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Impact on physical fitness of exercise promotion service utilizing social media

100%
Santtila M., Grönqvist K., Räisänen J., Kyröläinen H.
Biomedical Human Kinetics
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2014
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vol. 6
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issue 1
EN
Study aim: the purpose of the present study was to survey the impact of a social media platform on physical fitness, physical activity levels and daily sitting time. Material and methods: a total of 2039 users (1445 women and 594 men) of the social media service (HeiaHeia, Helsinki, Finland) voluntarily participated in the study by answering an online questionnaire provided by a survey. Results: about 63.8% of the participants reported that the service has advanced their perceived level of physical fitness, while 36.2% reported no impact on their fitness. Most participants (71.3%) with BMI over 25 reported that the service had helped them to improve their physical fitness. Participants with BMI over 35 reported a more positive impact than in any other weight range groups. One-third of the participants (32.3%) sat for more than seven hours a day; 23.5% sat less than five hours a day. More than half of the participants (56.8%) were encouraged to be physical active during the day and aimed to reduce sitting time at their jobs during the workday. Conclusions: there seems to be a positive impact of web services that promote physical activity on the physical fitness among social media users. Although the present service is not merely well suited for physically active and physical fit users, it motivates users of all fitness levels to exercise. However, more studies are needed to clarify effects of social media on physical activity, fitness and health.
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Estimation of aerobic fitness among young men without exercise test

100%
Tanskanen M. M., Kyröläinen H., Santtila M., Tammelin T.
Biomedical Human Kinetics
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2015
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vol. 7
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issue 1
EN
Study aim: to develop and estimate the validity of non-exercise methods to predict VO2max among young male conscripts entering military service in order to divide them into the different physical training groups. Material and methods: fifty males (age 19.7 ± 0.3 years) reported their physical activity before military service by IPAQ and SIVAQ questionnaires. Furthermore, Jackson’s non-exercise method was used to estimate VO2max. Body mass and height were measured, body mass index calculated and VO2max measured directly in a maximal treadmill test. Subjects were randomly divided into two groups. The results of the Group 1 (N = 25) were used to develop a regression equation to estimate VO2max. The results of the Group 2 (N = 25) were used to evaluate the validity of the developed non-exercise methods and Jackson’s non-exercise methods to estimate VO2max by Bland and Altman plot. The validity was further evaluated by comparing the results to 12-minute running test performed by 877 male conscripts (age 19.6 ± 0.2 years). Results: the developed models explained 68–74% of the variation in VO2max. Mean difference between directly measured and estimated VO2max was not significant, while Jackson’s method overestimated VO2max (p < 0.001). Both developed models were equally valid to divide conscripts into tertile group of fitness. However, 5% of the conscripts were classified into the highest fitness group based on both methods, but they were actually in the lowest fitness group based on a running test. Conclusion: in practice, these findings suggest that developed methods can be used as a tool to divide conscripts into different fitness groups in the very beginning of their military service.
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Effects of an eccentric training programme on hamstring strain injuries in women football players

76%
del Ama Espinosa G., Pöyhönen T., Aramendi J. F., Samaniego J. C., Emparanza Knörr J. I., Kyröläinen H.
Biomedical Human Kinetics
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2015
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vol. 7
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issue 1
EN
Study aim: to test the hypothesis that an eccentric training programme applied on women football players would reduce the hamstring injury rate by improving thigh muscle balance and, particularly, hamstring strength. Material and methods: three football teams were recruited for this randomised controlled trial. They played in the first and second divisions in Spain. Players were randomised within clubs either to the intervention (eccentric exercises, n = 22) or control (control exercises, n = 21) groups, and randomisation was stratified according to previous history of thigh strains. The eccentric programme was divided into 3 phases, and each phase was composed of 7 weeks. Compliance level and all injuries were recorded throughout the season as well as training and game exposure times. Muscle strength and power of the lower extremities and flexibility of the hamstrings and lower back were measured before and after the intervention. Results: the risk for sustaining a hamstring strain (RSHS) was reduced by 81%. However, differences were not significant due to the low number of subjects (relative risk 0.19; 95% coefficient interval 0.02–1.50). The strength of the hamstrings decreased in both groups (p < 0.05), whereas sprint time was improved only in the intervention group (p < 0.05). Conclusion: the present findings suggest that a simple program of eccentric exercise could reduce RSHS.
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