Please allow me to share my personal experience here. I'd do it differently and better if only I can be given another chance based on the past experience learnt.
Before my bedridden mum passed away, I was her main caregiver. As she was my mum, I'd wished to care for her myself instead of employing a domestic maid. That was the only time I spent so much time looking after a bedridden person.
Prior to that, I was an active person and could routinely jog between 4 km and 10 km several times per week. In addition, I swam a lot and played all kinds of games. However, from the time I took to caring for her, my active lifestyle was reduced to almost zero. My elder sister helped out whenever she can extricate herself from her own family chores.
Initially, I was inexperienced in nursing care and I actually helped her sit on the portable toilet bowl to ease herself, and to bathe (or wipe) her. To change the bedsheet and pillow cases, I lifted her from the bed. Many times, and to ease my sister's help, I'd vacuum and mop the floor, and scrub the bathrooms too. Worst still, I was a stickler for perfection in everything I do. These strenuous work took its toll on my backbone.
One day, while walking to my car (I should have walked more instead of driving!) I felt pain in my backbone. The pain persisted. As I was healthy in other aspects, I sought treatment from a Chinese acupuncturist for some time. It didn't help. I was also treated with moxibustion but it didn't work too. Finally, the excruciating pain forced me to seek Western medicine. An X-ray revealed one of my spinal discs was pressing on a nerve. There was no cure for such ailments. Traction of the spine and physiotherapy were prescribed to relieve my pain. There was only some improvement. As I reflected on my own predicament, I realised the only change that could have caused the spinal pain was my drastic change in lifestyle.
A part-time maid was recruited to help with some of the time-consuming chores. With the free time available, I reverted to my past active lifestyle gradually. After about half a year, I realised that my spinal pain had disappeared completely. To this day, I'm free of the ailment.
My only wish is to have someone to translate this comment into Chinese so that Internet friends here can learn of my experience and avoid the pitfalls. Regular exercise helps in the frequent use of bone structures and to slow down body-aging.