BackgroundThere is compelling evidence for the benefits of regular exercise during pregnancy, and medical practitioners (MPs) can play an important role in changing antenatal health behaviours. The purpose of this study was to assess the knowledge, attitudes and beliefs of South African MPs towards exercise during pregnancy.MethodsA convenience sample of ninety-six MPs working in the private health care sector, including General Practitioners (n = 58), Obstetricians/Gynaecologists (n = 33) and other Specialists (n = 5), participated in this cross sectional, descriptive survey study. A 33-item questionnaire was distributed manually at medical practices and via email to an on-line survey tool. Descriptive statistics and frequency tables were calculated for all questions. Chi-squared and Fisher’s exact statistical tests were used to determine the differences in response by age, speciality and years of practice (p < 0.05).ResultsThe majority of practitioners (98 %) believe that exercise during pregnancy is beneficial, and were knowledgeable on most of the expected benefits. Seventy-eight percent believed that providing exercise advice is an important part of prenatal care, however only 19 % provided informational pamphlets and few (24 %) referred to exercise specialists. A large majority (83 %) were unaware of the recommended exercise guidelines. Although age and years of practice played no role in this awareness, practitioners who focussed on obstetrics and gynaecology were more likely to be aware of the current guidelines, than those in general practice (p < 0.001).ConclusionAlthough the MPs were largely positive towards exercise during pregnancy, their advice did not always align with the current guidelines. Therefore, better dissemination of available research is warranted, to bridge the gap between clinical knowledge and current recommendations for physical activity promotion.Electronic supplementary materialThe online version of this article (doi:10.1186/s12884-015-0690-1) contains supplementary material, which is available to authorized users.

Introduction. The environment of youth sport in South Africa has transformed considerably, where adolescent athletes are faced with more pressure from coaches, peers and parents to perform well. Some of the athletes are using nutritional supplements or prohibited means such as doping to cope with these pressures and gain an edge in competition. Objectives. In view of the lack of literature investigating the use of doping in South African adolescents, the objective of the study was to determine the attitudes and perceptions of male adolescent athletes regarding performance-enhancing substance (PES) use. Methods. The design of the study was cross-sectional and used a self-administered questionnaire. A sample of participants was obtained from male adolescent high school athletes involved in 1st and 2nd high school sports teams in Johannesburg boys high schools. Participants were invited to volunteer to participate in the study. Questionnaires were completed under conditions that were similar to an examination situation. Demographic data were analysed using descriptive statistics. Results. The majority (91%) of the athletes indicated a belief that the number of athletes using PES in sport is increasing. Eightyfour per cent of them felt that there was pressure placed on them to use PES to win. Only 55% of respondents believed that doping tests would prohibit the use of banned substances and 91% did not believe that the sale of prohibited substances should be banned. The majority (88%) believed there is a need for further education. Conclusion. Although there is enormous pressure on high school boys to use PES, their knowledge is lacking, especially with regard to doping in sport.

Background: High-intensity training is comprised of sprint interval training (SIT) and high-intensity interval training (HIIT). This study compared high-intensity training with moderate-intensity continuous training (MICT) on cardiorespiratory fitness (CRF) and body fat percentage for overweight or obese persons. Methods: A systematic search of randomized controlled trials using the health science databases occurred up to April, 2020. Twenty-six studies were included for complete analysis. A total of 784 participations were analyzed. The unstandardized mean difference for each outcome measurement was extracted from the studies and pooled with the random effects model. Results: MICT was significantly better at improving CRF compared with SIT (mean difference = −0.92; 95% confidence interval, −1.63 to −0.21; P = .01; I2 = 10%). Furthermore, there was no significant difference between MICT versus HIIT on CRF (mean difference = −0.52; 95% confidence interval, −1.18 to 0.13; P = .12; I2 = 23%). There was no significant difference in body fat percentage between MICT versus HIIT and MICT versus SIT. Conclusions: MICT was significantly better at improving CRF than SIT in overweight or obese persons.

Introduction Use of tenofovir based anti-retroviral therapy (ART) in HIV patients is associated with low bone mineral density (BMD). Low BMD predisposes people living with HIV (PLWHIV) to fractures thereby increasing morbidity and mortality. Since the introduction of tenofovir based ARV regimens in 2011, information on the prevalence of low BMD in PLWHIV and receiving ART is still scarce in Malawi. This study aimed to determine the prevalence and associated factors of low BMD among adults living with HIV and receiving ART in Blantyre, Malawi. Methodology This was a cross sectional study involving 282 HIV-positive adults of whom 102 (36%) were males. The participants aged 18-45 years were recruited from three primary and one tertiary health care facilities. Patients with no other comorbidities or conditions associated with low BMD and on ART >12 months were included. Data on BMD (femoral neck and lumbar spine) were collected using Dual-Energy X-ray Absorptiometry (DEXA). The International Physical Activity Questionnaire (IPAQ) was used to assess the physical activity (PA) levels. Participants' body weight (kg) and height (m) were also measured. Descriptive statistics, Chi-Square test and multivariable logistic regression were used to analyse data. Results Mean age of participants was 37(± 6.4) years, mean duration on ART was 5(± 3.5) years and mean body mass index (BMI) was 23(± 4.5) kg/m 2. Twenty percent (55) had reduced BMD. More males (28%) had reduced BMD than females (14%) (p = 0.04). There was a significant association between lumbar BMD and femoral neck BMD (r = 0.66,p<0.001).