<p>I haven’t read the entire thread, but as a small piece of advice:</p>
<ol>
<li>Make sure you have the right shoes for you. </li>
</ol>
<p>You aren’t fit properly in a big store. Go to a runner’s store if one is around you. They should ask you to walk for them so they can see how your gait works and how your foot hits and moves on the ground. </p>
<ol>
<li>Change your shoes more often than you would like.</li>
</ol>
<p>The cushioning wears out pretty quickly. You can see the standard advice on line but it happens faster if you’re heavy. Some people have a couple of pair and rotate them. </p>
<ol>
<li>Run as often as possible on level ground. </li>
</ol>
<p>Sidewalks and roads have camber and as you pick up speed and distance you could start to experience a number of ills from having one leg hit slightly lower than the other. E.g., pain in the hip, back, knee, foot. Level = good. </p>
<p>Finally, a small bit of form advice:</p>
<ol>
<li>Relax your arms and hands. </li>
</ol>
<p>Let them fall and rise as naturally as possible. You aren’t racing so there’s no need to hold your arms up. Lift them a little when you run uphill and drop them when running down - rather than clenching them to your chest.</p>
<ol>
<li>Develop a sense of stride rate and stride length. </li>
</ol>
<p>There are 3 components to speed: rate, length and time foot stays on ground (essentially foot friction). You will very quickly hit your natural stride length. If you try to push that longer, especially if you’re heavy, you will be running inefficiently, literally jamming your leg into the ground and likely hurting yourself. Run at your natural stride length but turn it over faster, both by reducing the friction and increasing the frequency. You’ll find this transfers some of the effort from your muscles, which have limited capacity and which become heavy with lactic acid, to your lungs, which can have nearly unlimited capacity. Life gets easier. You can increase your stride length over time, but only with care.</p>