I love yoga. I love running. From a physical perspective, these activities are definitely in contention. Yoga is expansive, opens the physical body and the chakras (energetic vortices). Running often results in muscular contraction, at times leading to physical and energetic misalignment. What’s a running yogi to do?
Seek balance. I run almost as many times a week as I practice yoga. Some weeks I run more and get achy. Some weeks less and I feel more balanced. Every body is different. My experience tells me that there is a point of equilibrium for everyone. A point where suka (hard) and sthira (soft) are in harmony.