Archive · 23 Dec 2025
Study Shows Fitness Decline Starts at 35
A big study that lasted 47 years found that people start to get less fit and strong when they are 35 years old.
This happens to everyone, even if they exercise a lot.
The study looked at over 400 people and had them do different exercises like lifting weights, jumping, and cycling.
The study found that women start to lose muscle power at 32, and men a few years later.
Both men and women start to get tired more easily at 45.
The good news is that if people start exercising, they can get a little bit stronger and fitter, even if they can't stop the decline completely.
The researchers want to keep studying to find out why this happens and how exercise helps.
Physical fitness abilities start to decline at age 35, according to a 47-year study.
Cardiovascular endurance and muscle strength deteriorate after peak age, with a 30-48% drop by age 63.
Women lose muscle power around age 32, while men experience a decline a few years later.
Aerobic endurance declines at age 45 for both genders.
Physical activity can slow the decline in performance by 5-10%, even if it cannot completely stop it.
- Who
- Over 400 men and women aged 16 to 63
- What
- A 47-year study on physical fitness decline
- When
- Published in the Journal of Cachexia, Sarcopenia and Muscle
- Where
- Sweden
- Why
- To track changes in physical capacity over time and the impact of physical activity
- Study Duration
- 47 years
- Participants
- Over 400 men and women
- Peak Fitness Age
- 35 years
- Physical Capacity Decline by 63
- 30-48%
- Muscle Power Decline Age (Women)
- 32 years
- Muscle Power Decline Age (Men)
- A few years after 32
- Aerobic Endurance Decline Age
- 45 years (both genders)
- Potential Improvement with Exercise
- 5-10%