Turn on 2-Step Verification. When you enable 2-Step Verification (also known as two-factor authentication), you add an extra layer of security to your account. You sign in with something you know (your password) and something you have (a code sent to your phone). Go to the 2-Step Verification page. You might have to sign in to your Google Account.
Lung function will also be affected by, or co-vary, with other factors, such as smoking and chronic respiratory diseases. However, the relationships between these variables are not always obvious as some smokers never develop symptoms and lung function decline, while some never smokers become ill, etc [1, 2].
Lung capacity is the amount of oxygen that the lungs can hold. Increasing lung capacity helps the lung to drag more oxygen. It also boosts more absorption of oxygen and thus contributes towards a better overall health. Lung capacity is influenced by many factors such as age, weight, size, illness and lifestyle.