For most people, changing from their current running technique to Pose Running technique is NOT something that is accomplished in a weekend, and it almost usually won't be accomplished without a few problems along the way. Although there is a great deal of variability from one person to another, there are some common problems people have when they begin Pose Running.
Most people who grow up wearing modern footwear, land on their heels and roll off their toes. Only using their knees to absorb the energy of the landing. Pose Running Technique requires the runner to land on his or her forefoot. This forefoot landing requires that the calves to do more work, since they are now used as part of the cushioning mechanism, along with the knees, to absorb the landing. To be more specific, landing on the forefoot puts an eccentric load on the calves, and as a result, they will have a tendency to get sore until they have had adequate time to adapt to the new technique.
Sore Feet and Arches
Some people who take up Pose Running will be so focused on the landing that they will over emphasis this part of the technique by pointing their feet down at too great of an angle, and/or with to much tension. This will cause soreness in the arches, and possibly other problems in the feet. The foot should be relaxed as it is placed on the ground. If any effort is being put into pointing the foot down prior to landing, then the technique will not work well.
What to do about these problems
First of all, take it slow and listen to your body. You must give your calves time adapt to the the new demands being placed on them. This is especially true if you are already in good condition. A lot of runners refuse to reduce their training while transitioning from their old technique to Pose Running Technique, and end up injured. If you are one of those runners who must obsessively put in X number of miles when you run, then your obsession is very likely going be a regular cause of running injuries though out your running career. After more than 35 years of running, if I could get runners to listen to one message, it would be, "Don't be obsessive about your training." I've seen a lot people ruin their bodies, because they don't know the difference between loving running and obsessing over running. There is a big difference.
Secondly, do not focus on the landing, focus on the pulling. If you focus on the landing, you are likely to start artificially pointing your toes to the ground. If you feel yourself doing this, stop, walk it off and then start again. When you restart, focusing on pulling.