First decide upon the intent of practice before applying the Three Regulations (posture, breath, and intention).
For this training session, are you remediating specific imbalances, looking toward the systemic balancing of yin and yang within, or attempting to completely transcend yin and yang?
Once this is determined, then one can discern how to properly apply the Three Regulations.
For balance, enhance through opposition.
For transcendence, find the space between.