Feasibility of VIIT in Adults With NASH

Subjects will be fitted with a heart rate monitor around the chest and a baseline 4ml blood sample will be drawn. Vigorous intensity interval training will correspond to heart rate (HR) range of 80-90% of heart rate at age-predicted heart rate maximum (220-age). After approximately 5 minutes of warmup subjects will perform 10 intervals of VIIT: 30 seconds of vigorous intensity exercise followed by 60 seconds of rest. Rated Perceived Exertion (RPE) will be rated by 15-point Borg scale; should correspond to HR/10 at end of each interval. The subject will self-adjust the intensity of the exercise bouts and will be encouraged by the researcher to achieve the desired intensity. The exercise session will finish with a short cool-down period and will last no more than 25 minutes in total. A 4ml blood sample will be drawn immediately following the exercise session and 2-hours after exercise cessation.