Associations of role, area deprivation index, and race with health behaviors and body mass index among localized prostate cancer patients and their partners.

PURPOSE: To examine the associations of role (localized prostate cancer (PCa) patient vs. their intimate partner), area deprivation index (ADI-higher scores indicating higher neighborhood deprivation levels), and race (Black/African American (AA) vs. White) with health behaviors and body mass index (BMI) among PCa patients and partners. The behaviors include smoking, alcohol consumption, diet quality, sedentary behaviors, and physical activity (PA). METHODS: This study used the baseline data collected in a clinical trial. Given the nested structure of the dyadic data, multi-level models were used. RESULTS: Significant role-race interaction effects on smoking, ADI-race effects on alcohol consumption, and role-ADI effects on BMI were found. Meanwhile, patients smoked more cigarettes, decreased alcohol consumption, had less healthful diets, spent longer time watching TV, did fewer sedentary hobbies, had more confidence in PA, and had higher BMIs than their partners. High ADI was independently associated with lower odds of drinking alcohol, using computer/Internet, and doing non-walking PA, and higher BMI compared to low ADI controlling for role and race. Black/AA dyads had less smoking amount and alcohol consumption and higher sedentary time and BMI than White dyads when adjusted for role and ADI. CONCLUSIONS: This study identified significant interaction and main effects of role, ADI, or race on health behaviors and BMI. IMPLICATIONS FOR CANCER SURVIVORS: Future behavioral interventions should address divergent individual needs between patients and partners, social and neighborhood barriers, and cultural indicators of racial groups to promote healthful behaviors and improve the quality of survivorship for PCa patients and partners.

A Scoping Review to Contribute to Knowledge About Culturally Adapting Interventions for Latino Family Caregivers of Persons Living With Dementia.

INTRODUCTION: Few interventions have focused on Latino family caregivers to persons with dementia, addressing their unique needs. This review aimed to identify best practices in cultural adaptation to make recommendations for adapting interventions for Latino family caregivers of persons living with dementia. METHOD: This scoping review was conducted following the Joanna Briggs Institute Scoping Review guidelines, with findings extracted and summarized from 17 studies addressing cultural adaptation. RESULTS: Frameworks guiding the adaptations were comprehensive, addressing cultural values and traditions and the social context faced by Latino family caregivers. Features of the adaptations included diverse teams of researchers and community members, including Latino family caregivers, to inform the integration of cultural values into the content, mode, and place of intervention delivery. DISCUSSION: Culturally adapting evidence-based interventions will increase the number of available interventions for Latino family caregivers to persons living with dementia, thus reducing inequities in caregiver support.

Synergistic effect of exercise and statins on femoral strength in rats.

It is now widely recognized that in order to optimize bone health in the later years, bone healthy behaviors should begin at a young age and continue throughout life. Prescribed orally to lower lipid levels in adults of all ages, statins have also been shown to stimulate bone formation in vitro by promoting bone morphogenic protein-2 (BMP-2) activity and to stimulate bone formation in vivo. Weight bearing exercise is well known to stimulate bone formation through a mechanism whereby mechanical loading is 'sensed' by the mechano-sensors leading to a cascade of events involving the activation of osteoblasts. For individuals with high cholesterol levels, both of these interventions are recommended throughout adult life. Since statins and exercise stimulate bone formation via different mechanisms, we hypothesized that exercise in combination with oral simvastatin synergistically increases bone mineral density and strength. Mature adult female, Sprague Dawley rats were divided into 4 groups: control (n=9), statin only (n=8), exercise only (n=11), and statin plus exercise (n=11). Simvastatin was given to the two groups at a dose of 10 mg/kg/day in standard rat chow for the entire 5 week period. All rats ate the same mass of food. The two exercise groups ran on a treadmill with progressively greater speeds and time, ending on week 5 at 30 m/min for 60 min. After 5 weeks, rats were euthanized, and excised femurs were scanned for areal bone mineral density (BMD) and tested by three point bending to obtain the following performance measures: maximum force (strength), stiffness, and work-to-fracture. Only the group treated with statins and exercise showed a positive effect on the biomechanical performance of the femurs. Compared to controls, this group had increased maximum force, stiffness, moment of inertia, and BMD. Linear regression analysis revealed that the increased performance was related to increased BMD. We conclude that the combination of oral statins and appropriate exercise increases bone strength better than either individual treatment and may provide optimal protection against osteoporosis.

