Not in Yoga

Roaming Mind -> Stress and energy drainage as mind keeps on tuning into different things  -> Weak Digestion -> Undigested Food/Ama (Toxins) -> Compromised Immune System

In Yoga

Still Mind -> Mind does not tune into different things -> Good Digestion -> No/Low Ama (Toxins) -> Normal Immune System

Note: Self abidance in Sanskrit language is called Swastha which also means good health.

*Yoga means still mind – not a physical posture.