The good news -- for Walker, Donovan and countless other men -- it's never too late to start fixing the problems

"I changed my lifestyle and cut back on some running, according to my nutritionist and doctor. I started taking a couple vitamins which I have never done and I just got re-tested and I am happy to say all my information -- all of my trouble marks -- were significantly dropped," Donovan said.

Some insurance companies will cover the costs of the tests under their prevention programs. Donovan was so happy with the results he sent his wife and mother in to get their own results. As for Walker, he said he feels like he is feeling his own age outside and in.

"Just small changes, not huge changes, to my life … the outcome has been huge. You can live longer, but what is the point unless you are healthy?" Walker said.

Male Physicals Checklist

Men in their 20s should have these items checked ...check
Blood Pressure - Check every two years. Normal range is no higher than 140/90. Tip - Home readings are often more accurate because they avoid the anxiety some have visiting a doctor's office.
Testicular Exam - The highest rates of testicular cancer occur between the teens and 40 years old. Tip - A doctor can explain how to do your own self-examination.
Skin Cancer Screening - Men have a higher rate of skin cancer than women. Yearly checks are helpful to monitor any growth in moles or spots on the skin.
Eye Exams - Surveys show 1/3 of adults don't get regular eye exams. Checks should include tests for glaucoma, macular degeneration and retinopathy.
Cholesterol Check - 220 is the magic number to stay below for overall cholesterol. Triglycerides should be no more than 150 milligrams.

Men in their 30s should have these items checked ...check
Thyroid Test - In men, hyperthyroidism causes erectile dysfunction, low sex drive and ejaculation problems.
Belly Check - Measure your waist, if it is more than 40 inches, that is a red flag for heart disease.
Blood Pressure - Check every two years. Normal range is no higher than 140/90. Tip - Home reading are often more accurate because they avoid the anxiety some have visiting a doctor's office.
Testicular Exam - Ninety percent of men who received an early diagnosis survived. Tip - A doctor can explain how to do your own self-examination.
Skin Cancer Screening - Men have a higher rate of skin cancer than women. Yearly checks are helpful to monitor any growth in moles or spots on the skin.
Eye Exams - Surveys show 1/3 of adults don't get regular eye exams. Checks should include tests for glaucoma, macular degeneration and retinopathy.
Cholesterol Check - 220 is the magic number to stay below for overall cholesterol. Triglycerides should be no more than 150 milligrams.

Men in their 40s should have these items checked ...check
Same checks as 30s, minus the testicular cancer screening.
Vitamin D Check - Some studies have found men with low levels of vitamin D have higher incidence of heart attacks. It is a common problem for men in the northern states, who work indoors or don't drink milk.
Diabetes Screening - If not covered by insurance, many drugstores offer free testing.

Men in their 50s should have these items checked ...check
Same checks as 40s.
Colonoscopy - Ninety percent of colorectal cancer is curable when found in the early stage, but about 39 percent of cases are discovered at stage III.
Bladder Cancer Screening -Caucasian men or men who smoke have a higher rate of this cancer. In the early stages it is symptomless.
Prostate Cancer Screening - This cancer affects 1 in 6 men.
Metabolic Syndrome Screening - It's a syndrome with a higher risk of heart disease and diabetes. Get screening if your waist measures more than 40 inches, low good cholesterol, high triglycerides, high blood pressure and a high fasting glucose.
Hearing Test - By 60, 1 in 3 adults is losing hearing. Men have a higher risk of noise-induced hearing loss. This test is voluntary which means a doctor has to request it.
Fecal Occult Test - This is a test for microscopic blood in the stool which is a sign of intestinal problems, like Crohn's disease and colorectal cancer.

Men in their 60s should have these items checked ...check
Same checks as 50s.
Bone Density Test - It is a myth that osteoporosis is a woman's disease. Six percent of men over 50 will break a hip and five percent will suffer a vertebral fracture.
Abdominal Aortic Aneurysm Screening - This test which checks the largest artery in your body, which is good for smokers to have.