Effective Propulsion in the TI Method means to direct ‘available’ forces, rather than generating muscular forces. Gravity and body mass are a ‘free’ source of power, which can minimize reliance on muscular force. You then convert Force (horsepower) into Locomotion by concentrating on holding water, rather than moving water back.
if you address Balance first, then Streamlining, then Propulsion, you minimize the potential for frustration or confusion and maximize the potential for clarity and success.
Though the brain makes up just 2 percent of the body’s weight, it consumes 20 percent of
its energy. While moving on land some 50 percent of the brain’s energy consumption goes
to managing balance. But when the brain senses imbalance (and particularly when it thinks
you’re sinking) over 90 percent of its energy is consumed with trying to fix that.
Never turn on a muscle unnecessarily. Never move a muscle without a clear benefit. Identifying unnecessary or counterproductive muscle tension should be one of your prime strategies for improving your endurance.
rotation is intiated by gravity and an intentional weight shift. "fall" into the water led by the swing arm. The kick is intiated with this same moment
Reducing SPL at the same Tempo is one of the most exacting of all skills. I do it from time to time but it's not easy, even for me. I don't do it by pulling harder. Rather I do it by increasing the whole-body power I apply to each stroke. And I do that with exceeding care.
-Terry
When your extended arm is slightly outside your shoulder line your shoulder range of motion is considerably greater than when it's near the centerline.