ATP (Adenosine Tri-Phosphate) binds to the myosin head in a sarcomere( the smallest unit of contraction in a muscle), which cocks the head into position for the power stroke which shortens the sarcomere, and thus the muscle pulls its insertion towards its origin.
ATP
The macromolecule that stores energy in muscles is glycogen. Glycogen is a polysaccharide that serves as a readily available energy source for muscle cells during physical activity.
Muscles store glycogen as a source of energy for physical activity. Glycogen is a form of glucose that is stored in muscle cells and can be quickly converted into energy when needed during exercise. This stored glycogen helps muscles maintain their strength and endurance during prolonged physical activity.
Skeletal muscle is rich in ATP as it is the primary energy source for muscle contraction and movement. Skeletal muscle has high energy demands and relies on ATP for fuel during exercise and physical activity.
The preferred source of energy for the heart muscle is fatty acids. Fatty acids are "good fats" that are main sources of energy for cells.
Carbohydrates
Protein energizes muscles, primarily.
Cooking uses heat energy as the main source. It is the main activity that uses heat as a source of energy.
Vitamins and minerals are essential nutrients that do not provide energy to the body directly. They have specific roles in various bodily functions such as supporting immune function, bone health, and enzyme activity, but they do not serve as a source of calories for energy production.
Creatine Phosphate cannot directly supply energy to a cell, instead, it stores energy released from mitochondria. Whenever sufficient ATP is present, an enzyme in the mitochondria (creatine phosphokinase) promotes the synthesis of creating phosphate, which stores excess energy in its phosphate bond.
Carbohydrates are stored in muscle as glycogen. Glycogen serves as a readily available energy source during physical activity and is broken down into glucose to fuel muscle contractions. Adequate glycogen stores in the muscles are important for optimal athletic performance.
We get most of our energy directly or indirectly from the Sun.