This is why Marine boot camp, without a doubt, is the most rigorous and challenging, both physically and mentally, than basic training programs of all the other military branches. New recruits are also required to study and memorize an extreme amount of information, including: 1  Basic drill and ceremony.  USMC Rank.
There are basically 2 ways to increase your stride length: 1  Run upwards on some type of an inclined surface, or. 2  Run with some type of resistance behind you. (i.e., parachutes, flexbands, sleds, etc.)
Increase the speed. If you have been walking at 3 mph, boost the speed to 3.5 and then 4 mph. You may have to do that for only a couple of minutes at a time at first until you build your speed walking technique and capacity. You can also vary the incline to increase the intensity of your workout. By walking or running uphill, you will challenge your muscles in new ways as well as burning more calories at the same speed. You can measure how effective that is by noting your breathing intensifying and your heart rate being raised.