Cycling and Swimming - Two Effective Exercises for Burning Fat and Shaping a Healthy Physique

Cycling has become increasingly popular for fitness and weight loss both domestically and internationally in recent years. my country is known as the "Kingdom of Bicycles," and bicycles are an economical, affordable, pollution-free, and highly efficient mode of transportation for its citizens, especially urban residents.

Modern sports medicine research has proven that cycling can prevent brain aging and improve the agility of the nervous system. Cycling is a contralateral exercise; according to the principle of contralateral control, the left side of the body is controlled by the right hemisphere of the brain, and the right side by the left. The alternating pedaling motion of cycling helps develop the function of both hemispheres of the brain, preventing their imbalance and premature aging. Cycling can improve and enhance the function of the cardiovascular, respiratory, digestive, muscular, and skeletal systems. Measurements show that when cycling fast uphill against the wind, heart rate can increase from a resting 70 beats per minute to 160 beats per minute; lung ventilation (the amount of air passing through the alveoli in one minute) can increase from a resting 3-4 liters per minute to 24-46 liters per minute, an increase of 11.5-14 times, and advanced cyclists can see an increase of up to 24 times. Cycling engages three pairs of joints in the lower limbs (hip, knee, and ankle) and 26 pairs of muscles, with the lower limb joints and thigh muscles benefiting the most. The muscles, ligaments, and related bones of the neck, shoulders, arms, waist, abdomen, groin, and buttocks also receive corresponding exercise.

Due to the multi-functional benefits of cycling, the number of people using it for fitness and weight loss is increasing daily. Taking the United States as an example, according to *U.S. News & World Report*, 20 million Americans use cycling for fitness and weight loss, and this number continues to rise. For instance, the number increased by 30% in 1987 compared to 1986, and by another 38% in 1988 compared to 1987. According to surveys by relevant international committees, postal workers have the longest lifespan among all professions worldwide. One reason is that while delivering mail by bicycle, they exercise, improve their cardiovascular function, and enhance their health and physical fitness. Many famous figures, both Chinese and foreign, have used cycling for fitness, such as the renowned chemist Marie Curie, the French writer Émile Zola, and the Italian composer Giuseppe Verdi. Professor Xia Xiang of Tsinghua University, the 88-year-old former vice chairman of the Beijing Municipal Committee of the Chinese People's Political Consultative Conference, recipient of the IAAF "Veteran of Athletics Merit Award," once remarked with deep feeling: "For over 80 years, I have used cycling as a means of fitness, and I have benefited immensely from it."

In recent years, countries such as the United States, Belgium, France, Sweden, and Germany have launched trendy cycling "day trips" as a form of sports tourism, attracting tens of thousands of cycling enthusiasts. Some Eastern European countries have even established cycling centers or information stations to serve as advisors for those who use cycling for fitness and weight loss.

Cycling is effective for fitness and weight loss because it is an aerobic, cyclical exercise that burns a lot of calories, resulting in significant weight loss. Studies abroad have shown that the average weight of six long-distance cyclists before training for 180 kilometers was 68.8 kg, and their average weight at the finish line was 63.3 kg, a decrease of 5.5 kg, equivalent to one-twelfth of their body weight. Studies abroad have also measured the calorie expenditure of cycling, finding that at an average speed of 6 mph, 270 kcal is burned; at 8 mph, 330 kcal; at 10 mph, 400 kcal; at 12 mph, 550 kcal; and at 13 mph, 850 kcal (Note: 1 mile = 1.609 km). Modern sports medicine research confirms that an obese person who consistently cycles 5 km at a moderate pace daily can lose 9 kg of body fat in a year. This proves that consistent cycling is a significant weight-loss exercise.

Swimming: Swimming combines water bathing, air bathing, and sunbathing. While swimming, the body is prone, supine, or side-lying in the water; the resistance, pressure, and buoyancy of the water provide a good massage effect on the body. Swimming not only improves thermoregulation and enhances the function of the cardiovascular and digestive systems, but also strengthens the body, cultivates willpower, and is particularly effective in improving coordination, developing muscles, shaping a healthy physique, and correcting body posture. Learning to swim also has special significance for national defense and industrial development. Due to its unique value, and the fact that the force is evenly distributed across the body during practice, minimizing the risk of injury to muscles, ligaments, and joints, swimming is suitable for people of all ages and genders, and is especially popular among teenagers. The graceful movements of swimming can even help children grow taller with consistent practice.

When swimming, the body is directly immersed in water. Water not only provides significant resistance but also has excellent thermal conductivity, accelerating heat dissipation and thus consuming a large amount of energy. Experiments have shown that swimming 100 meters in water burns 2-3 times more calories than walking 100 meters on land. Staying in 14°C water for one minute burns up to 100 kilocalories, equivalent to the heat dissipated in one hour in air at the same temperature. Therefore, swimming is one of the most effective exercises for fitness and weight loss.

However, patients with heart disease, tuberculosis, hepatitis, or kidney disease should follow their doctor's advice before swimming. Swimming should not be done immediately after strenuous exercise to prevent cramps or other illnesses.

Safety is paramount when swimming, especially for children and beginners, to prevent accidents.

Cramps are common during swimming. They often occur in the calf muscles (gastrocnemius, fingers, toes), sometimes the thigh, and even the gastrointestinal tract.

Cramps are involuntary, forceful muscle contractions, also known as muscle spasms. Specific symptoms include: hardened, painful muscles; weakness; general weakness; and a sudden loss of motor ability. Once relieved, exercise can resume immediately.

Treatment for muscle cramps while swimming:

(I) Stretching Method: The stretching method involves quickly helping the cramped muscle straighten.

1. Finger cramps: Clench your fist tightly, then forcefully open your palm and fingers. Repeat until the cramp subsides.

2. Upper arm cramps: Bend your arm, keeping your elbow close to your waist, clench your fist tightly, palm facing your collarbone. Then quickly and forcefully open your palm and straighten your arm. Repeat until the cramp subsides.

3. Calf or toe cramps: Take a deep breath, lie supine on the water, use your opposite hand to pull the toes of the cramping leg, and use your same-side hand to press down on the knee of the cramping leg. Straighten the leg and flex the toes, quickly straightening the cramping leg. The cramped muscle will then be relieved or eliminated.

4. Thigh or gastrointestinal cramps: Take a deep breath, lie supine on the water, bend... Kneel, hug your calf with both hands, bringing your thigh close to your groin, then slowly straighten your calf. Repeat until the cramp subsides.

If you experience a cramp while swimming, remain calm and do not panic. If you are able, try to relieve it yourself as quickly as possible. If you are not able, ask for help. If you are far from the shore, immediately swim to shore using a backstroke or call for help to avoid an accident.