An exercise apparatus with a single resistant rod configured to provide resistance for use in exercise and an electronic weight selector mechanism for use with a resistance rod having a variable resistance system and an electronic selector control. Exact and stable positioning of the flat material is achieved in that the safeguard to prevent sliding of the flat material is constructed as a surface disposed in the back area of the delivery table, exhibiting high friction vis–vis the flat material. An optical temperature sensing element, such as luminescent material or a surface of known emissivity, is carried within the cap. The capsule may also have an axial extension in the shape of a drinking-glass whose specific function is supplemented by a tamperproof seal function. A second working fluid in vaporous form is compressed, after which a third working fluid is formed by mixing the first flow of first working fluid vapor, the second flow of second working fluid vapor, and the second working fluid. Acceleration sensor automatically scrolls partial picture toward the direction opposite to sensed movement with prediction added.