Individual swimmers may routinely and easily perform exercise regiments to maintain or enhance their general health and fitness utilizing the present invention. In the turning mode, road wheels and a driving wheel are set such that the wheels are oriented so as to follow along a circumference R1 to R3 that would be formed about a distal end of a fork arm. The invention finds industrial applicability in particular in medical and analysis fields. An engine simulation model is calibrated based on the plurality of combustion parameters and a plurality of engine maps are generated using the simulation model. % of an oxidation catalyst of Pt, Pd, Rh, Co, Mn and mixtures thereof for use in small pieces as embers in a gas-fired log set or fireplace.