Pre- to postoperative changes in physical activity: report from the longitudinal assessment of bariatric surgery-2 (LABS-2)

Influences of general self-efficacy and weight bias internalization on physical activity in bariatric surgery candidates

BACKGROUND

Physical activity (PA) seems to be important for long-term weight loss after bariatric surgery; however, studies provide evidence for insufficient PA levels in bariatric patients. Research found self-efficacy to be associated with PA and weight bias internalization, for which an influence on mental and physical health has been shown in recent studies. The purpose of the present study was to investigate the influence of general self-efficacy on PA, mediated by weight bias internalization.

METHODS

In 179 bariatric surgery candidates, general self-efficacy, weight bias internalization, and different intensities of PA were assessed by self-report questionnaires. Structural equation modeling was used to analyze the assumed mediational relationship.

RESULTS

After controlling for sociodemographic variables, weight bias internalization fully mediated the association between general self-efficacy and moderate-intense as well as vigorous-intense PA. Lower general self-efficacy predicted greater weight bias internalization, which in turn predicted lower levels of moderate-intense and vigorous-intense PA.

CONCLUSIONS

The results suggest an influence of weight bias internalization on preoperative PA in bariatric surgery candidates. Subsequently, implementation of interventions addressing weight bias internalization in the usual treatment of bariatric surgery candidates might enhance patients' preoperative PA, while longitudinal analyses are needed to further examine its predictive value on PA after bariatric surgery.

Patterns of physical activity and sedentary behavior after bariatric surgery: an observational study

BACKGROUND

Engaging in low levels of physical activity (PA) and accumulating prolonged periods of sedentary behavior (SB) during daily life have been associated with deleterious health outcomes. The objective of this study was to undertake an analysis of the way in which PA and SB were accumulated after bariatric surgery.

METHODS

Adults 12 to 18 months after laparoscopic adjustable gastric banding or 6 to 18 months after laparoscopic sleeve gastrectomy wore 2 activity monitors during the waking hours for 7 days. Anthropometric and demographic data were recorded.

RESULTS

Data were available on 40 participants (30 females; median ± interquartile range: age 46 ± 16 years, time since surgery 14 ± 8 months, body mass index 36 ± 9 kg/m(2)). The proportion of waking hours spent in SB, light PA, moderate PA, and vigorous PA was 72% ± 12%, 22% ± 9%, 5% ± 3% and 0% ± 0%, respectively. Half of the time in SB was accumulated in uninterrupted bouts ≥ 30 minutes. Almost all PA was accumulated in bouts<10 minutes in duration. The median daily step count was 9108 ± 4360. The proportion of people who completed an average of ≥ 10,000 steps/d was similar to that reported in Western Australian adults (39% versus 32%; P = .35).

CONCLUSION

Our sample spent>70% of time in SB, half of which was accumulated in uninterrupted bouts ≥ 30 minutes. Very little time was spent in moderate or vigorous PA (5%), and this was accumulated in short bouts (<10 minutes). Healthcare professionals should target not just overall time in SB and PA, but also aim to reduce prolonged periods of SB and increase sustained periods of PA.

A systematic review of musculoskeletal pain among bariatric surgery patients: implications for physical activity and exercise

BACKGROUND

Physical activity (PA) can play an integral role in protecting the success of bariatric surgery by promoting weight loss and preventing weight regain. Although engagement in PA before surgery predicts postoperative PA levels, this may be undermined by weight-related co-morbidities. The importance of preoperative and postoperative musculoskeletal pain as a limitation to PA is unknown. The objective of this study was to review evidence on preoperative and postoperative pain in bariatric surgery patients, summarize the relationship between musculoskeletal pain and PA, and discuss areas of future research.

METHODS

The MEDLINE database was searched for published articles on musculoskeletal pain in bariatric surgery patients from January 1946 through December 2012. Outcomes of interest included preoperative pain prevalence, postoperative pain prevalence and incidence, and preoperative to postoperative changes in pain.

RESULTS

Preoperative musculoskeletal pain is highly common among candidates for bariatric surgery. Most individuals with presurgical pain experience significant improvement postoperatively. However, the characteristics of pain sufferers vary and few risk factors have been identified. New pain issues that present postsurgically are limited primarily to neurologic complications and are not common. To date, no study has tested the hypothesis that pain is a barrier to PA levels in bariatric surgery patients.

CONCLUSIONS

Gaps in knowledge regarding pain in bariatric surgery patients may present challenges for clinicians and exercise professionals on how to best advise patients about increasing their PA. Future research should include prospective evaluation of musculoskeletal pain via validated measures at multiple time points. This data will inform the time course of pain resolution, potential onset, and correlation with surgical weight loss.

The importance of preoperative and postoperative physical activity counseling in bariatric surgery

There is increasing evidence that physical activity (PA) can enhance weight loss and other outcomes after bariatric surgery. However, most preoperative patients are insufficiently active and, without support, fail to make substantial increases in their PA postoperatively. This review provides the rationale for PA counseling in bariatric surgery and describes how to appropriately tailor strategies to preoperative and postoperative patients.

Walking capacity of bariatric surgery candidates

BACKGROUND

This study characterizes the walking limitations of bariatric surgery candidates by age and body mass index (BMI) and determines factors independently associated with walking capacity. The setting was multi-institutional at research university hospitals in the United States.

METHODS

Participants of the Longitudinal Assessment of Bariatric Surgery study (n=2458; age 18-78 yr, BMI 33-94 kg/m(2)) attended a preoperative research visit. Their walking capacity was measured by self-report and the 400 m Long Distance Corridor Walk (LDCW).

RESULTS

Almost two thirds (64%) of subjects reported limitations with walking several blocks, 48% had an objectively defined mobility deficit, and 16% reported at least some walking aid use. In multivariate analysis, BMI, older age, lower income, and greater bodily pain were independently associated (P < .05) with walking aid use, physical discomfort during the LDCW, an inability to complete the LDCW, and a slower time to complete the LDCW. Female gender, Hispanic ethnicity (but not race), greater heart rate at rest, a history of smoking, several co-morbidities (history of stroke, ischemic heart disease, diabetes, asthma, sleep apnea, venous edema with ulcerations), and depressive symptoms were also independently related (P < .05) to at least one measure of reduced walking capacity.

CONCLUSIONS

Walking limitations are common in bariatric surgery candidates, even among the least severely obese and youngest patients. Physical activity counseling must be tailored to individuals' abilities. Although several factors identified in the present study (eg, BMI, age, pain, co-morbidities) should be considered, directly assessing the patient's walking capacity will facilitate appropriate goal setting.