muscles react,which means they increase in size
Push ups will help to build up your arm muscles and help stabilise your core.
When exercising the pH in the muscles becomes more basic. This is because an increase in temperature in the muscles during exercise reduces the attraction pf haemoglobin with oxygen.
Is when your heart beats fast!
Skeletons don't have muscles, dumbshit.
You do not increase the length of your muscles with weight training, just their strength and for a man, their bulk.
the diaphragm and intercostal muscles increase in strength allowing for greater expansion of the chest cavity
The muscles will atrophy (shrink) if not used.
When activity increases, the body's heart rate and breathing rate increase to supply more oxygen to the muscles. This extra oxygen helps produce more energy for the muscles to use during the activity. Additionally, the body may start to sweat to regulate its temperature and prevent overheating.
the muscles of the diaphragm and intercostals increase in strength, allowing for greater expansion of the chest cavity.
Running long distance will require more energy. For this number of mitochondria will increase in the muscles.
you excersise