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First, let's understand the two terms: anabolic and catabolic processes. Anabolic processes are those that build up larger molecules from smaller ones, while catabolic processes break down larger molecules into smaller ones. In the context of exercise and muscle growth, anabolic processes support muscle building, and catabolic processes may lead to muscle breakdown.

When it comes to the increase of muscle mass, anabolic processes play a significant role. During resistance or strength training exercises, the muscle fibers experience tension and damage, leading to a response from the body to repair and grow the muscle tissue. The body does this by increasing the synthesis of proteins and other molecules that make up the muscle fibers, which is an anabolic process. An essential hormone that is associated with muscle growth is testosterone, which promotes protein synthesis and muscle recovery.

Catabolic processes also occur during exercise, primarily to provide energy to the body. As you exercise, your body breaks down energy sources like glycogen and triglycerides to generate ATP (Adenosine Triphosphate), which is the main source of energy for cells. This process of breaking down larger molecules into smaller ones is catabolic. Inconsistent or excessive levels of catabolic processes, like the release of cortisol (a hormone involved in catabolism), can hinder muscle growth by leading to muscle tissue breakdown.

Research studies have shown that resistance training, which typically involves lifting weights or using body weight as resistance, increases muscle protein synthesis, demonstrating the role of anabolic processes in muscle growth. Studies have also shown that while catabolic processes like the breakdown of energy sources are essential during exercise, excessively high levels of catabolism can have adverse effects on muscle growth. In conclusion, physical exercise to increase muscle mass involves both anabolic and catabolic processes. Anabolic processes are crucial for building muscle mass, while catabolic processes provide energy during exercise. However, excessive catabolism can hinder muscle growth. Evidence from research studies supports the involvement of both processes in exercise-induced muscle growth.