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the diaphragm and intercostal muscles increase in strength allowing for greater expansion of the chest cavity
the muscles of the diaphragm and intercostals increase in strength, allowing for greater expansion of the chest cavity.
By using your muscle you are strengthening them so all you have to do is use them to increase the strength of the muscles increase the load.
Muscles get their strength from exercise.
Intercostal muscles increase in strength due to being repeatedly used in exercise, so to strengthen them you will have to do endurance training. The stronger the intercostal muscles the more air you can inhale as they pull your rib cage out giving you a larger thoracic cavity.
The answer is nothing ...lolz..:P
During exercise our blood circulation speed increases. It effect in amino acid and a molecule ATP which causes muscles to increase strength.
If you exercise everyday, you'll get strength, and muscles.
Exercise places greater oxygen demands on the body, therefore signaling the respiratory center to increase the rate of respiration in order to increase the oxygen supply to the body's muscles and other tissues.
strength and size
You do not increase the length of your muscles with weight training, just their strength and for a man, their bulk.
Doing pushups will increase your upper-body muscles and strength.