The Relationship between Intact Parathyroid Hormone Levels and Daily Physical Activity in Hemodialysis Patients

Factors associated with dropout from physical function assessment programs among participants receiving maintenance hemodialysis: A retrospective observational cohort study

We aimed to investigate the factors associated with dropout from a physical function assessment program among participants receiving outpatient hemodialysis (HD). The participants were divided into continuation and dropout groups and followed up for 3 years after the initial physical function assessment. Multivariate logistic regression analyses were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs) for the dropout group to determine the factors associated with dropout from the physical function assessment program. The continuation and dropout groups included 43 and 58 participants, respectively. The continuation group had a significantly higher self-efficacy (SE) and age than the dropout group (p = 0.001, p = 0.047). Multivariate logistic regression analysis indicated that only SE (OR: 1.202, 95% CI: 1.082-1.334) remained a significant predictor after adjustment (p < 0.05). There is a need to evaluate SE to prevent dropout from physical functioning assessment programs.

Impact of hemodialysis and post-dialysis period on granular activity levels

Background

Physical activity (PA) is typically lower on hemodialysis (HD) days. Albeit intradialytic inactivity is expected, it is unknown whether recovery after HD contributes to low PA. We investigated the impact of HD and post-HD period on granular PA relative to HD timing.

Methods

We used baseline data from the HDFIT trial conducted from August 2016 to October 2017. Accelerometry measured PA over 1 week in patients who received thrice-weekly high-flux HD (vintage 3 to 24 months), were clinically stable, and had no ambulatory limitations. PA was assessed on HD days (0 to ≤24 h after start HD), first non-HD days (> 24 to ≤48 h after start HD) and second non-HD day (> 48 to ≤72 h after start HD). PA was recorded in blocks/slices: 4 h during HD, 0 to ≤2 h post-HD (30 min slices), and > 2 to ≤20 h post-HD (4.5 h slices). Blocks/slices of PA were captured at concurrent/parallel times on first/second non-HD days compared to HD days.

Results

Among 195 patients (mean age 53 ± 15 years, 71% male), step counts per 24-h were 3919 ± 2899 on HD days, 5308 ± 3131 on first non-HD days (p < 0.001), and 4926 ± 3413 on second non-HD days (p = 0.032). During concurrent/parallel times to HD on first and second non-HD days, patients took 1308 and 1128 more steps (both p < 0.001). Patients took 276 more steps and had highest rates of steps/hour 2-h post-HD versus same times on first non-HD days (all p < 0.05). Consistent findings were observed on second non-HD days.

Conclusions

PA was higher within 2-h of HD versus same times on non-HD days. Lower PA on HD days was attributable to intradialytic inactivity. The established PA profiles are of importance to the design and development of exercise programs that aim to increase activity during and between HD treatments.

Trial registration

HDFIT was prospectively registered 20 April 2016 on ClinicalTrials.gov (NCT02787161)

Relationships between Neighborhood Walkability and Objectively Measured Physical Activity Levels in Hemodialysis Patients

BACKGROUND/AIMS

Neighborhood walkability is associated with indicators of health in the general population. We explored the association between neighborhood walkability and daily steps in hemodialysis (HD) patients.

METHODS

We measured daily steps over 5 weeks using Fitbit Flex (Fitbit, San Francisco, CA, USA) and retrieved Walk Score® (WS) data by patient's home ZIP code (www.walkscore.com; 0 = poorest walkability; 100 = greatest walkability).

RESULTS

HD patients took a mean of 6,393 ± 3,550 steps/day (n = 46). Median WS of the neighborhood where they resided was 28. Patients in an above-median WS (n = 27) neighborhood took significantly more daily steps compared to those (n = 19) in a below-median WS neighborhood (7,514 ± 3,900 vs. 4,800 ± 2,228 steps/day; p < 0.001, t test). Daily steps and WS were directly correlated (R = 0.425; p = 0.0032, parametric test; R = 0.359, p = 0.0143, non-parametric test).

CONCLUSION

This is the first study conducted among HD patients to indicate a direct relationship between neighborhood walkability and the actual steps taken. These results should be considered when designing initiatives to increase and improvise exercise routines in HD populations.

[Exercise as a protective cardiovascular and metabolic factor in end stage renal disease patients]

OBJECTIVE

The aim of the study was to test the effectiveness of Physical Activity (PA) during haemodialysis as a protective treatment against cardiovascular (CV) diseases.

METHODS

Eighty volunteer patients were included in this multicentric prospective study and followed for two years: 40 patients in the Exercise group (EX), 40 patients in the Control group (Ctrl). CV risk factors: Total Cholesterol, HDL Cholesterol (HDL-c), LDL cholesterol (LDL-c), Triglycerides (TG) and Hemoglobin (Hb), and Prealbumin, Albumin, Parathormon, 25-OH Vitamin D, were checked at Month 0 (M0) and Month 24 (M24). The number of antihypertensive treatments and the Erythropoietin Stimulating Agent (ESA) required doses were collected. We noted for each group during the follow-up the number of hospitalizations for CV reasons. After two years, we compared 31 patients in EX and 35 in Ctrl.

RESULTS

We observed a significant decrease of total cholesterol EX group: 1.86±0.49g/L at M0 versus 1.64±0.38g/L at M24 (P<0.05). HDLc and but LDL-c remained stable in both groups. TG decreased significantly in EX: 1.76±0.89g/L vs 1.44±0.69g/L (P<0.05). The number of antihypertensive drugs per patient decreased significantly (P<0.05) in the EX group between M0 and M24 (1.61±1.28 at M0 and 0.74±0.85 at M24). The EX patients were three times less frequently hospitalized for cardiovascular reasons. There were five hospital stays versus 14 for the Ctrl group.

CONCLUSION

Our study demonstrates that an intradialytic aerobic cycling training program promotes beneficial effects on cardiovascular protection. Physical activity reduced the number of CV events in our population during two years follow-up.