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Treadmill: High Incline Holding On vs. Low with Hands Off ... The answer is basic: Holding onto a treadmill during an incline is never better than letting go. Now, if you want to get argumentative about this, you can always compare holding onto the highest incline at 4 mph to not holding onto a 2 percent grade at 1 mph. In this unfair comparison, the holding-on version will burn more calories. Treadmill Stress Test Speed And Incline - Gym With ... · The “Bruce” technique, named after Dr. Robert Bruce, who invented it in the 1950s, is the most widely…