and increases asymmetry when ambulatory function is challenged with rapid walking.
Abstract: We determined the effect of claudication pain on temporal and spatial gait characteristics, and on ambulatory symmetry at preferred and rapid self-selected walking paces in patients with unilateral peripheral arterial disease (PAD). Twentyeight patients with PAD limited by intermittent claudication were studied. Patients ambulated at their preferred and rapid paces over a 7.3-meter portable gait mat system while they were pain-free and after experiencing claudication pain. The order of the pain-free and painful walking trials was randomized, and the following gait parameters were obtained: velocity, cadence, stride length, swing time, stance time, single-support time, and double-support time. During the selfselected rapid pace, patients walked 3% slower (p 0.020) while in pain due to a 3% shorter stride length (p < 0.001), and they were in double-stance longer (p 0.024). Claudication pain in the symptomatic leg resulted in an increase in single-stance (p 0.007). Furthermore, gait became asymmetrical with pain, as the symptomatic leg spent a higher percentage of the gait cycle in the swing phase (p < 0.01) and lower percentages in stance (p < 0.01) and single-stance (p < 0.01) than the asymptomatic leg. Ambulation was symmetrical for all measures during the pain-free trial. In conclusion, claudication pain slows ambulatory velocity at preferred and rapid paces, and increases asymmetry when ambulatory function is challenged with rapid walking. The reduced ambulatory speed with the development of claudication pain may be an adaptation to elicit a safer and less destabilizing gait pattern.
33 citations
TL;DR: It is suggested that two test sessions are necessary for the accurate evaluation of strength and endurance in patients with PAD, as reliability coefficients ranging from 0.77 to 0.96 are presented.
Abstract: The objective was to determine the reliability of isokinetic strength and endurance testing in the ankle joints of patients with intermittent claudication. Twenty-three patients with peripheral artery disease (PAD) and symptoms of intermittent claudication participated in the study. Isokinetic strength and endurance testing of the ankle joint were performed in symptomatic and asymptomatic legs on 3 separate days. Intraclass coefficient correlation of peak torque (PT) and total work (TW) ranged from 0.77 to 0.92 and 0.89 to 0.96, respectively. PT and TW increased significantly and similarly in both legs from day 1 to day 2 (PT: +42 +/- 84% in the symptomatic leg and +33 +/- 51% in the asymptomatic leg, p < 0.05;TW: +38 +/- 26% in the symptomatic leg and +26 +/- 50% in the asymptomatic leg, p < 0.05). In conclusion, isokinetic strength and endurance testing in the ankle joints of patients with PAD presents reliability coefficients ranging from 0.77 to 0.96. However, strength and endurance increased between the first and the other test sessions performed on separate days, suggesting that two test sessions are necessary for the accurate evaluation of strength and endurance in patients with PAD.
15 citations
TL;DR: Isokinetic strength and endurance testing in patients with IC results in elevation of heart rate, systolic blood pressure and double product values during the exercises, suggesting that strength testing of small muscle groups causes less cardiovascular overload in these patients.
Abstract: FUNDAMENTO: A dinamometria isocinetica tem tido crescente importância para avaliacao da funcao muscular em individuos com claudicacao intermitente. No entanto, ainda ha escassez de informacoes sobre as respostas cardiovasculares desses doentes durante este tipo de avaliacao. OBJETIVO: Avaliar e comparar as respostas cardiovasculares na avaliacao da forca e resistencia muscular de dois exercicios comumente utilizados para de pacientes com CI (flexao plantar/dorsiflexao e flexao/extensao de joelhos). METODOS: Dezessete claudicantes com doenca estavel ha pelo menos 6 meses compuseram a amostra avaliada no dinamometro isocinetico. Frequencia cardiaca, pressao arterial e duplo produto foram mensurados nao invasivamente em repouso e no pico do esforco, em protocolos especificos para avaliacao de forca e resistencia muscular. RESULTADOS: Com excecao da pressao arterial diastolica, a frequencia cardiaca, pressao arterial sistolica e o duplo produto aumentaram durante o exercicio em comparacao ao repouso (p < 0,05). A frequencia cardiaca e o duplo produto sofreram maior elevacao durante o exercicio de extensao/flexao de joelho, em comparacao ao exercicio de flexao plantar/dorsiflexao (P < 0,05). Maiores incrementos na frequencia cardiaca foram observados durante o protocolo de avaliacao da resistencia em comparacao ao da avaliacao da forca muscular. CONCLUSAO: Os testes isocineticos de avaliacao da forca e resistencia musculares em pacientes com CI promovem aumento da frequencia cardiaca, da pressao arterial sistolica e do duplo produto durante sua execucao. Estes aumentos sao maiores nos testes de resistencia muscular e nos que envolvem maior massa muscular, sugerindo que testes de forca de pequenos grupamentos musculares promovem menor sobrecarga cardiovascular nesses pacientes.
