Muscle Fatigue: Why Do Muscles Shake When Lifting?

Muscle trembling during exercise is a common sign of muscle fatigue, indicating that muscles are working hard. This occurs due to factors like energy depletion, waste product accumulation, and electrolyte imbalance. ATP is crucial for muscle energy, but its levels drop during exercise, leading to fatigue. Lactic acid buildup can also hinder muscle contraction. Electrolytes are vital for muscle function, and their loss through sweat can cause inefficiency. While trembling is usually normal, severe symptoms may require medical attention. Understanding these factors helps manage muscle fatigue effectively.

Why is it important to maintain a balance of electrolytes during exercise?

Under what circumstances should one be concerned about muscle trembling?