No, it is not possible to build muscles without training. Muscle growth occurs as a result of resistance training, which involves challenging the muscles with weights or bodyweight exercises. Without this stimulus, the muscles will not grow in size or strength. Training is essential for stimulating muscle growth and promoting overall physical fitness. **

Muscles shake during training due to a combination of factors, including fatigue, muscle fiber recruitment, and the body's effort to maintain balance and stability. As muscles become fatigued, they may struggle to maintain a steady contraction, leading to trembling or shaking. Additionally, the body may recruit additional muscle fibers to help support the primary muscles being worked, leading to increased muscle activity and potential shaking. Finally, the body may also shake in an effort to maintain balance and stability, especially during exercises that require a high level of coordination and control. **

Muscles can exist without training because they are essential for basic bodily functions such as breathing, digestion, and maintaining posture. These muscles are often referred to as involuntary or smooth muscles and are not under conscious control. Additionally, some muscles may not be regularly used or activated, leading to a lack of training and potential weakness. However, regular physical activity and strength training can help to strengthen and condition these muscles for improved overall function. **

Yes, you do have muscles without training. Muscles are a part of the human body and are necessary for movement and support. Even without specific training, muscles are used in everyday activities and are constantly being engaged to some extent. However, training and exercise can help to strengthen and build muscle mass. **

It is worth training muscles at any age, as regular exercise can help improve strength, endurance, and overall health. However, it is especially beneficial to start training muscles early in life to establish good habits and prevent age-related muscle loss. Consistent strength training can also help prevent injuries, improve posture, and enhance athletic performance. It is never too late to start training muscles, as the body can still benefit from increased strength and mobility at any age. **

While endurance training primarily focuses on improving cardiovascular fitness and stamina, it can also help build lean muscle mass to some extent. Endurance exercises like running, cycling, or swimming can engage and strengthen muscles, especially in the legs and core. However, for significant muscle growth, incorporating strength training exercises that target specific muscle groups is more effective. Combining both endurance and strength training in a workout routine can help achieve overall fitness goals and build muscle mass. **

No, muscles do not develop without some form of training or physical activity. Muscles require resistance and stress in order to grow and become stronger. Without regular exercise or physical activity, muscles will not develop or maintain their strength and tone. Therefore, it is unlikely that your friends have muscles without some form of training or physical activity. **

Muscles may feel soft after training due to a combination of factors. During exercise, muscles undergo stress and fatigue, leading to a temporary decrease in muscle tone and tension. Additionally, the body's natural response to exercise includes increased blood flow to the muscles, which can cause them to feel warm and relaxed. This combination of factors can contribute to the sensation of softness in the muscles after training. **