Transdermal lovastatin enhances fracture repair in rats.

Statins have been shown to stimulate BMP2 transcription and bone formation. This raises the possibility that they could be useful for enhancing rates of fracture repair. Observational studies in patients treated with oral statins for lipid-lowering have been controversial. The likely reason for their inconsistent effects is that the statin concentration reaching the periphery was too low after oral administration to produce a reproducible biologic effect. Thus, we examined the effects of lovastatin (LV) given transdermally in a well-described preclinical model of fracture repair. Effects on the healing fracture callus were assessed by biomechanical strength, radiographs, and quantitative morphology. LV was administered transdermally (TD) for 5 days after fracture in several doses (0.1-5 mg/kg/d) and compared with vehicle-treated control rats and rats treated with LV by oral gavage (PO) at 5-25 mg/kg/d for 5 days from the day of fracture. Radiological evaluation of bones treated with TD LV showed enhanced fracture repair at 2 and 6 wk. BMD in the callus area at 6 wk was also increased in the TD group compared with vehicle-treated controls (p < 0.05). The force required to break TD-treated bones (0.1 mg/kg/d for 5 days) was 42% greater than vehicle-treated controls (p < 0.02), and there was a 90% increase in stiffness (p < 0.01). PO LV at much higher doses (10 and 25 mg/kg/d) showed increased stiffness but no change in other biomechanical properties. By histological examination, a significant increase was also observed in the size of the callus, surrounding proliferating cell nuclear antigen-positive cells, and osteoblast and osteoclast number in TD-treated rats compared with controls at day 8 after fracture (n = 6). In summary, we found that TD LV in low doses accelerates fracture healing, whereas 10-fold the lipid-lowering dose was required to produce any effect when it was administered orally. These studies provide valuable information on the potential of statins and TD delivery as a new and effective therapeutic modality in fracture repair.

The effects of strength training on central arterial compliance in middle-aged and older adults.

BACKGROUND: Contrary to aerobic exercise, strength training (ST) is associated with decreased central arterial compliance in young men. It is unknown whether ST, with or without concurrent endurance training, would have a similar effect in older adults with reduced baseline arterial compliance. OBJECTIVE: The primary aim of this study was to determine the effect of a ST program on central arterial compliance in middle-aged and older adults. DESIGN: Randomized, controlled intervention study in which 37 healthy, sedentary men and women (52+/-2 years) performed 13 weeks of ST (n=13), ST+aerobic exercise (n=12) or stretching exercises as a control group (n=12). METHODS: Participants were rigorously screened for cardiovascular disease and underwent pre-post testing for carotid arterial compliance (via simultaneous ultrasound and applanation tonometry), carotid-femoral pulse wave velocity, plasma endothelin-1 and angiotensin II concentrations and carotid artery vasoreactivity (cold pressor test). RESULTS: ST performed alone, or in conjunction with aerobic exercise, improved maximal muscle strength and increased total lean body mass (both P<0.01). No significant changes were observed in carotid artery compliance or carotid-femoral pulse wave velocity following ST or ST+aerobic exercise. Carotid artery compliance increased significantly (23%) following stretching which may be attributed to a reduction in carotid pulse pressure. No significant changes were observed in plasma vasoconstrictor hormones or carotid artery vasoreactivity following the interventions. CONCLUSION: Thirteen weeks of moderate ST two or three times per week does not reduce central arterial compliance in middle-aged and older adults.

Resistance training increases basal limb blood flow and vascular conductance in aging humans.

