First of all, there is no consensus on whether to avoid
inversions during a woman’s menstrual cycle. The two opinions are
basically divided between those who think that no women should practice
inversions during menstruation and those who feel the choice varies from
woman to woman.
Those who encourage a ban on inversions cite fears
that certain physical problems may arise. Until recently, increased risk
of endometriosis was considered the most common risk. But since more
is known now about that disease, the idea has been debunked. There is
also a theory that inversions may cause “vascular congestion” in the
uterus resulting in excessive menstrual flow. If true, this
risk is probably most relevant for women who hold inversions a long time.
Some teachers say that since a woman’s energy is low during menstruation,
high-energy poses such as inversions should be avoided. This makes sense,
yet not all women experience low energy during menstruation; indeed, many
feel quite energized.
Philosophically speaking, menstruation is
considered to be apana, meaning that energetically, its vitality is
downward-flowing. The argument against inversions during menstruation
maintains that inversions will disturb this natural energetic flow.
However, inversions are recommended in some systems of yoga as therapy to
improve elimination of excess apana.
In Yoga: The Path to Holistic
Health, B.K.S. Iyengar recommends practicing inversions to alleviate
menstrual problems such as heavy flow and irregular periods.
The contradictions don’t stop there. Some teachers
recommend avoidance of inversions such as Sirsasana (Headstand)
and Sarvangasana (Shoulderstand) while suggesting no such caution
with other poses that invert the uterus, such as Uttanasana (Standing
Forward Bend) and Adho Mukha Svanasana (Downward-Facing
Dog).
Since I know of no studies or research that makes a
compelling argument to avoid inversions during menstruation, and
since menstruation affects each woman differently and can vary from cycle
to cycle, I am of the opinion that each woman is responsible for making
her own decision. Pay attention to how you respond to inversions
(indeed, ALL asanas) during your period. A short Headstand may be fine
while a longer one isn’t; maybe you will find that backbends or twists
adversely affect your period. If your energy is very low, restorative
poses may be just the ticket, though you may find a more active sequence
of standing poses alleviates cramps and the blues. You really won’t know what
works and what doesn’t until you feel it in your own body.
The bottom line is that Hatha Yoga is full of
contradictions and varied opinions, leaving each of us ultimately
responsible for our own choices. Pay attention to your body and discover
what works and what doesn’t—not just during your period but every day.