The aim of the study was to analyse and find out potential dependence between the dynamic rifle stability during targeting and percentage pressure value on the trigger 1 second and 0.5 second before the shot in different intensities of the physical load. Fifteen national youth and junior elite biathletes (ten women, five men) from a team of the Czech Republic participated in the study. All participants completed measuring of the dynamic behavior of the rifle in rest and after roller skiing in three different exercise intensities: Intensity 1 = 70 % of HRmax (maximum heart rate), average speed 4.1-4.6 m•s-1 ; Intensity 2 = 80 % of HRmax, average speed 4.5-5.0 m•s-1 ; Intensity 3 = 90 % of HRmax, average speed 4.9-5.4 m•s-1. Each bout consisted from a distance of one km. They shot in standing position with using their own biathlons rifle with a fixed accelerometer and trigger sensor. The data used in our research showed that the dynamic rifle stability is not influenced by exercise intensity neither in the men nor women group. However, our study demonstrated that the rifle stability is better in time 0.5 second before the shot than in time 1 second before the shot. The measurement of triggering in our study showed that participants are able to work with their fingers on the triggers in similar quality in the racing load as well as without the previous physical load.

The main aim of this article is to provide some insight into evidence-based data in running. The prevalence of a rearfoot strike (RFS) pattern is much more usual than a forefoot strike (FFS) even among elite distance runners. There has been significant pressure on runners to change their running style from RFS to FFS in recent times. Usually, this has been justified by the statement that FFS relates to a lower injury rate. Recent studies have shown however, that this statement is probably not true. Different types of strike pattern have an influence on loading different structures of the lower limbs, but the total incidence of running related injury is the same regardless of the type of foot strike pattern. We want to provide not only an objective view on running technique but also an evidence-based view on the choice of running shoes. There are many recommendations to consider when choosing running shoes, especially in running stores, but only a few of them are supported by research. This article is not a meta-analysis but it provides some evidence based information about running styles and running shoes.