Hesketh Kathryn R, Wen Fang, Herring Amy H, Siega-Riz Anna Maria, Evenson Kelly R
Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA; MRC Epidemiology Unit, University of Cambridge, Cambridge, UK.
Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
Prev Med. 2024 May;182:107948. doi: 10.1016/j.ypmed.2024.107948. Epub 2024 Apr 5.
To explore whether a mismatch between absolute physical activity intensity (PAI) and relative self-reported PAI exists during pregnancy and postpartum.
Women from the PIN3/Postpartum study completed physical activity questionnaires during pregnancy (n = 770; Trimester 2: T2, Trimester 3: T3) and postpartum (n = 181; 3 months: PP3, 12 months PP12) (2001-2005). Activities women engaged in were assigned Metabolic Equivalent (MET) values for absolute intensity; women self-reported perceived exertion (using the Borg scale) for each activity to provide relative intensity. Hierarchical regression models were used to determine whether a mismatch between absolute and relative PAI (for moderate or vigorous physical activity (MPA; VPA)) differed during pregnancy and postpartum. Models were adjusted for socio-demographic factors.
Women commonly overestimated the amount of MPA and VPA they engaged in [T2 MPA mean 60.5 min/week (49.1, 72.0), VPA 3.7 (-1.4, 8.8); T3: MPA 47.7 (38.9, 56.4), 2.9 (-1.7, 7.4); PP3: MPA 69.5 (43.9, 95.1), VPA 15.8 (1.8, 29.7); PP12: MPA 42.20 (26.8, 57.6), VPA 2.75 (-7.8, 12.9)]. Women overestimated both MPA and VPA to a lesser extent at T3 compared to T2 (MPA: β for difference:-12.6 [95%CI: -26.0, -0.9]; VPA: -0.9 [-6.4, 4.6]). Women continued to overestimate their MPA at PP3 and PP12.
Compared to absolute PAI, perceived PAI was greater for MPA compared to VPA and differences persisted from pregnancy through postpartum. Future research should focus on how perceptions relate to women's actual physiological capacity and whether this mismatch influences the amount of physical activity women engage in during the transition to motherhood.
探讨孕期和产后绝对体力活动强度（PAI）与自我报告的相对PAI之间是否存在不匹配。
PIN3/产后研究中的女性在孕期（n = 770；孕中期：T2，孕晚期：T3）和产后（n = 181；3个月：PP3，12个月：PP12）（2001 - 2005年）完成体力活动问卷。女性从事的活动被赋予代谢当量（MET）值以确定绝对强度；女性对每项活动自我报告主观用力程度（使用Borg量表）以提供相对强度。采用分层回归模型确定孕期和产后绝对PAI与相对PAI（针对中等或剧烈体力活动（MPA；VPA））之间的不匹配是否存在差异。模型针对社会人口学因素进行了调整。
女性通常高估了她们进行的MPA和VPA的量 [T2期MPA平均每周60.5分钟（49.1，72.0），VPA 3.7分钟（-1.4，8.8）；T3期：MPA 47.7分钟（38.9，56.4），2.9分钟（-1.7，7.4）；PP3期：MPA 69.5分钟（43.9，95.1），VPA 15.8分钟（1.8，29.7）；PP12期：MPA 42.20分钟（26.8，57.6），VPA 2.75分钟（-7.8，12.9）]。与T2期相比，女性在T3期对MPA和VPA的高估程度均较小（MPA：差异β值：-12.6 [95%置信区间：-26.0，-0.9]；VPA：-0.9 [-6.4，4.6]）。女性在PP3期和PP12期继续高估她们的MPA。
与绝对PAI相比，MPA的主观PAI高于VPA，且从孕期到产后这种差异持续存在。未来的研究应关注认知与女性实际生理能力之间的关系，以及这种不匹配是否会影响女性在向母亲角色转变过程中的体力活动量。
