Sometimes the simplest and easiest things are the most powerful and walking is no exception. If you want to help get your erections back through exercise, probably the last thing you'd think of is walking. After all, most guys look down on walking as boring, ineffective and something women do to lose weight.
However, nothing could be further from the truth. Walking is incredibly powerful and is a fantastic help in improving your erectile strength and increasing blood flow. All of the superhealthy supercultures in the world do an abundance of walking. This is what our heart, and as I will show below, penis was built for. Walking is the easiest exercise to do and this is VERY important for many guys.
Many guys absolutely hate gyms, biking, jogging, competitive sports and all the "standard" forms of exercise that we're used to. Think of the people you know: what percentage of them are regulars in the gym or on the trails or streets? I'll bet it's less than 10 percent.
There was recently an article by the pointy-headed leader of Life Extension, William Faloon, where he admitted that he never exercised, until a recent health issue surfaced and that he "absolutely detest regular exercise of any kind and get no pleasure from it whatsoever."  Here is one of the most important health experts in the world who is just being honest and saying what most people won't admit in public.
You don't need equipment. You don't need to be around anyone. You don't need to sweat like a quarterhouse.
You just need to walk and here's some great erection-boosting reasons:
1. Miraculously Restore Endothelial Function. The endothelium. For most guys, that's the most important tissue in the body, because it pumps out nitric oxide and allows arteries to expand and erections to occur. And it is the endothelium that steadily gets damaged with a modern lifestyle, leaving many guys with erectile dysfunction and heart disease. I'll let one set of study authors speak for themselves: "Our results indicate that regular aerobic exercise can prevent the age-associated loss in endothelium-dependent vasodilation and restore levels in previously sedentary middle aged and older healthy men." 
Forget the Viagra and Cialis. Get out and walk!
2. Nitric Oxide and Blood Flow. One study of Japanese men and women found just what the doctor ordered: walking 5-7 times per week briskly for 30 minutes significantly increased nitric oxide. Yes, a simple 30 minute walk does the same thing Viagra does and, like Viagra, the study authors found that walking increased forearm blood flow. In other words, more blood was moving and you can bet that's better for erections. And one thing that is critical to note: just 30 minutes per day provided excellent results. Imagine what an hour a day will do...
3. Blood Pressure. One of the biggest enemies of erections is high blood pressure and research has shown that walking lowers blood pressure. For example, one study found that folks with mild hypertension who did 10,000 or more steps per day lowered their systolic blood pressure by an average of 10 points (from 149 to 139).  Keep in mind that lowering blood pressure always means that your arteries, including the ones to your penis, are opening up and expanding and letting blood flow where it should.
The study authors were clear that it did not matter how long or how hard the individuals exercise: they still got a dramatic lowering of blood pressure. In other words, you do not have to exercise hard to stay hard! You might want to read my link on Blood Pressure and Erectile Dysfunction for more details.
So the bottom line is that you don't have to be gym rat like me and risk life and limb fighting gravity with heavy bars and steel plates. Nor do you have to set up an elaborate marathon schedule.
Really you just need to open your front door and put one foot in front of the other. It's really that simple...
2) Circulation, 1999;100:1194-1202, "Regular Aerobic Exercise Augments Endothelium-Dependent Vascular Relaxation in Normotensive As Well As Hypertensive Subjects"
3) Hypertens Res, 2000 Nov, 23(6):573-80, "Walking 10,000 steps/day or more reduces blood pressure and sympathetic nerve activity in mild essential hypertension"
4) Circulation, 2000;102:1351, "Regular Aerobic Exercise Prevents and Restores Age-Related Declines in Endothelium-Dependent Vasodilation in Healthy Men"