Sarcopenia can be defined as significant loss of muscle function in older individuals, usually defined in terms of reduction in grip strength and low gait speed.
Specific criteria include 1:
- grip strength
- < 26 kg for men
- < 16 kg for women
- low lean body mass based - appendicular lean mass index
- < 0.789 for men
- <0.512 for women
Dual energy x-ray absorptiometry (DEXA) is the gold-standard imaging modality in the evaluation of sarcopenia and has been used for the greatest number of trials 1.
Ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI) have also been used 1.