College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Am J Hum Biol. 2018 Jan;30(1). doi: 10.1002/ajhb.23056. Epub 2017 Sep 13.
Emerging adulthood, a potential critical period, is an understudied period of fat mass accrual. The aim of this study was to describe patterns of fat mass accrual, and weight status, from adolescence, through emerging adulthood, into young adulthood.
One-hundred-eighteen participants (59 male) were measured repeatedly for 20 years. Annual measures of height, weight, and body composition (DXA) were taken. Calculated measures included: peak height velocity (PHV), biological age (BA; years from PHV), body mass index (BMI), and percent total body fat (%TBF). Weight status groupings (normal NW, and overweight/obese OWO) were created using age and sex specific BMI and %TBF cut-offs. Analysis included t-tests and logistic regression.
BMI and %TBF increased significantly until 8 years post PHV (P < .05), plateaued for 7 years (P > .05), and then began increasing again (P < .05). At PHV, 9% of males and 14% of females were OWO rising to 65% and 32% respectively 15 years post PHV. OWO status at PHV did not predict OWO status in early adulthood (P > .05).
During emerging adulthood, the prevalence of OWO increased. Being NW at PHV was not protective against being overweight in young adulthood. Emerging adulthood appears to be a potential critical period for fat accrual and warrants further attention.
成年初显期是一个潜在的关键时期，在此期间人体脂肪大量增加。本研究旨在描述从青春期到成年初显期再到成年早期的脂肪量积累和体重状况模式。
118 名参与者（59 名男性）接受了 20 年的重复测量。每年测量身高、体重和身体成分（DXA）。计算的指标包括：峰值身高速度（PHV）、生物年龄（BA；从 PHV 到现在的年数）、体重指数（BMI）和总身体脂肪百分比（%TBF）。体重状况分组（正常 NW 和超重/肥胖 OWO）是使用年龄和性别特异性 BMI 和 %TBF 切点创建的。分析包括 t 检验和逻辑回归。
BMI 和 %TBF 直到 PHV 后 8 年显著增加（P<0.05），然后稳定 7 年（P>0.05），然后再次开始增加（P<0.05）。在 PHV 时，9%的男性和 14%的女性为 OWO，到 PHV 后 15 年，这一比例分别上升至 65%和 32%。PHV 时的 OWO 状态并不能预测成年早期的 OWO 状态（P>0.05）。
在成年初显期，OWO 的患病率增加。PHV 时为 NW 并不能防止成年早期超重。成年初显期似乎是脂肪积累的一个潜在关键时期，值得进一步关注。
