大伙用二手/三手/四手的资讯，甚至是印象和传闻也可以讨论这么多，
要做有意义的讨论，一开始就把题目/材料确定再来讨论不是比较合理吗？
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