M. Swanepoel

Optimizing waist circumference cut-points for the metabolic syndrome in a South African cohort at 3-year follow-up: the SABPA prospective cohort.

Central obesity is at the heart of the rising epidemic of the metabolic syndrome (MetS) [1]; however, progress is slow toward the development of ethnic-specific waist circumference (WC) cut-points. MetS is currently defined by the joint interim statement (JIS) [2] but the optimal WC cutpoint has not yet been developed for Africans. Using other WC criteria to classify African populations can either underor overestimate the presence of the MetS. Preliminary WC cut-points have been suggested for various African populations with regard to the MetS as well as hypertension (HT) [3–6]. These cut-points differ between the different African populations and emphasize the need to develop cut-points specific to our cohort. It is necessary to determine whether JIS WC corresponds to WC cut-points specific to our African cohort and if these WC cut-points can identify the presence of the MetS. The aim was thus to contribute to the development of WC cut-points for Africans. Participants and methods

The health benefits and constraints of exercise therapy for wheelchair users: a clinical commentary

Background There are approximately 1 billion people living with chronic lower limb disability, many of whom are wheelchair users. Objectives Review cardiometabolic and neuromuscular risk profiles of wheelchair users, benefits of regular exercise and the causes of neuromuscular upper limb and hip injuries that hinder regular adherence. Method Literature published between 2013 and 2017 was adopted according to the standard practices for systematic reviews (PRISMA) through Crossref Metadata and Google Scholar searches. Individual paper quality was evaluated using a modified Downs and Black Appraisal Scale. Results The literature search identified 16 600 papers which were excluded if they were non-English, non-peer-reviewed or published before 2013. Finally, 25 papers were accepted, indicating that sedentary wheelchair users have poor cardiometabolic risk profiles (PCMRP) because of a lack of physical activity, limiting their quality of life, characterised by low self-esteem, social isolation and depression. Their predominant mode of physical activity is through upper limb exercises, which not only improves their cardiometabolic risk profiles but also precipitates neuromuscular upper limb overuse injuries. The primary cause of upper limb injuries was attributed to poor wheelchair propulsion related to incorrect chair setup and poor cardiorespiratory fitness. Conclusion Wheelchair users have a high body mass index, body fat percentage and serum lipid, cholesterol and blood glucose concentrations. Empirical investigations illustrate exercise improves their PCMRP and cardiorespiratory fitness levels. Although literature encourages regular exercise, none discusses the need to individualise chair setup in order to eliminate wheelchair pathomechanics and upper limb neuromuscular injuries. Wheelchair users must be encouraged to consult a biokineticist or physiotherapist to review their wheelchair setup so as to eliminate possible incorrect manual wheelchair propulsion biomechanics and consequent overuse injuries.

An Exercise Rehabilitative Solution to Work-Related Musculoskeletal Lower Back Pain among Nurses

The attrition of professional nurses is a sad reality. Work-related musculoskeletal lower back pain (WRMLBP) among nurses has been cited as a factor of increased sick leave and poor health. Occupational predisposing factors of lower back pain are strenuous physical stresses of nursing, obesity and poor physical conditioning. Regular stretching and strengthening exercises dissipate lower back pain. This commentary’s objectives are to explain the association between obesity and lower back pain and the exercise mechanism that dissipates this pain, thereby concluding that nurses should consider regular exercise as a therapeutic option.

The benefits of hydrotherapy to patients with spinal cord injuries

Background Many patients with spinal cord injury (PWSCI) lead sedentary lifestyles, experiencing poor quality of life and medical challenges. PWSCI don’t like to participate in land-based-exercises because it’s tedious to perform the same exercises, decreasing their rehabilitative compliance and negatively impacting their well-being. An alternative exercise environment and exercises may alleviate boredom, enhancing compliance. Objectives Discuss the benefits of hydrotherapy to PWSCI concerning underwater gait-kinematics, thermoregulatory and cardiovascular responses and spasticity. Methodology A literature surveillance was conducted between 1998 and 2017, through the Crossref meta-database and Google Scholar, according to the PRISMA procedures. Key search words were water-therapy, aquatic-therapy, hydrotherapy, spinal cord injury, rehabilitation, human, kinematics, underwater gait, cardiorespiratory, thermoregulation and spasticity. The quality of each paper was evaluated using a modified Downs and Black Appraisal Scale. The participants were records pertaining to PWSCI and hydrotherapy. The outcomes of interest were: hydrotherapy interventions, the impact of hydrotherapy on gait-kinematics, thermoregulation during water submersion and cardiorespiratory function of PWSCI. Omitted records included: non-English publications from before 1998 or unrelated to hydrotherapy and PWSCI. The record screening admissibility was performed as follows: the title screen, the abstract screen and the full text screen. Results Literature search identified 1080 records. Upon application of the exclusion criteria, 92 titles, 29 abstracts and 17 full text records were eligible. Only 15 records were selected to be included in this clinical commentary. Evidence shows a paucity of randomised control trials (RCT) conducted in this field. Conclusion Hydrotherapy improves PWSCI underwater gait-kinematics, cardiorespiratory and thermoregulatory responses and reduces spasticity.

The association between seven-day objectively measured habitual physical activity and 24 h ambulatory blood pressure: the SABPA study

Few studies have examined objective physical activity in relation to 24 h ambulatory blood pressure (BP). We aimed to assess the association of 7-day objectively measured habitual physical activity with ambulatory BP in a sample of African and Caucasian school teachers (n=216, age 49.7 years) from the sympathetic activity and blood pressure in Africans prospective cohort study. Hypertension (ambulatory systolic BP⩾130 and/or diastolic BP⩾80 mm Hg) was prevalent in 53.2% of the sample, particularly in black Africans. The hypertensive group spent significantly more awake time in sedentary activity (51.5% vs 40.8% of waking hours, P=0.001), as well as doing less light- (34.1% vs 38.9%, P=0.043) and moderate-intensity (14.0% vs 19.7%, P=0.032) activities compared with normotensives, respectively. In covariate adjusted models, light-intensity activity time was associated with lower 24 h and daytime ambulatory systolic BP (β=−0.15, 95% confidence interval (CI): −0.26, −0.05, P=0.004; β=−0.14, CI: −0.24, −0.03, P=0.011) and diastolic BP (β=−0.14, CI: −0.25, −0.03, P=0.015; β=−0.13, CI: −0.24, −0.01, P=0.030), as well as resting systolic BP (β=−0.13, CI: −0.24, −0.01, P=0.028). Sedentary time was associated only with 24 h systolic BP (β=0.12; CI: 0.01, 0.22), which was largely driven by night-time recordings. Participants in the upper sedentary tertile were more likely to be ‘non-dippers’ (odds ratio=2.11, 95% CI: 0.99, 4.46, P=0.052) compared with the lowest sedentary tertile. There were no associations between moderate to vigorous activity and BP. In conclusion, objectively assessed daily light physical activity was associated with ambulatory BP in a mixed ethnic sample.