So to be clear you credit your fitness to the 30 min breathing and quick bodyweight exercise routine?
I have just been practicing Sudarshan Kriya[1] + Wim Hof[2] + Surya Namaskar[3] (no push-ups and mountain climbing) for the past month.
~1 hour a day.
[1] https://www.youtube.com/watch?v=0tX0M6EveGY