This will help in .Finally, your inner self will improve. Your lungs and heart will be put to the test under calm, low stress conditions.  ProGain 350  Holding your breath and swimming helps expand your lungs and pump the heart, giving you a boost in health. It would be normal to get out of the pool breathing easier and feeling better because of this.To exercise to build muscle, lift lots of weight, about 80 to 85% of the max…