Out of the four bodily activities the most dangerous for a devotee is Over Sleeping
that leads to the other ones(eating,mating & defending)
Too much sleep is wasting time that could be used in KCON
it enchances the attraction for eating & mating
------- Srila Prabhupad to HH Candramauli Swami Maharaj
Bhagavad-gītā 6.16
nāty-aśnatas 'tu yogo 'sti
na caikāntam anaśnataḥ
na cāti-svapna-śīlasya
jāgrato naiva cārjuna
TRANSLATION
There is no possibility of one's becoming a yogī, O Arjuna, if one eats too much or eats too little, sleeps too much or does not sleep enough.