Cardio day getting a little too easy for you? A study published in the International Journal of Sports Medicine suggests elevating the treadmill conveyor isn't the only way to ramp up intensity. Researchers recruited 20 men in their early 20s and had them run on a flat treadmill at 10, 12, 14, 15 and 16 km per hour. That's a range of 6 to 10 miles an hour. Each 'set' lasted for 8 minutes and they got 10 minutes of rest before trying the next fastest speed. Later on, they repeated this routine on a stationary bike with speeds ranging between 65 and 70 RPM.
Although respiratory rate and blood lactate didn't change all that much between the treadmill and cycling workouts, exercising like this on the treadmill has a much greater effect on cardio-respiratory values than the same type of work on a stationary bike. Try this routine with both pieces of equipment and judge for yourself. Then check out the SIT workout posted on today's Breaking News at OptimumNutrition.com