Table 2.

Adverse Events during 3 months of active intervention

	Yoga		HE
Grade	n	Description of events	n	Description of events
Minimal	0		1	Ear infection
Mild	3	Increased low back pain HPV and ovarian cyst muscle spasm in calf	4	Skin rash Non-displaced fracture Increased ADHD symptoms Fall
Moderate	10	Increased back pain* Migraine Constipation (2 pts) Tooth pain and oral surgery Torn ligaments in knee Lapse in MAT Broken hand Bruised ribs Panic attack	6	Anemia Kidney pain Neuropathic pain Lump in breast Fluid in lungs/ COPD Knee pain
Severe	2	Diabetic ketoacidosis Septic left shoulder	1	Diabetic seizure
Total	15		12

Note: For number of adverse events by study arm, X² = 2.17, df = 3, p = 0.54

Eighteen participants reported at least one adverse event. Four participants had more than one adverse event.

^*There was only one adverse event probably related to the intervention. We graded it as moderate. A person with a substantive history of back pain and back spasms attended yoga class, where she had a painful back spasm while doing cat/cow and a seated side stretch with arms raised. Teacher had her rest and the spasm appeared to subside. She later reported that the severe level of pain (8/10) continued the rest of the day and into the next morning, only fully subsiding after about 4 days. Despite reassurance from her primary care provider, she chose not to return to classes.