The phrase "actual level of activity" is correct and usable in written English.
It can be used when discussing or analyzing the true or real extent of engagement or performance in a particular context, such as business, research, or personal productivity.
Example: "To assess the project's success, we need to evaluate the actual level of activity over the past quarter."
Alternatives: "real level of engagement" or "true extent of activity".
Although neither the NOAA nor Gray had ever forecast such high levels of activity, even the midseason outlooks fell far short of the actual level of activity.
Data on head counts, actual level of activity, attrition or migration rate, should be validated and made readily available to stakeholders and researchers.
It has to be noted that the actual level of activity does not affect the proportional order of the impact associated with each individual intervention and that of treatment combinations.
In particular using reports of activities that result in sweating as an indicator of strenuous activity might not provide an accurate measure of prevalence for strenuous activity because sweating will be influenced by other characteristics, such as the participant's general fitness, BMI, as well as the actual level of activity.
These results suggest that the patient's perceived activity levels, rather than their actual levels of activity, maybe more important predictors of recovery.
Although the majority of participants reported that they had not returned to "normal" activity levels at baseline, it is possible that their actual levels of activity may have been relatively "normal".
Probably the perception of physical activity does not always reflect the actual level of physical activity.
This study sheds light on Somali women's views and experiences of physical activity, and there is a need for more information concerning the actual level of physical activity in order to offer adequate support to the group.
However, the actual level of physical activity of both groups was not assessed in this survey.
To quantitatively assess the actual level of proteolytic activity in fluids, we used the FASC assay [ 16].
Participants might have over- or underreported their actual level of physical activity, and the reliability of a single item measurement for self-perceived health might be limited.
