**3. Results**

The results obtained from the PPAQ-PL and WHOQoL-Bref questionnaires for the women in the second and third trimesters of pregnancy and intergroup differences (between the second and third trimesters) are presented in Tables 1 and 2.

No statistically significant differences in the declared values of total energy expenditure (*total activity* and *total activity of light intensity and above*) were found among the women surveyed (Table 1). However, it was shown that the PA intensity differed significantly (*p* ≤ 0.05) depending on the trimester of pregnancy. This concerns in particular *sedentary activity* (group of women in the second trimester: 30.4 ± 21.6 MET-h/week, group of women in the third trimester: 35.5 ± 23.1 MET-h/week) and *moderate activity* (42.7 ± 45.2 and 39.4 ± 52.8 MET-h/week, respectively).

Analysis of the type of activities showed that the MET-h/week values did not differ between the groups studied for *household*/*caregiving*, *occupational activity*, *transportation* and *sports*/*exercise*. However, it was noticeable that higher energy expenditure (*p* ≤ 0.01) in women in the third trimester of pregnancy was observed for the activities related to *inactivity* (51.4 ± 28.87 MET-h/week) compared to those in the second trimester (42.7 ± 24.9 MET-h/week).


**Table 1.** Means (M), standard deviations (SD), medians, and 25th and 75th percentiles for the Pregnancy Physical Activity Questionnaire (PPAQ-PL) and intergroup comparisons (the second and third trimesters) using the Mann–Whitney U-test.

> MET-Metabolic Equivalent of Task; \* *p* ≤ 0.05; \*\* *p* ≤ 0.01.

The WHOQoL-Bref results indicated no differences in the self-rated quality of life of the women surveyed (Table 2). Pregnant women in both the second and third trimesters rated their quality of life in the *psychological domain* as the highest (16.48 ± 1.88 in the second trimester and 16.56 ± 1.64 in the third trimester), whereas the lowest ratings were recorded for the *environmental domain* (15.89 ± 1.96 and 15.78 ± 1.91, respectively).

The next stage of the statistical analysis focused on investigating whether there is a correlation between intensity and types of PA assessed using PPAQ-PL and domains of the QoL assessed using WHOQoL-Bref in women in the second (Table 3) and third (Table 4) trimesters of pregnancy.


**Table 2.** Medians, 25th and 75th percentiles, means (M) and standard deviations (SD) for the Quality of Life-Bref Questionnaire (WHOQoL-Bref) and intergroup comparisons (2nd and 3rd trimesters) using the Mann–Whitney U-test.

**Table 3.** Spearman's correlation coefficients between the Pregnancy Physical Activity questionnaire (PPAQ-PL) and Quality of Life-Bref Questionnaire (WHOQoL-Bref) in women in the second trimester of pregnancy.


MET-Metabolic Equivalent of Task; \* *p* ≤ 0.05. **Table 4.** Spearman's correlation coefficients between the Pregnancy Physical Activity questionnaire (PPAQ-PL) and Quality of Life-Bref Questionnaire (WHOQoL-Bref) in women in the third trimester of pregnancy.


MET-Metabolic Equivalent of Task; \* *p* ≤ 0.05.

There was a significant correlation in the group of women in the second trimester of pregnancy for *physical health domain* with intensity and the type of activities (Table 3). The women who rated their quality of life higher in this domain declared higher energy expenditures associated with *vigorous activity* (*R* = 0.159, *p* ≤ 0.05), as well as with *occupational activity* (*R* = 0.166; *p* ≤ 0.05) and *sport*/*exercise* activity (*R* = 0.187; *p* ≤ 0.05).

Furthermore, a negative correlation was found between *physical health domain* and *inactivity* (*R* = −0.151, *p* ≤ 0.05). This means that higher assessment of quality of life in this domain coincided with lower energy expenditure related to *inactivity*. Individual positive correlations were also documented between *social relationship domain* and *transportation activity* (*R* = 0.166, *p* ≤ 0.05) and between *environmental domain* and *sport*/*exercise activity* (*R* = 0.103, *p* ≤ 0.05).

In women in the third trimester, higher energy expenditures related to *sport*/*exercise activity* coincided with higher assessments of the *overall quality of life* (*R* = 0.149, *p* ≤ 0.05) and *general health* (*R* = 0.170, *p* ≤ 0.05). In the case of the *psychological domain* (*R* = 0.161, *p* ≤ 0.05) and *social relationship domain* (*R* = 0.188; *p* ≤ 0.05) of QoL, positive correlations occurred with energy expenditure related to *vigorous activity*. In contrast, high assessment of the *physical health domain* coincided with higher energy expenditure related to *occupational activity* (*R* = 0.174; *p* ≤ 0.05).
