kamma wise why cant i do a steady practice I have ups and downs in my practice  (time doing formal mediation - time being mindful in daily life - doing good stuff avoiding bad stuff etc) 

and also ups and downs in completely mundane issues as well  being lazy not doing anything for days to do stuff for my own benefit than doing lots of stuff (washing the house - exercise etc)  than back to nothing  )

I had times in the past where i mediated every day (in retreat but also at home)  and times i did stuff like exercise study stuff etc 

now im in a slump for a few months doing almost nothing  -  i wonder how is it explained kamma wise  ....  bad kamma from the past  ?  lazy kamma ?  is there no way to prevent this ?  

again asking from a kamma point of view  -  how to make a steady practice  and steady good mundane stuff can be great (do i need some tipping point of good vs bad kamma done in this specific lifetime)  but more than that WHY it happens 

also  : how effective is current life kamma compared to past live kamma ?  and recent kamma (1-3 months) in comparison to kamma made before (3months -99 years)
Firstly, if you keep wallowing in self-pity over your assumed past kamma, then this will not help you move forward. It's considered unwholesome. So, forget about it. Similar to the Buddha's Parable of the Poisoned Arrow, you should think about how you can get the arrow out and heal yourself, rather than examining the origins of the arrow.

Secondly, it sounds like you are afflicted with one of The Five Hindrances called Sloth and Torpor.

Here's some advice by Ajahn Brahm on this:


  Sloth and torpor is overcome by rousing energy. Energy is always
  available but few know how to turn on the switch, as it were. Setting
  a goal, a reasonable goal, is a wise and effective way to generate
  energy, as is deliberately developing interest in the task at hand. A
  young child has a natural interest, and consequent energy, because its
  world is so new. Thus, if one can learn to look at one's life, or
  one's meditation, with a 'beginner's mind' one can see ever new angles
  and fresh possibilities which keep one distant from sloth and torpor,
  alive and energetic. Similarly, one can develop delight in whatever
  one is doing by training one's perception to see the beautiful in the
  ordinary, thereby generating the interest which avoids the half-death
  that is sloth and torpor.


More advice by Gil Fronsdal here. I quote some parts of it below:


  The presence of sloth and torpor does not mean that energy is not
  available. It means we are not accessing it. With a change in
  conditions, energy may reappear in a moment. This can be seen clearly
  in young children who switch from being “tired” (while shopping, for
  instance) to being energetic (about an offer of ice cream, for
  instance) in a matter of seconds. The energy level depends on whether
  they evaluate the situation as boring or exciting.
  
  Chronic sloth and torpor may represent a lack of meaning or purpose in
  life. In this case, the antidote might involve taking time for deep
  inner reflection or thoughtful conversations with wise friends.
  
  When sloth and torpor are present and energy is weak, we do the best
  we can. When they are absent, energy will naturally be stronger.
  Rather than berating yourself when you are tired or praising yourself
  when you are alert, just keep practicing. Certainly it will help
  reveal the precious beauty of your own mind.