"It's nice to run a lap in the morning, and my body feels much lighter. After Yin Yuting finished running, she walked slowly in the park.

"When people wake up in the morning, most of their brains are foggy, and running in the morning can speed up metabolism and adjust body functions to the best state. Wu Lang looked at her and said with a smile.

"Big brother, it's this kid who dislocated my arm. A voice shouted.

Wu Lang looked up and saw that it was a young man with colorful hair dyed that day, followed by six or seven tall and powerful men with strong physiques, which was the result of long-term fitness.

"Boy, you broke my brother's arm last time, and you won't be able to get out of this park gate without getting a million dollars in medical expenses today. The leading man walked slowly in front of Wu Lang.

"I said skewers, you're not done yet, there are a few big horses guarding you today, and I'm showing off my power here? The scene that day, the park surveillance has all recorded, why don't we take a look!" Wu Lang squinted at the young man with dyed hair, and didn't pay attention to the big man in front of him at all.

"Little cub, I've been looking for you for a few days, and today I finally caught you, watch my eldest brother you!" The young man with dyed hair looked at Wu Lang arrogantly and said arrogantly.

"Boy, don't talk nonsense, I'm in charge today, take the money!" After the leading man finished speaking, he stretched out his right hand and grabbed Wu Lang's neck.

Wu Lang also stretched out his left hand, and the latter came first, grabbed the big man's right hand, and made a slight effort......

"Ah...... My hand, let go quickly, it's going to be broken!" Dahan's face changed in an instant, his facial features were distorted, and he looked at Wu Lang in horror.

"Don't come here, it's a society under the rule of law now, and you have to squat and eat nests when you fight, and there is surveillance all around this park, you have to think about it!" Wu Lang's eyes widened, and his right hand pointed at a few big men who were about to rush over.

"Don't come here, you let go of my hand first. The leader grinned, and beads of sweat were already on his forehead.

Wu Lang looked at him coldly and withdrew his hand.

The leading man looked down and saw that there were already bruised purple marks on the back of his left hand, and then looked at Wu Lang in shock.

"I can't see that you are still a practitioner, I admit it this time, let's see!" The leading man gritted his teeth and nodded at Wu Lang, turned around and took the young man with dyed hair and a few big men, and walked away.

"Let's go back to breakfast, and then I'll accompany you to the gym. Wu Lang looked at Yin Yuting with a smile.

Yin Yuting looked at the scene in front of her from beginning to end, didn't say a word, then nodded, and followed Wu Lang home with a smile.

"Sister Ting, why didn't you tell my brother earlier, what the hell, dare someone to tease you, this is worth it, let the fat man catch the rabbit cub, you have to break him to pieces!" After listening to Yin Yuting's story, Yin Fat got up from his chair and yelled.

"Fatty, it's all trivial things, and you need your old man to go out in person, and the younger brother can do it alone, eat first." Wu Lang persuaded and pulled him to sit down.

"Brother, it's not a big deal, just your temper, after you know, don't cripple people, okay, I know you care about me, I will tell you next time, hurry up and eat, I will go to the gym after eating with Brother Lang!" Yin Yuting also persuaded Yin Fat on the side.

"I'm fine today, let's go together, Sister Ting, you won't dislike your brother's "Philips", right? Yin Fat looked at her with a smile.

"You're my brother, and my sister won't dislike you! Besides, there's already a "Philips" next to me, so it doesn't matter if you have more. Yin Yuting finished with a smile and glanced at Wu Lang.

"Sister Ting is right, Xiao Langlang's big bald head is comparable to a 500-watt tungsten lamp, which is also glorious!"

"Fatty, when are you drunk, I have to shave you a big bald scoop, so that you can also be dazzling!" Wu Lang looked at him with black lines on his face.

"No problem, the fat man welcomes Xiao Langlang to shave his head at any time, who let us two be good brothers, hahaha......" Yin Fat Man listened to Wu Lang's words, looked at his embarrassment, and laughed even more.

Hahaha......

Yin Yuting looked at Wu Lang's stunned appearance, and she couldn't stop laughing......

The three of them finished a pleasant breakfast with a smile, and then went out to drive the black warrior off-road vehicle towards the largest fitness club in Haizhou, "Donglan Fitness Club".

