SPIRIT FITNESS PROGRAMS: HILL: This program follows a triangle or pyramid type of gradual progression from Approx. 10% of maximum effort (the level that you chose before starting this program) up to a maximum effort which lasts for 10% of the total workout time, then a gradual regression of resistance back to Approx. 10% of maximum effort. FAT BURN: This program follows a quick progression up to the maximum resistance level (default or user input level) that is sustained for 2/3 of the workout. This program will challenge your ability to sustain your energy output for an extended period of time. CARDIO: This program presents a quick progression up to near maximum resistance level (default or user input level). It has slight fluctuations up & down to allow your heart rate to elevate, & then recover repeatedly, before beginning a quick cool down. This will build up your heart muscle & increase blood flow & lung capacity. STRENGTH: This program has a gradual progression of resistance up to 100% of maximum effort that is sustained for 25% of workout duration. This will help build strength & muscular endurance in the lower body & glutes. A brief cool down follows. INTERVAL: This program takes you through high levels of intensity followed by recovery periods of low intensity. This program utilizes & develops your " Fast Twitch" muscle fibres which are used when performing tasks that are intense & short in duration. These deplete your oxygen level & spike your heart rate, followed by periods of recovery & heart rate drop to replenish oxygen. Your cardiovascular system gets programmed to use oxygen more efficiently. MANUAL: The Manual program works as the name implies, manually. This means that you control the workload & not the computer. USER (2): Two people can store personal information & design a custom program that can be saved for future use. You decide what the resistance will be for each segment of the program. HEART RATE: Designed to help