11 citations
TL;DR: The treadmill test is limited in almost 20 % of elderly patients with PAD and non-PAD and these results highlight the need for other forms of exercise stress tests in order to assess the peripheral limitation of patients withPAD.
Abstract: Background: To describe the applicability and the performance of the treadmill test in elderly patients with peripheral arterial disease (PAD) and without PAD (non-PAD). Patients and methods: Fifty consecutive PAD and non-PAD elderly patients performed a progressive treadmill test. The proportion of patients who were unable to perform the test and the maximal walking distance were obtained. Results: The proportion of patients who were unable to perform the treadmill test was similar between PAD (16.6 %) and non-PAD patients (12.5 %), P = .57. Maximal walking time for patients who performed the treadmill test was not different between PAD (232 ± 218 s) and non-PAD patients (308 ± 289 s), P = .37. Conclusions: The treadmill test is limited in almost 20 % of elderly patients with PAD and non-PAD. These results highlight the need for other forms of exercise stress tests in order to assess the peripheral limitation of patients with PAD.
10 citations
TL;DR: In this paper, the authors measured daily ambulation with a step activity monitor (Step Watch 3) in patients with peripheral artery disease (PAD) and found that patients with claudication ambulated less each day than controls, as they take 1081 fewer strides and spend 48 fewer minutes ambulating each day.
Abstract: Background: Peripheral artery disease (PAD) is characterized by arterial lesions of the lower extremities. Patients with PAD present ambulatory dysfunction due to intermittent claudication, limiting daily physical activity and increasing morbidity. Therefore, objectively measured daily ambulation is a clinically relevant outcome in these patients. Objective: To quantify daily ambulation with a step activity monitor (Step Watch 3™; Cyma Inc., Mountlake Terrace, WA, USA) in patients with PAD. Major findings: Patients with claudication ambulate less each day than controls, as they take 1081 fewer strides (1 stride=2 steps) and spend 48 fewer minutes ambulating each day. The cadence obtained during endurance ambulation (maximum cadences for 60, 30, and 20 continuous minutes of ambulation) and short bouts of ambulation (maximum cadence for continuous minutes of ambulation and for the minute having the single highest cadence value each day) is also lower in patients. Demographic factors and comorbid co...
8 citations
TL;DR: Although the results present some controversies, they suggest a positive impact on physical activity/exercise to increase BMD and decrease the prevalence of osteoporosis.
Abstract: O objetivo deste estudo foi revisar a literatura nacional sobre atividade fisica e densidade mineral ossea (DMO)/osteoporose. Foi realizada pesquisa bibliografica nas bases de dados Lilacs e Sibradid. Foram utilizados os termos "osteoporose" e "densidade ossea" que foram combinados com os termos "atividade fisica" e "exercicio fisico". Foram incluidos os estudos originais que foram publicados em lingua portuguesa, relacionavam a DMO ou osteoporose com atividade fisica ou exercicio fisico em humanos e estavam disponiveis online. Sete estudos atenderam a esses criterios e foram incluidos na revisao. Dos tres estudos que analisaram a associacao entre a pratica de atividade fisica na infância e a DMO/osteoporose, apenas um verificou associacao significante. Dos seis estudos que analisaram a relacao entre a atividade fisica atual e a DMO, quatro estudos verificaram relacao significante. Os resultados dessa revisao evidenciaram a existencia de poucos estudos que investigaram a relacao entre atividade fisica e DMO/osteoporose na literatura nacional. Os resultados destes estudos, embora apresentem algumas controversias, sugerem que a atividade fisica pode aumentar a DMO e diminuir a prevalencia de osteoporose.
5 citations