Some exercisers find interval training less monotonous than continuous-intensity exercise. In trained long term aerobic exercisers, basal levels are unchanged, or decreased. Anaerobic exercisers have testosterone levels below sedentary controls in cross sectional analysis. Participants ranged from ultra-endurance athletes and triathlonists to regular exercisers. Most ankle sprains occur in more active people, such as athletes and regular exercisers. All the while, the exercisers continue their work-out routine. Both companies grew and benefited from the daily truckloads of exercisers rolling out.