Charak Samhita
व्यायामादूष्मणस्तैक्ष्ण्याद्धितस्यानवचारणात्। कोष्ठाच्छाखा मला यान्ति द्रुतत्वान्मारुतस्य च ॥३१॥
[Movement of dosha from koshtha (gut) to shakha (periphery)] As mentioned earlier, the vitiated doshas move from the alimentary tract region (koshtha) to the periphery (shakha) i.e. raktadi dhatu and skin - due to several reasons such as excessive exercise, excessive heat, intake of unwholesome diet and regimen, and an excess pressure of fast-moving vata.
english translation
vyAyAmAdUSmaNastaikSNyAddhitasyAnavacAraNAt। koSThAcchAkhA malA yAnti drutatvAnmArutasya ca ॥31॥
hk transliteration by Sanscript