About the Commercial 2450 Treadmill:The NordicTrack Commercial 2450 Treadmill is the dedicated runner s go-to treadmill. This smart treadmill can reach speeds of up to 14 Mph (4:17 minutes-per-mile pace), fast enough that, if you re up for the challenge, you could run a sub-2-hour marathon. This high-speed capability makes it ideal for interval training. The adjustable 12% incline to -3% decline allows you to train with precision, mimicking the exact gradients you ll face in your race. This specificity not only builds powerful leg strength and endurance by targeting different muscle groups but also enhances cardiovascular fitness and increases calorie burn through more efficient heart rate elevation. The 24” Hd touchscreen pivots and tilts for optimal viewing, whether you re running or following off-treadmill workouts. The RunFlex cushioning is engineered specifically for runners.