大夥用二手/三手/四手的資訊，甚至是印象和傳聞也可以討論這麼多，
要做有意義的討論，一開始就把題目/材料確定再來討論不是比較合理嗎？
以下引用自Terry Laughlin的“Freestyle Mastery Complete Self-Coaching Course”
Group 3 Stroke Pressure Mastery
These three exercises teach you to convert pressure into speed, not turbulence. Apply pressure
to the water with care and precision.
1. How Fast are you Moving?
A very simple exercise: Compare the speed of your arm moving back to that of your body moving forward. Your body’s forward speed should match your arm’s rearward speed.
2. Vary Pressure
Practice applying different pressure levels. I strive for four levels of pressure:
‧ Featherlight (one of our coaches calls this ‘gathering moonbeams’). I explore the least pressure I can apply. I begin every practice with five to 10 minutes of this.
‧ Light: Just slightly more. I start my distance races with this pressure level. In a 1500m race,
I’ll maintain this pressure level for the first 300m.
‧ Medium: At this level, I start to notice moderate muscle-loading in arm, shoulder and upper
torso. In a 1500m race I maintain this pressure level from about 300 to 1200m.
‧ Firm: This is the firmest pressure at which I feel I can keep the Ball of Water Molecules
quiet. I work tirelessly in practice to avoid dispersing water molecules. In a race I’ll apply
Firm pressure in the final 100 to 300m. I NEVER PRESS HARD!
Add each new pressure level only when you feel a current level convert effectively into locomotion. Use the following as indicators:
1. The water feels slightly ‘thick’ to your hand--like syrup--as you press. No bubbles!
2. Your body moves forward as fast as your hand presses back. If you feel your hand moving
faster, lighten pressure until they match.
3. You feel the same level of resistive-pressure on the leading edge of your body (forehead
and shoulders) as you feel on your hand and forearm pressing back. As you press back
more firmly, you feel equal water resistance on face and shoulders.
4. Your ultimate goal is to feel the same amount of hydrostatic pressure on all surfaces of
your body as you feel on hand and forearm.
Indicators 3 and 4 require an exceptional degree of self-perception and sensory awareness. The more you pay attention, the more you’ll notice.
以上是TI的手部精華，請高手們就此討論，讓入門者可以知道什麼是有效/無效的嘗試。
另外，59.99鎂就可以買到書加影片完整一步步清楚易懂的教學和自我檢驗清單，如果只是想學TI自由式，這比第三者轉達的“指示/心得”要有效益的多。
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