"physical fragility" is correct and usable in written English.
You could use it to refer to someone or something's physical weakness or lack of strength, such as in the example sentence: "The elderly woman's physical fragility made it difficult for her to get around without help."
It elegantly conflates sporting prowess, the dangers of traffic accidents and the physical fragility of the mind.
Retirees are often counted among the most vulnerable of the city's residents, not only because of physical fragility, but also because so many are surviving on limited means.
As time went on, it became increasingly clear that his physical fragility was going to prove too big an obstacle for him to overcome.
Perhaps it is in part the brevity of their reign that has led these woodland flowers to be regarded with such reverence and affection: their fleeting appearance, coupled with their physical fragility, invests them with a kind of sacredness.
Many online reviews of the album comment not only on its quality but on its physical fragility, which is directly connected to its scarcity on Amazon, for example, reviewers discuss the difficulty of preserving their LP despite repeated plays.
This great trouper, now 85, used her increasing physical fragility to maximum dramatic effect, building the anthem of show business survival from a dismissive casualness to a peak that was not the usual triumphal assertion of ego.
This brief flaring of Didion's writerly power has its corollary in her admission of her own increasing physical and emotional fragility.
This comprehensive approach allows the identification of different aspects related to physical vulnerability, social fragility, and lack of resilience that can be improved, thus enhancing integrated disaster risk management actions.
Carreño et al. discuss their holistic model for disaster risk assessment that integrates physical risk, socioeconomic fragility and addresses frequent lack of resilience by testing its application to the city of Manizales, Colombia.
These include the need to train enough ward staff to recognize and cope with the physical and emotional fragility of former ICU patients and their families, and to be prepared to engage with patients and meet their needs.
The contrast between the delicacy of the orchids' florets and the mighty clints (limestone pavements), between seeming fragility and physical power, was astounding.
