Exercise shouldn't be a last resort. The list of benefits exercise provides is insane!
Benefits of Aerobic Exercise:
Increased maximal oxygen consumption (VO2max)
Improvement in cardivascular/cardiorespiratory function (heart and lungs)
Increased maximal cardiac output (amount of blood pumped every minute)
Increased maximal stroke volume (amount of blood pumped with each beat)
Increased blood volume and ability to carry oxygen
Reduced workload on the heart (myocardial oxygen consumption) for any given submaximal exercise intensity
Increased blood supply to muscles and ability to use oxygen
Lower heart rate and blood pressure at any level of submaximal exercise
Increased threshold for lactic acid accumulation
Lower resting systolic and diastolic blood pressure in people with high blood pressure
Increased HDL Cholesterol (the good cholesterol)
Decreased blood triglycerides
Reduced body fat and improved weight control
Improved glucose tolerance and reduced insulin resistance
Benefits of Strength Training:
Increased muscular strength
Increased strength of tendons and ligaments
Potentially improves flexibility (range of motion of joints)
Reduced body fat and increased lean body mass (muscle mass)
Potentially decreases resting systolic and diastolic blood pressure
Positive changes in blood cholesterol
Improved glucose tolerance and insulin sensitivity
Improved strength, balance, and functional ability in older adults
I'm sure this isn't everything, but a good start.
We all need to have regular physical activity to stay healthy!
Links:
http://www2.gsu.edu/~wwwfit/benefits.html
http://www.mayoclinic.com/health/exercise/HQ01676