Partial body cryotherapy exposure drives acute redistribution of circulating lymphocytes: preliminary findings.

Partial body cryotherapy (PBC) is proposed to alleviate symptoms of exercise-induced muscle damage (EIMD) by reducing associated inflammation. No studies have assessed acute PBC exposure on peripheral blood mononuclear cell mobilisation or compared these with cold water immersion (CWI), which may inform how PBC impacts inflammatory processes. This trial examined the impact of a single PBC exposure on circulating peripheral blood mononuclear cells compared to CWI or a control. 26 males were randomised into either PBC (3 min at - 110 to - 140 °C), CWI (3 min at 9 °C), or control (3 min at 24 °C), with blood samples, heart rate, and blood pressure taken before and after exposure. Cytometric analysis determined that CD8+ T-cell populations were significantly elevated after treatments, with PBC increasing CD8+ T cells to a greater degree than either CWI or CON. Natural killer cell counts were also elevated after PBC, with the increase attributed specifically to the CD56loCD16+ cytotoxic subset. This provides the first evidence for the effect of PBC exposure on redistribution of immune cells. An increase in circulating leukocyte subsets such as CD8+ T cells and CD56loCD16+ natural killer cells suggests that PBC may induce a transient mobilisation of lymphocytes. PBC may thus enable a more efficient trafficking of these cells from the circulation to the site of initial cellular insult from exercise, potentially accelerating the process of cellular recovery. This provides novel evidence on the use of PBC as a recovery treatment and may also have applicability in other clinical settings involving the recovery of damaged skeletal muscle.

Improving access to public physical activity events for disadvantaged communities in Australia.

BACKGROUND: Physical activity has numerous health benefits, but participation is lower in disadvantaged communities. 'parkrun' overcomes one of the main barriers for disadvantaged communities, the cost of activities, by providing a free, regular community-based physical activity event for walkers, runners and volunteers. This study assesses equity of access (in terms of distance to the nearest parkrun) stratified by socioeconomic deprivation, and identifies the optimal location for 100 new events to increase equity of access. METHODS: We combined information about population location and socioeconomic deprivation, with information about the location of 403 existing parkrun events, to assess the current level of access by deprivation quintile. We then used a two-step location-allocation analysis (minimising the sum of deprivation-weighted distances) to identify optimal regions, then optimal towns within those regions, as the ideal locations for 100 new parkrun events. RESULTS: Currently, 63.1% of the Australian population lives within 5 km of an event, and the average distance to an event is 14.5 km. A socioeconomic gradient exists, with the most deprived communities having the largest average distance to an event (27.0 km), and the least deprived communities having the best access (living an average 6.6 km from an event). Access improves considerably after the introduction of new event locations with around 68% of the population residing within 5 km of an event, and the average distance to the nearest event approximately 8 km. Most importantly, the improvement in access will be greatest for the most deprived communities (now an average 11 km from an event). CONCLUSIONS: There is a socioeconomic gradient in access to parkrun events. Strategic selection of new parkrun locations will improve equity of access to community physical activity events, and could contribute to enabling greater participation in physical activity by disadvantaged communities.

"We Don't Have to Do Things the Way They've Been Done Before"; Mixed-Method Evaluation of a National Grant Program Tackling Physical Inactivity through Sport.

National strategies are needed to continue to promote the broader benefits of participating in sport and organised physical activity to reduce physical inactivity and related disease burden. This paper employs the RE-AIM framework to evaluate the impact of the federally funded $150 million Move it AUS program in engaging inactive people in sport and physical activity through the Participation (all ages) and Better Ageing (over 65 years) funding streams. A pragmatic, mixed-methods evaluation was conducted to understand the impact of the grant on both the participants, and the funded organisations. This included participant surveys, case studies, and qualitative interviews with funded program leaders. A total of 75% of participants in the Participation stream, and 65% in the Better Ageing stream, were classified as inactive. The largest changes in overall physical activity behaviour were seen among socioeconomically disadvantaged participants and culturally and linguistically diverse participants. Seven key insights were gained from the qualitative interviews: Clarity of who, Partnerships, Communication, Program delivery, Environmental impacts, Governance, and that Physical inactivity must be a priority. The Move It AUS program successfully engaged physically inactive participants. Additional work is needed to better engage inactive people that identify as culturally and linguistically diverse, Aboriginal and/or Torres Strait Islander and those that live in disadvantaged communities in sport and physical activities. Tangible actions from the seven key insights should be adopted into workforce capability planning for the sport sector to effectively engage physically inactive communities.