If the mind lacks the necessary strength for constant watching of breath, then restriction of hatha yogic practices is suggested. —- Maharishi Ramana.
Comments; Meaning of Maharishi Ramana is that if any aspirant is not able to do do Vippasna (Observation) of breath, then for him the practice of Hata Yoga is suggested by the Guru. Because we comes from different lives and our karmas are also different. Our practice gives results according our previous lives.That is why different type of practice is needed.