The relationship between physical activity and lymphoma: a systematic review and meta analysis

Causal association of physical activity with lymphoma risk: a Mendelian randomization analysis

Controversial relationship of physical activity with lower lymphoma risk has been reported in observational studies. The purpose of this study was to explore the causal correlation of physical activity with lymphoma risk using two-sample Mendelian randomization (MR). Genetic variants associated with physical activity (moderate-to-vigorous physical activity (MVPA), average acceleration physical activity, number of days/week of moderate physical activity 10+ min, and number of days/week of vigorous physical activity 10+ min) and lymphoma [overall lymphoma, Hodgkin lymphoma, mature T/NK-cell lymphomas, diffuse large B-cell lymphoma (DLBCL), and follicular lymphoma] were obtained from published genome-wide association studies (GWAS) and the FinnGen database and used as instrumental variables. Primary results were based on inverse variance-weighted (IVW) analysis and were described as odds ratio (OR) and 95% confidence interval (CI). Higher levels of genetically predicted MVPA (OR = 0.079, 95% CI: 0.021-0.300, P = 0.0002) and number of days/week of vigorous physical activity 10+ min (OR = 0.237, 95% CI: 0.098-0.573, P = 0.0014) were negatively associated with Hodgkin lymphoma risk. There was a weak negative association between high levels of genetically predicted MVPA (OR = 0.114, 95% CI: 0.015-0.856, P = 0.0348) and average acceleration physical activity (OR = 0.830, 95% CI: 0.705-0.976, P = 0.0243) and risk of DLBCL. No causal relationship was observed between physical activity and the risk of overall lymphoma, mature T/NK-cell lymphomas, and follicular lymphoma (P > 0.05). This study supported the causal relationship between higher physical activity levels and lower risks of Hodgkin lymphoma and DLBCL.

Is Physical Exercise Beneficial for People with Primary Sjögren’s Syndrome? Findings from a Systematic Review

Background: The aim of the study was to identify and critically evaluate the best available evidence on the impact of physical exercise on patients with primary Sjögren’s syndrome. Methods: Studies were searched in four electronic databases (PubMed, Web of Science, Scopus, and SportDiscus) from their inception up to September 2024. The methodological quality of the included studies was assessed using the 10-point Physiotherapy Evidence Database (PEDro) scale and the Methodological Index for Non-Randomized Studies (MINORS). Results: A total of four randomized controlled trials and one comparative study were analyzed. The training programs evaluated varied in duration, ranging from 12 to 28 weeks. Exercise was found to have a positive intra-group impact on fatigue, quality of life, and functional capacity. However, exercise does not demonstrate superior effects compared to standard treatment for improving quality of life and disease impact. Conclusions: It is essential to increase the number of studies involving individuals with primary Sjögren’s syndrome across various exercise conditions to more comprehensively evaluate the potential benefits.

Relationship between Psychosocial Factors and Physical Activity among Undergraduate Students from a South African University

Psychosocial factors such as mental health, motivation, and social support are key determinants of behavior that play a significant role in physical activity participation. Limited studies have investigated the relationship between psychosocial factors and physical activity among university students in Africa. The aim of this study was to determine the relationship between psychosocial factors and physical activity participation among undergraduate university students at a historically disadvantaged university (HDU) in South Africa. This was a cross-sectional study that used convenience sampling (n = 534, majority female, 53.6% with a mean age of 20.69). The study was conducted through an online, self-administered, and hard-copy, valid questionnaire in September 2022. Data on sociodemographic information were collected. Psychosocial factors were assessed using the Depression, Anxiety, and Stress-21 Scale for mental health, the Physical Activity and Leisure Motivation Scale for motivation, and the Perceived Social Support Scale for social support. Physical activity (calculated as MET-min/week) was assessed using the international physical activity questionnaire in short form. Results revealed that almost a third (29%) of undergraduate students were physically inactive, 31.1% were minimally active, and 39.9% were in the health-enhancing category. Physical activity was positively related to stress (r = 0.11, p < 0.05) and anxiety (r = 0.10, p < 0.05). Motivational factors were positively related to psychological condition and others' expectations (r = 0.10, p < 0.05), and depression and others' expectations (r = 0.11, p < 0.05). Results from this study highlighted that psychosocial factors were related to physical activity participation among undergraduate university students. Psychosocial factors should be considered a coping mechanism when implementing health-promoting strategies.

