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Tuesday: 17 February 2026
  • 17 February 2026
  • 19:50
At Age Forty Why Does Fatigue Intensify and Then Lessen After Sixty

Khaberni - A recent study has shown that the forties represent the lowest levels of energy, before the sixties witness a stabilization that could renew vitality once again.

Many people used to believe that physical and mental energy gradually and linearly declines with age. However, a recent study published in "Science A" suggests that the forties, in fact, represent the lowest point for energy levels before the sixties open the door to the possibility of a vitality rebound.

According to the scientific journal, this discovery redefines our understanding of the aging process and offers a practical perspective on how to deal with critical periods in life’s journey.

Researchers see the forties as combining several biological transformations at one time, including a gradual loss of muscle mass, a slowdown in metabolic rate, and a decreased efficiency in recovery after physical exertion.

There is also a disruption in the synchronization of biological systems; sleep becomes lighter, cellular energy production in mitochondria declines, and there is a clearer fluctuation in hormones.

Studies indicate that these changes, although simple individually, accumulate to make any physical effort seem more difficult even in the absence of illness. Researchers describe this stage as a combination of decreased muscle mass, reduced metabolism, and difficulty recovering, forming what is known as the “energy trough” in the forties.

The decline in energy at this stage is not only linked to biological factors, but also strongly intersected by psychological stress.

In the forties, work responsibilities, parenting, supporting elderly relatives, and social commitments often escalate. This continuous mental load depletes internal resources and reinforces the sense of chronic fatigue.

The brain finds itself in a constant state of operation to maintain performance, which solidifies a persistent feeling of tiredness due to an imbalance between capabilities and daily demands.

Contrary to popular belief, the energy curve does not continue to decline after forty. Upon reaching sixty, some biological systems begin to stabilize, such as hormonal rhythm becoming regular, lifestyle stabilizing, and social restrictions lessening.

Studies suggest that individuals who maintain regular physical activity may regain a significant amount of their energy, and some may even feel more vital than they were in their forties, especially if their lifestyle is more balanced.

The analysis concludes that the sixties, instead of being a phase of inevitable decline, may represent a period of stability or even a rebound in energy for some.

Imagine a 42-year-old person who does not suffer from chronic diseases. Their sleep is of lower quality, their recovery after exercise is slower, and daily pressures of work, family, and financial obligations weigh on them. Cellular energy production gradually decreases, muscles weaken bit by bit, and sleep becomes intermittent. Each individual change seems limited, but their accumulation generates a constant sense of fatigue.

In contrast, by the time they reach 65 years of age, with a more regular lifestyle, appropriate physical activity, and reduced stress levels, they may experience a clearer energy stability compared to their forties, despite aging.

This discovery highlights the importance of understanding biological and psychological transformations that come with age and provides a practical basis for dealing with periods of natural fatigue and striving to achieve a sustainable balance in energy levels.

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