When contemplating the question of what speed one should run on a treadmill, several compelling factors come into play that merit careful consideration. Should an individual prioritize endurance training, speed work, or perhaps a balanced mix of both? How do personal fitness goals, such as weight loss, cardiovascular improvement, or preparing for a race, influence the optimal pace? Moreover, is one’s current level of fitness a determining factor in selecting a suitable speed? For a novice, a gentle, moderate pace might seem prudent, while a seasoned runner may benefit from a more vigorous tempo. Additionally, could external variables such as incline settings or the treadmill’s design impact the chosen speed? In seeking the ideal treadmill pace, how does age, body composition, or even psychological readiness come into play? Ultimately, what are the best practices and methodologies for gauging and adjusting one’s running speed effectively on the treadmill?