Lifetime occupational and recreational physical activity and risk of lymphoma subtypes. Results from the European Epilymph case-control study

Physical activity is known to convey protection against several cancers. However, results on the risk of lymphoma overall and its subtypes have been inconsistent. The aim of this study was to investigate occupational and recreational physical activity in relation to risk of lymphoma subtypes adjusting for established occupational risk factors. We applied standardized tools to assess energy expenditure at work and in recreational physical activities to the questionnaire information on lifetime work and exercise history in 1117 lymphoma cases, including Hodgkin lymphoma, and B-cell (including chronic lymphocytic leukemia, and multiple myeloma) and T-cell non-Hodgkin's lymphoma (NHL) subtypes, and 1207 controls who took part in the multicentre European EpiLymph case-control study. We calculated the risk of lymphoma (all subtypes), B-cell NHL and its most represented subtypes, and Hodgkin's lymphoma (all subtypes) associated with weekly average Metabolic Equivalent of Task (MET-hours/week) and cumulative MET-hours of lifetime recreational, occupational, and total physical activity, with unconditional logistic regression and polytomous regression analysis adjusting by age, centre, sex, education, body mass index, history of farm work and solvent use. We observed an inverse association of occupational, and total physical activity with risk of lymphoma (all subtypes), and B-cell non-Hodgkin's lymphoma among women, and an upward trend in risk of Hodgkin's lymphoma with recreational and total physical activity among men, for which we cannot exclude chance or bias. Our results suggest no effect of overall physical activity on risk of lymphoma and its subtypes.

Physical activity and the risk of non-Hodgkin lymphoma subtypes: A pooled analysis

Non-Hodgkin lymphoma (NHL) is composed of a heterogeneous collection of subtypes with considerable differences in genetics, biology and aetiology. Studies to date on physical activity and NHL risk have not had sufficient sample size to evaluate whether associations differ by subtype. We pooled data from nine case-control studies to examine the association between moderate-to-vigorous intensity physical activity (MVPA) and risk of NHL overall and by subtype (diffuse large B-cell lymphoma, follicular lymphoma, chronic lymphocytic leukaemia/small lymphocytic lymphoma, marginal zone lymphoma and mature T-cell lymphoma). A total of 5653 cases and 9115 controls were included in the pooled analysis. Physical activity was harmonised across nine studies and modelled as study-specific tertiles. Multinomial logistic regression was used to estimate the association between physical activity and NHL, adjusting for confounders. The overall odds of NHL was 13% lower among participants in the most active tertile of MVPA compared to the least active tertile (adjusted odds ratio = 0.87, 95% CI = 0.80, 0.95). Similar decreases were observed across NHL subtypes. In summary, in this pooled analysis of case-control studies, physical activity was associated with a modest risk reduction for each NHL subtype examined and with overall NHL.

Assessment of Subjective Well-Being in a Cohort of University Students and Staff Members: Association with Physical Activity and Outdoor Leisure Time during the COVID-19 Pandemic

Time spent outdoors and physical activity (PA) promote mental health. To confirm this relationship in the aftermath of COVID-19 lockdowns, we explored individual levels of anxiety, depression, stress and subjective well-being (SWB) in a cohort of academic students and staff members and tested their association with sport practice, PA at leisure time and time spent outdoors. Our cross-sectional study collected data during the COVID-19 outbreak (April−May 2021) on 939 students and on 238 employees, who completed an online survey on sociodemographic and lifestyle features, depression, anxiety, stress, and SWB. Results showed that the students exhibited higher levels of anxiety, depression, and stress, and lower levels of SWB (p < 0.001 for all domains) compared to the staff members. Correlation analysis confirmed that PA and time spent in nature were associated to high mental health scores among staff and, more consistently, among students. Finally, mediation analyses indicated that the time spent in nature, social relationships, and levels of energy play a mediator role in the relationship between sport practice and SWB. Our evidence reinforces the protective role of time spent in nature in improving mental health, and provides support for policymakers to make appropriate choices for a better management of COVID-19 pandemic consequences.