There are few prerequisites for practicing yoga effectively. Krishna emphasizes the importance of moderation in eating and sleeping habits, as extremes in these areas can hinder spiritual progress.

Firstly, Krishna mentions that yoga is not for those who eat excessively (atyashnatah). Overindulgence in food can lead to lethargy, heaviness, and dullness of the mind, making it challenging to engage in the disciplined practices of yoga. Similarly, yoga is also not for those who eat too little (ekantamanashnatah), as malnutrition or inadequate nourishment can weaken the body and mind, hindering one's ability to focus and concentrate during yoga practices.

Additionally, Krishna states that yoga is not for those who sleep excessively (atisvapnashilasya). Excessive sleepiness or laziness can prevent individuals from dedicating sufficient time and energy to their spiritual practices. On the other hand, yoga is also not for those who stay awake excessively (jagrato naiva), implying that sleep deprivation or insomnia can disrupt mental clarity, concentration, and overall well-being, thus impeding progress on the yogic path.

By highlighting the importance of balance and moderation in eating and sleeping habits, Lord Krishna underscores the holistic nature of yoga practice. Yoga is not merely a set of physical exercises or techniques but a comprehensive approach to harmonizing the body, mind, and spirit. It requires a lifestyle conducive to health, vitality, and mental clarity, characterized by mindful eating, restful sleep, and balanced activity.

This verse serves as a reminder to aspiring yogis that success in yoga practice depends not only on performing postures and breathing techniques but also on cultivating a balanced and disciplined lifestyle. By maintaining moderation in eating and sleeping habits, practitioners can optimize their physical and mental faculties, paving the way for deeper spiritual experiences and self-realization.