Introduction: Tissues located on the plantar side of the foot determine its static and dynamic properties and their tightness might be associated with limiting the range of motion in functional tasks. The aim of the study was to determine the effect of loosening tissues located on the plantar side of the foot on its longitudinal arching and on the range of the trunk forward bend. Material and methods: The study was conducted on 30 healthy volunteers, aged 18-25. They were divided into two groups and assigned to an experimental group (EG, n = 15) and a control group (CG, n = 15). Participants in both groups underwent three series of measurements including the measurement of the height of the navicular bone, the fingers-to-floor test and the podoscopic examination (Clarke's angle). In between these measurements subjects from the EG performed a foam-rolling sequence. The subjects from the CG did not perform any intervention. Acute and chronic effect (2 weeks) of foam rolling was examined. Results: Changes in the Thomayer's test results, Clarke's angle values and the height of navicular bone values caused by the intervention did not show a statistically significant difference between the EG and CG (p>0.05). Conclusions: Foam rolling of the plantar side of the foot does not seem to influence the shape of the foot and the trunk forward bend range of motion. Further research is required to investigate the effects of foam rolling.

Introduction: Despite of sustainable living and increasing the knowledge of the future mothers, the number of preterm births have been at the same level through last years. In Poland it is stands at around 7%, comparable with other countries from European Union. The aim was to investigate the influence of prematurity on input power and regulation power during stress test in adult women. Achieved power depends on the level of physical efficiency and it is converted for specific VO2max values. Material and methods: 11 women born prematurely at age of 25-30 years (28,2± 2,3) did stress test according to W150 protocol. The control group consisted of 15 women born on time (27-32, 28,5±2,4). The statistical analysis included t-Student and Shapiro-Wilk tests. Index height/regulation power and BMI/ regulation power have been subjected to correlations. Results: There is statistical significant difference between input and regulation power in women born prematurely and the control group. Women from control group had significantly higher input and regulation power than women born premature. Moreover, there is proportionality between input and regulation power in two groups. Conclusions: 1. Prematurity influences the amount of power generated in women aged 25-30 negatively - women born prematurely are evidently less physically efficient than women born on time. 2. There is a connection between input and regulation power in both groups. Higher amounts of input power indicates higher amounts of regulation power. 3. There is no relationship between BMI and amounts of power in stress test.