Indoor triathlon Indoor triathlon An indoor triathlon is a nonstandard variation of the triathlon and consists of three events: swimming, cycling, and running. The swim is held in an indoor pool, the cycling takes place on stationary bikes, and the run takes place on an indoor track or treadmill. Indoor triathlons are generally held in fitness clubs to accommodate all three sports. In some competitions participants are judged by the distance they travel in each event in a set amount of time. Times can vary between races. On other occasions, the triathlon is conducted in the same manner as an outdoor triathlon
Indoor air quality ventilation. Instead of setting throughput at a fixed air replacement rate, carbon dioxide sensors are used to control the rate dynamically, based on the emissions of actual building occupants. For the past several years, there have been many debates among indoor air quality specialists about the proper definition of indoor air quality and specifically what constitutes "acceptable" indoor air quality. One way of quantitatively ensuring the health of indoor air is by the frequency of effective turnover of interior air by replacement with outside air. In the UK, for example, classrooms are required to have 2.5 outdoor air changes per