Age-related reductions in basal limb blood flow and vascular conductance are associated with the metabolic syndrome, functional impairments, and osteoporosis. We tested the hypothesis that a strength training program would increase basal femoral blood flow in aging adults. Twenty-six sedentary but healthy middle-aged and older subjects were randomly assigned to either a whole body strength training intervention group (52 +/- 2 yr, 3 men, 10 women) who underwent three supervised resistance training sessions per week for 13 wk or a control group (53 +/- 2 yr, 4 men, 9 women) who participated in a supervised stretching program. At baseline, there were no significant differences in blood pressure, cardiac output, basal femoral blood flow (via Doppler ultrasound), vascular conductance, and vascular resistance between the two groups. The strength training group increased maximal strength in all the major muscle groups tested (P < 0.05). Whole body lean body mass increased (P < 0.05) with strength training, but leg fat-free mass did not. Basal femoral blood flow and vascular conductance increased by 55-60% after strength training (both P < 0.05). No such changes were observed in the control group. In both groups, there were no significant changes in brachial blood pressure, plasma endothelin-1 and angiotensin II concentrations, femoral artery wall thickness, cardiac output, and systemic vascular resistance. Our results indicate that short-term strength training increases basal femoral blood flow and vascular conductance in healthy middle-aged and older adults.

Cigarette smoking, regular exercise, and peripheral blood flow.

Acute and chronic smoking reduces peripheral blood flow and shear stress, contributing to the increased incidence of peripheral arterial disease in smokers. Currently, it is not known whether physical activity status influences peripheral blood flow among chronic smokers. Blood flow was measured using Doppler ultrasound on the common femoral artery in nine young otherwise healthy sedentary smokers (eight males/one female) and nine physically-active smokers (six males/three females). Physically-active smokers performed strenuous exercise 4.4 times/week for 8 h/week. No significant differences in body fat, blood pressure, and total cholesterol were observed between groups. Basal femoral artery blood flow was approximately 50% higher in physically-active smokers compared with sedentary smokers (259+/-108 ml min(-1) versus 173+/-47 ml min(-1), P<0.05). The higher basal femoral artery blood flow in physically-active smokers compared with sedentary smokers was associated with a 47% higher femoral artery vascular conductance (2.99+/-1.2 U versus 2.03+/-0.5 U, P<0.05) and a 39% lower vascular resistance (0.38+/-0.13 U versus 0.53+/-0.15 U, P<0.05). Cardiac output, systemic vascular resistance, femoral intima-media thickness, and plasma norepinephrine concentration were not different between the groups. We concluded that smokers who habitually perform physical activity demonstrate greater levels of peripheral blood flow and peripheral vascular conductance. The findings from the present cross-sectional study suggest that chronic smokers may be able to negate, at least in part, the adverse effects of chronic smoking on the peripheral vasculature by performing regular physical activity.

Acute effects of resistance exercise on arterial compliance.

Decreased central arterial compliance is an emerging risk factor for cardiovascular disease. Resistance training is associated with reductions in the elastic properties of central arteries. Currently, it is not known whether this reduction is from one bout of resistance exercise or from an adaptation to multiple bouts of resistance training. Sixteen healthy sedentary or recreationally active adults (11 men and 5 women, age 27 +/- 1 yr) were studied under parallel experimental conditions on 2 separate days. The order of experiments was randomized between resistance exercise (9 resistance exercises at 75% of 1 repetition maximum) and sham control (seated rest in the exercise room). Baseline hemodynamic values were not different between the two experimental conditions. Carotid arterial compliance (via simultaneous B-mode ultrasound and applanation tonometry) decreased and beta-stiffness index increased (P < 0.01) immediately and 30 min after resistance exercise. Immediately after resistance exercise, carotid systolic blood pressure increased (P < 0.01), although no changes were observed in brachial systolic blood pressure at any time points. These measures returned to baseline values within 60 min after the completion of resistance exercise. No significant changes in these variables were observed during the sham control condition. These results indicate that one bout of resistance exercise acutely decreases central arterial compliance, but this effect is sustained for <60 min after the completion of resistance exercise.