Key points from article :
Lifestyle choices, such as diet and smoking, and illness accelerate biological age beyond one's chronological age.
That is your body is aging faster than expected.
They found that muscle weakness marked by grip strength is associated with accelerated biological age.
They modeled the relationship between biological age and grip strength of 1,274 middle aged and older adults using three "age acceleration clocks".
Both older men and women showed an association between lower grip strength and biological age acceleration.
"We've known that muscular strength ... biological link between muscle weakness and actual acceleration in biological age." Mark Peterson, lead author and associate professor.
"Studies must focus on how lifestyle and behavioral factors, such as physical activity and diet, can affect grip strength and age acceleration", he adds.
The study was carried out at the University of Michigan and results were published in The Journal of Cachexia, Sarcopenia and Muscle.