नात्यश्नतस्तु योगोऽस्ति न चैकान्तमनश्नतः। न चातिस्वप्नशीलस्य जाग्रतो नैव चार्जुन ॥

nātyaśhnatastu yogo ’sti na chaikāntam anaśhnataḥ na chāti-svapna-śhīlasya jāgrato naiva chārjuna

Verily yoga is not for him who eateth too much, nor who abstaineth to excess, nor who is too much addicted to sleep, nor even to wakefulness, O Arjuna.

In plain words: Krishna tells Arjuna that yoga does not work for someone who eats too much or too little. It also does not work for someone who sleeps too much or too little.