Non-Linear Process of Improvement

Strength training is like retirement investment. Regular contributions reap huge rewards. I call it the compounded interest of physiology. Sometimes you can make bigger contributions. Sometimes you make smaller ones. Broad skill practice has broad return. Narrow focus has higher possible yield with higher risk. Regularity creates solid portfolios.

You have one temple. Though we can 3D print new organs for you, some respect should be taken with some sort of regularity.
That said, don’t expect to see linear growth even with linear contributions. Some days you’ll be underrested. Some days you’ll be distracted. Some days you don’t want to show up. Some days the DOW is down. Some days the S&P is up. Sometimes max strength is good for a PR. Sometimes low intensity endurance work is the order of the day. Sometimes commodities are peaked. Some days the dollar is down and aluminum futures are peaked.
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There are so many different facets to what we call “fitness” and “health” that it’s immaterial how great you’re doing on any given day. It can’t be linear. The portfolio can’t always outperform. However, on average, as long as you make regular contributions, there will always be a reliable return over the long term.