Blood pressure is the measure of forces pushing outwards on your arterial walls during both the contraction and relaxation of the heart. The top number called your systolic blood pressure is the force as blood pumps out of the heart and into the arteries. The bottom number called your diastolic blood pressure is the force while the heart rests between heart beats.
Your arteries are made up of muscle and semi flexible tissues that stretch like elastic. The more force exerted on the walls, the more of a stretch results. If the tissue is stretched beyond the healthy limit repeatedly, this results in arterial dysfunction. This increase in workload and the poor contraction-relaxation coupling results in high forces on the walls, referred to as hypertension. Untreated hypertension can lead to vascular weakness and scarring which can increase your risk for stroke, aneurysms, and blood clots.

Over 76 million Americans have high blood pressure; this means one in three adults will be diagnosed with it at some point. These are some of the best ways to manage your blood pressure:
- Manage Stress
- Stay Physically Active
- Eat a Healthy Diet
- Maintain a Healthy Weight
- Refrain from Smoking
- Limit Alcohol
- Reduce Sodium Intake
Below is a chart from the American Heart Association that defines the cutoff points for healthy levels of both the systolic and diastolic values. It is a great idea to have your blood pressure measured on a regular basis because the earlier a problem is detected, the sooner you can make lifestyle adaptations.
Holding onto the side bars allows you to support your body weight while you walk. The load is transferred from your legs to your upper body which reduces the amount of effort it is taking to walk. Your cardiorespiratory system does not have to work as hard to move your body with the extra support. Holding on this way makes it easier on your body; less work = less calories expended.
Holding onto the handle right in front of you is a common offense as well, especially when you are walking at an incline. Walking or running up an incline forces you to shift your body weight forward and push yourself up that hill. By holding on to the treadmill, you allow yourself to lean back by extending your back and arms. The purpose of walking up that hill for the extra challenge is negated by leaning back. Shifting your weight forward while walking/running up that incline keeps your body upright, working your core and postural muscles.