Golf swing is a multi-plane and multi-directional movement, which requires most joints of the body to complete the movement close to its limit. If the range of motion of joints or muscles is limited, it will have many negative effects, including the decline of swing quality, the increase of injury risk and the decrease of sports fun. On the contrary, extensive exercise not only helps to avoid injury, but also lays the foundation for improving the stability and accuracy of hitting the ball and increasing the hitting strength. As stated in chapter 1, the consistency and efficiency of golf swing depend on many unique physical abilities and mastery of various techniques, including physical flexibility, stability, strength, explosiveness, endurance, balance and body consciousness.

Many people think that golfers can hit the ball further by increasing their strength. This idea stems from a misunderstanding of human dynamics, physics and the skills used by elite athletes. If the most important factor in playing long ball is the weight lifting ability of the players on their backs or squats, then every American football runner can hit the ball for one mile (1 mile is about 1.6 km) by picking up the golf club. As we all know, this is not the case. Many players who participate in PGA Tour are not overly muscular, and their bodies are not like ordinary fitness athletes.

? Sean O'Hare and dustin johnson are typical representatives of thin people, and the hitting distance often exceeds 300 yards (1 yard is about 0.914m). On the other hand, john darley has been devoted to excellent long-distance races. He may never go to the gym, and even if he does, he won't go many times. In the whole swing process, the ability of the body to achieve a specific angle and movement has a greater influence on the high-speed movement of the club head than the weight lifting ability of the player. In golf, mobility not only plays an important role in increasing the hitting distance, but also plays an important role in improving the accuracy and stability of hitting and avoiding injuries.

? Besides playing all the time, Sean O 'Hare, dustin johnson, john darley and tiger woods all have one thing in common, that is, they all have excellent mobility. If the golfer's mobility is above average, he can make an excellent swing even if he lacks some other important skills introduced in this book. Having said that, if two golfers can reach the same angle in the process of swinging, the player with stronger physical strength (the strength here is different from the traditional fitness strength) is likely to have an advantage in hitting distance. This chapter and the whole book are all about helping you to complete the various angles needed for high-quality golf swing and gain the above-mentioned functional strength, so as to play efficiently and effectively.