It depends on the domain and the individual’s absorbency, among other things

• coding drill — Youwei felt if I put in a few months of coding drill, then I should be able to crack the FB interview. I doubt it
  • However, without the effort it is very unlikely.
• yoga — for my body, even a year of weekly practice may not get me into some of the toughest poses like … no examples needed
  • However, other poses are showing visible progress
• stamina — I think most people can improve in terms of lung/heart/mental capacity
• chin-up — (+ other strengths) i think most people can improve
• … now the most important domain
• weight via calorie — I think the body can be gradually conditioned to get slightly more used to calorie restriction.
  • “More used” may not be noticeable.
  • Impossible to measure. Only you know if you are “more used”. If you have a pessimistic attitude you won’t notice the “more used”.
  • I believe the body does get used to it — Buddhist philosophy. If you are left alone on Mars for x months your body would get used to low calorie.
  • Many people give up and relapse, but before the replace weight does improve.