Objective: This study aims to determine the relationship between weekly pre-competition running volume and the presence of running-related injuries (RRIs) by race distance. Methods: An online questionnaire was sent to 25,000 participants, 14 days following the running event. The questionnaire included the presence and topography of RRIs, previous injury in the last 12 months, running experience, training, and sociodemographic characteristics. Univariate and multivariable binomial regression was used to analyse the crude and adjusted relationship of RRI and training volumes. Results: 4380 surveys were analysed (10km, n=1316; 21km, n= 2168; 42km, n=896). The median age was 36 years. Previous injury was reported by 51.8% of the respondents. Median training volume in the previous month was 15 km/week (IQR 6-24), 30 km/week (IQR 15-40) and 45 km/week (IQR 30-60), for the 10km, 21km, and 42km distances, respectively. During the race, 14.1% reported a RRI, with 43.1% located at the knee. The multivariable analysis showed previous injury and distance as the main associated factors, whereas weekly training volume, age, and previous participation were protective. Conclusion: Race is an inciting event for developing a RRI. Running race distance is an important factor itself and should be incorporated with other modifiable risk factors in current injury models.

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Background: Health-related quality of life (HRQoL) is defined as the patient's perception of their health status. HRQoL can be modified by illnesses, treatments or social and health policies. Chronic musculoskeletal pain is a modifying factor of HRQoL that leads to lower quality of life, elevated suffering and disability. Knowing HRQoL in subjects reporting chronic musculoskeletal symptoms (cMSS), like pain, discomfort or swollenness lasting more than 3 months, will provide information to health teams and organizations engaged in the Chilean health system. This study aim was to determine the relationship between HRQoL and musculoskeletal symptoms measured in three different Chilean groups: [1] without symptoms; [2] with acute symptoms; and [3] with cMSS. Methods: A secondary analysis of the 2009-10 Chilean National Health Survey (NHS) was executed to determine the relationship between HRQoL (measured with SF-12) in three MSS groups. The Chilean NHS considered a national, probabilistic, stratified and multistage sample of 5293 participants aged 15 and older; it was representative at the national, urban-rural and regional levels. A multivariate logistic regression model studied the relationship between cMSS and HRQoL, adjusted for age, sex, educational level and residence area as control variables (p < 0.05). Results: Out of 5293 participants in the NHS 2009-10, 5276 subjects were included for analysis. The median age was 46 years (IQR 31-60), 59.4% women, a median of 10 years formal education (IQR 7-12) and an urban residence in 85.2% of the population of the NHS 2009-10. The observed population prevalence of people with cMSS was 42.6% ). Presence of cMSS is a risk factor for low HRQoL, exhibited both in the physical (OR 3.1 95% CI 2.7-3.5) and mental (OR 1.9 95% CI 1.6-2,) HRQoL dimensions, independent of control variables. Conclusions: Physical and mental HRQoL are affected in people with cMSS, low educational level and advanced age. This is especially seen in women. This information will facilitate assessment and treatment of cMSS as a prevalent and multidimensional health problem.

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Background: Health-related quality of life (HRQoL) is defined as the patient's perception of their health status. HRQoL can be modified by illnesses, treatments or social and health policies. Chronic musculoskeletal pain is a modifying factor of HRQoL that leads to lower quality of life, elevated suffering and disability. Knowing HRQoL in subjects reporting chronic musculoskeletal symptoms (cMSS), like pain, discomfort or swollenness lasting more than 3 months, will provide information to health teams and organizations engaged in the Chilean health system. This study aim was to determine the relationship between HRQoL and musculoskeletal symptoms measured in three different Chilean groups: (1) without symptoms; (2) with acute symptoms; and (3) with cMSS. Methods: A secondary analysis of the 2009-10 Chilean National Health Survey (NHS) was executed to determine the relationship between HRQoL (measured with SF-12) in three MSS groups. The Chilean NHS considered a national, probabilistic, stratified and multistage sample of 5,293 participants aged 15 and older; it was representative at the national, urban-rural and regional levels. A multivariate logistic regression model studied the relationship between cMSS and HRQoL, adjusted for age, sex, educational level and residence area as control variables (p<0.05). Results: Out of 5,293 participants in the NHS 2009-10, 5,276 subjects were included for analysis. The median age was 46 years (IQR 31-60), 59.4% women, a median of 10 years formal education (IQR 7-12) and an urban residence in 85.2% of the population of the NHS 2009-10. The observed population prevalence of people with cMSS was 42.6% (95% CI 40.4 - 44.9). Presence of cMSS is a risk factor for low HRQoL, exhibited both in the physical (OR 3.1 95% CI 2.7-3.5) and mental (OR 1.9 95% CI 1.6-2,) HRQoL dimensions, independent of control variables. Conclusions: Physical and mental HRQoL are affected in people with cMSS, low educational level and advanced age. This is especially seen in women. This information will facilitate assessment and treatment of cMSS as a prevalent and multidimensional health problem.

Background: Health-related quality of life (HRQoL) is defined as the patient's perception of their health status. The HRQoL can be modified by illnesses, treatments or social and health policies. Chronic pain is a modifying factor of HRQoL that leads to lower quality of life, elevated suffering and disability. Understanding potential quality of life variations in subjects with chronic musculoskeletal symptoms (cMSS) will provide information to health teams and organizations engaged in the Chilean health system. This study aim was to determine the relationship between HRQoL and musculoskeletal symptoms measured in three difference Chilean groups: (1) without symptoms; (2) with acute symptoms; and (3) with cMSS. Results were interpreted according to age, sex, educational level and residence area. Methods: This was accomplished using a secondary analysis of SF-12 data from the 2009-10 Chilean National Health Survey (NHS) using a multivariate logistic regression model to study the relationship between cMSS and HRQoL scores, adjusted for control variables. A 5% level of significance was considered. The STATA 15 was used for statistical analyses. Results: Out of 5,293 participants in the NHS 2009-10, 5,276 subjects were included for analysis. The median age was 46 years (IQR 31-60), 59.4% women, a median of 10 years formal education (IQR 7-12) and an urban residence in 85.2% of the population of the NHS 2009-10. The observed population prevalence of people with cMSS was 42.6% (95% CI 40.4 - 44.9). Presence of cMSS is a risk factor for low HRQoL, exhibited both in the physical (OR 3.1 95% CI 2.7-3.5) and mental (OR 1.9 95% CI 1.6-2,) HRQoL dimensions, independent of control variables. Conclusions: Physical and mental HRQoL are affected in people with cMSS, low educational level and advanced age. This is especially seen in women. This information will facilitate assessment and treatment of cMSS as a prevalent and multidimensional health problem.