Activities

Activities are non-compound interventions that the engine still models with magnitude and timing.

Activities available

• Sleep — duration, quality (modulated by sleep apnea condition)
• Exercise — cardio, HIIT, strength training (intensity 0–1)
• Meditation — duration affects cortisol + parasympathetic tone
• Breathwork — short, high-impact intervention on autonomic state
• Social — affects oxytocin proxy and parasympathetic tone
• Sunlight viewing — anchors circadian rhythm, suppresses melatonin

Intensity parameter

• Most activities expose a 0–1 intensity slider
• Affects magnitude of downstream signal changes
• Defaults are reasonable; lean on real-world feel to tune