(I) Effects of sports rehabilitation on energy metabolism
Through exercise training, not only can the human body's energy supply potential be improved, but also energy saving during exercise can be saved. It shows that after completing the same intensity of work, after the system training, the oxygen demand is reduced and the energy consumption is also reduced, that is, when the same exercise load is completed, the trainer consumes less energy.
The main reasons that long-term training can save energy use are: training improves motor skills, makes movements more coordinated and automatic, and thus reduces unnecessary movements, so that energy use is more economical; and exercise training is also Improve breathing, circulatory system function, improve work efficiency. In this way, the energy consumed by the powered organs themselves is also reduced.
(b) Effects of exercise on glucose metabolism
Physical activity can significantly regulate sugar metabolism. During long-term, low-intensity exercise, sugar functions as aerobic oxidation. As exercise continues, the use of free fatty acids increases, but lipids cannot replace sugar for energy. Because suitable sports can improve the regulatory function of the central nervous system, strengthen the metabolism of the organism and promote the full use of glucose in the muscle tissue. In particular, with the increase of exercise time, blood glucose rapidly reaches muscle tissue, and the ratio of blood glucose decomposition and energy supply increases, thereby lowering blood glucose levels.
(III) Effects of exercise on fat metabolism
The research results at home and abroad in recent years have shown that the proper physical rehabilitation activities have a significant impact on lipid metabolism. The effect is reflected in: When the cholesterol level in the blood is significantly lower than during exercise, especially when the blood cholesterol level is higher, the reduction is even more pronounced. After long-term sports rehabilitation activities, serum cholesterol levels were significantly lower than those of peers who did not engage in sports. Physical exercise can effectively prevent diseases with varying degrees of lipid metabolism, such as coronary heart disease, cerebrovascular disease, and hypertension.
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A wooden box is a container made of wood for storage or as a shipping container.
Construction may include several types of wood; lumber (timber), plywood, engineered woods, etc. For some purposes, decorative woods are used.
Boxes and crates are not the same. If the sheathing of the container (plywood, lumber, etc.) can be removed, and a framed structure will remain standing, the container would likely be termed a crate. If removal of the sheathing resulted in there being no way of fastening the lumber around the edges of the container, the container would likely be termed a wooden box.
The strength of a wooden box is rated based on the weight it can carry before the cap (top, ends, and sides) is installed. "Skids" or thick bottom runners, are sometimes specified to allow forklift trucks access for lifting.
Performance is strongly influenced by the specific design, type of wood, type of fasteners (nails, etc.), workmanship, etc.
Some boxes have handles, hand holes, or hand holds.
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