"Xiao Langlang, you and Sister Ting go in for activities, I'll sit on the sofa and drink tea, and I'll go in to find you later. When the fat man entered the gym, he sat on the sofa in the hall, too lazy to move.

Wu Lang and Yin Yuting looked at the appearance of the fat man, and at the same time shook their heads and sighed: "If you are not fat, it is difficult to survive!"

After finishing speaking, the two walked into the fitness area, and Wu Lang watched Yin Yuting doing equipment exercises.

"You can practice too. Yin Yuting looked at Wu Lang.

"I'm not interested in this, you practice, I'll accompany you. Wu Lang shook his head and smiled.

It doesn't take much time, there are a lot of men and women who exercise in fitness, most of them are young people in their twenties and thirties, and there are many people in their forties, and now people pay more attention to physical exercise, some people are jogging on the treadmill listening to music, some people are doing various equipment exercises, and the fitness area is suddenly lively, Wu Lang looked at all this curiously.

"Haven't you been to the gym before?" Yin Yuting wiped her sweat with a towel, looked at Wu Lang's appearance, and smiled.

Wu Lang shook his head and smiled, but did not speak.

"Then why are you in such good shape?" Yin Yuting looked at him in surprise.

"I usually do push-ups, sit-ups, skipping rope or something when I have nothing to do, the key is that we have good genetics, alas...... There's no way, sometimes, it's a headache to think about!" Wu Lang frowned slightly, shook his head again and again, and looked complaining.

"Look at your squeezing energy, you look like you don't have to pick up. Yin Yuting smiled coquettishly and punched him lightly in the chest.

Hahaha...... Wu Lang immediately burst out laughing.

"Seriously, why don't you do these workouts. Yin Yuting looked at Wu Lang.

"You are also studying medicine, and you should know that these can only exercise the voluntary muscles, and they look good, but in fact, they are of no practical use. Wu Lang said with a smile.

"Then you tell me what voluntary muscles are, I didn't do my homework well in this area, and I just happened to study for a while. Yin Yuting looked at Wu Lang with a smile.

"Voluntary muscles are muscles that are consciously controlled by themselves, such as your upper arm muscles, leg muscles, etc. An example of voluntary muscle movement is a person walking or picking up an object. The movement of involuntary muscles, such as the smooth muscles of the small intestine and the ring muscles of the stomach, is usually not controlled by the individual's consciousness. An example of involuntary muscle movement is the movement of the heart muscle pumping blood outward. ”

"Voluntary muscles, also known as skeletal muscles, are muscles that are attached to bones. Starting from the head, neck, limbs, and torso have skeletal muscles, it is mainly concentrated in the limbs, and you do telescopic exercises with your will, but it has a problem, that is, it is particularly easy to get tired, and you will be very sore after excessive exercise like a machine, and some people can't even get out of bed in the morning. ”

"What is the reason for that?" Yin Yuting looked at Wu Lang and said curiously.

"That's because after a certain period of strenuous exercise, due to the excessive consumption of nutrients in the body, the supply of oxygen is insufficient, and the energy is replenished through anaerobic digestion. People who usually lack exercise are more likely to have muscle soreness because they have less ATP stores in their tissues and have a worse aerobic energy supply capacity. The large amount of lactic acid formed in the muscles cannot be transported quickly to the liver and is converted into liver glycogen, and it builds up in the body, causing the muscles to feel sore. ”

"Muscle contraction requires energy, and if the energy comes from the metabolism of aerobic sugar in the cells, it is aerobic exercise; If the energy comes from anaerobic glycolysis, it is anaerobic exercise. During aerobic exercise, glucose is metabolized to produce water and carbon dioxide, which can be easily excreted from the body through breathing, and are harmless to the human body. During anaerobic exercise, glucose digestion produces a large amount of intermediate metabolites such as lactic acid, which cannot be eliminated by breathing, and most of them are transported from the blood to the liver and converted into liver glycogen. When too much lactic acid is produced, there is no time to convert, and a build-up of lactic acid is formed, causing muscle soreness. ”

Some people passing by in the fitness area stopped to stand beside him when they heard Wu Lang's words, and listened, and slowly the crowd gathered more and more, and there were forty or fifty people, surrounding him and Yin Yuting......