The phrase "all of them improved" is correct and usable in written English.
You can use it when discussing a situation where multiple subjects have shown progress or enhancement in some aspect.
Example: "After the training program, all of them improved in their performance metrics."
Alternatives: "they all got better" or "each of them made progress".
A 2014 study in Gerontologist reviewed 31 studies that focused on how these specific endeavors affected older adults' mental skills and found that all of them improved several aspects of memory like recalling instructions and processing speed.
While some representations were better than others in some situations, all of them improved performance.
Of the students that received the lowest grade in the No Template condition most improved their grade significantly in the Titles Template condition and all of them improved their grades significantly in the Profile Template condition.
All of them improved their scores at Y 3, which represents the calculated Y value at X 3 and which was included to evaluate specifically the impact of the previous HEC training.
Of the patients with survival of more than 1 year, 8 had had difficulties in sitting before surgery and all of them improved and were able to sit with support at follow-up.
But not all of them improve on existing conversion technology.
All of them improve the leading edge flow patterns and significantly affect the size of the predicted laminar separation bubble.
Partnering with subsistence, semi-skilled and experienced farmers, we provide different levels and types of support to each -- helping all of them improve production and revenue, as well as economic and ecological sustainability.
Response to second-line therapy, progression-free survival (PFS) and overall survival (OS) are linked to the PFI, all of them improving as the PFI increases.
21 All these approaches provide iPSCs and many of them improve the yield of pluripotent cells.
