Relationship between 24-hour movement behavior and physical fitness among pupils
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摘要:
目的 使用成分数据分析方法探究小学生24 h活动行为与身体素质之间的关系,为促进儿童青少年身体活动(PA)水平、提高身体素质提供理论依据。 方法 采用随机整群抽样方法选取太原市迎泽区第二实验小学120名四、五年级的学生为研究对象,采用《国家体育锻炼标准工作指导手册》指标和20 m折返跑评价小学生身体素质,采用加速度计结合问卷调查24 h活动行为,通过成分多元线性回归分析各行为与各体质指标的关系,探讨成分等时替代的效应。 结果 女生1 min仰卧起坐成绩[(24.79±7.77)个]低于男生[(28.21±6.52)个],坐位体前屈成绩高于男生[9.00(5.00,14.00), 5.20(1.00,9.75)cm](t/Z值分别为2.60,-3.15,P值均 < 0.05)。男生呈现较高的低强度身体活动(LPA)、中高强度身体活动(MVPA)和较低的静坐行为(SB),女生则为较低的LPA、MVPA和较高的SB。小学生MVPA与30 s跳绳、20 m折返跑成绩呈正相关(β值分别为13.19,7.90,P值均 < 0.05)。睡眠(SLP)、SB、LPA与体质指标关联均无统计学意义。将10 min MVPA重新分配给SB、SLP时,30 s跳绳和20 m折返跑成绩分别上升2.25,2.28个和1.28,1.34次,反向替代则显著下降(P值均 < 0.05)。MVPA替代LPA时,20 m折返跑成绩上升1.46次,反向替代则显著下降(P值均 < 0.05)。 结论 MVPA与小学生速度、耐力素质呈正相关,24 h活动行为模式和身体素质存在性别差异。应鼓励儿童特别是女生提高运动意识,增加PA尤其是MVPA。 Abstract:Objective To examine the relationship between 24-hour movement behavior and physical fitness of pupils by using compositional analyses, so as to provide a theoretical basis for physical activity promotion and physical fitness improvement. Methods By random cluster sampling method, 120 students of grade 4 and 5 from the Second Experimental Primary School of Yingze District of Taiyuan were selected. Physical fitness was evaluated by the indicators of the Protocol of National Physical Training Standard and 20-meter shuttle run. The movement behavior was measured by accelerometer. The relationship between each behavior and physical fitness was analysed by component multiple linear regression, and the effect of replacement of components on physical fitness was discussed. Results Girls' 1-minute sit-ups were lower than boys(24.79±7.77, 28.21±6.52), and sitting forward flexion was higher than boys[9.00(5.00, 14.00), 5.20(1.00, 9.75)cm](t/Z=2.60, -3.15, P < 0.05). Boys showed higher light physical activity(LPA), moderate-to-vigorous physical activity(MVPA) and lower sedentary behavior(SB), while girls showed lower LPA, MVPA and higher SB. MVPA was positively correlated with the performance of 30-second rope skipping and 20-meter shuttle run (β=13.19, 7.90, P < 0.05). Sleep(SLP), SB, and LPA were not significantly correlated with physical fitness. After re-allocating 10-min MVPA to SB and SLP, the performance of 30-second rope skipping and 20-meter shuttle run increased by 2.25, 2.28 and 1.28, 1.34 times, respectively, while significantly decreased after reverse reallocation (P < 0.05). MVPA replaced LPA, the 20-meter shuttle run performance increased 1.46 times, while decreased significantly in reverses (P < 0.05). Conclusion MVPA is positively correlated with the speed and endurance of pupils. There are gender differences in movement behavior patterns and physical fitness. Children, especially girls, should be encouraged to raise exercise awareness and increase PA, especially MVPA. -
Key words:
- Motor activity /
- Physical fitness /
- Compositional data analysis /
- Isotemporal substitution /
- Students
1) 利益冲突声明 所有作者声明无利益冲突。 -
表 1 不同性别小学生身体形态和身体素质指标比较(x ±s)
Table 1. Comparison of body shape and physical fitness of pupils among primary students of different genders(x ±s)
性别 人数 身高/cm 体重/kg BMI/(kg·m-2) 30 s跳绳/个 20 m折返跑/次 1 min仰卧起坐/个 十字象限跳/s 坐位体前屈/cm* 男 57 145.64±6.71 40.15±9.92 18.74±3.52 53.19±18.61 22.07±11.22 28.21±6.52 34.87±8.71 5.20(1.00, 9.75) 女 63 148.51±7.35 39.57±10.78 17.73±3.59 53.25±14.34 20.51±8.87 24.79±7.77 36.22±10.27 9.00(5.00, 14.00) t/Z值 -2.23 0.31 1.55 -0.02 0.85 2.60 -0.78 -3.15 P值 0.03 0.80 0.12 0.98 0.40 0.01 0.44 < 0.01 注:*表示采用M(P25, P75)描述。 表 2 不同性别小学生24 h活动行为时间几何均值/min
Table 2. The geometric mean values of the 24-hour movement behavior among primary students of different genders/min
性别 人数 SB LPA MVPA SLP 男 57 570.10(39.59) 277.34(19.26) 56.74(3.94) 535.82(37.21) 女 63 624.96(43.40) 237.74(16.51) 41.76(2.90) 535.54(37.19) 合计 120 599.04(41.60) 256.18(17.79) 48.38(3.36) 536.40(37.25) 注:( )内数字为构成比/%。 表 3 小学生24 h活动行为时间与身体素质指标的关联(n=120)
Table 3. The association between 24-hour movement behavior and physical fitness among primary students(n=120)
变量 R2值 SLP MVPA SB LPA β值 Pr(>|t|) β值 Pr(>|t|) β值 Pr(>|t|) β值 Pr(>|t|) 30 s跳绳 0.13 -8.13 0.24 13.19* 0.02 -7.00 0.33 1.94 0.81 20 m折返跑 0.16 -3.15 0.44 7.90* 0.02 0.37 0.93 -5.12 0.28 1 min仰卧起坐 0.07 -4.29 0.18 -0.41 0.88 -1.19 0.72 5.89 0.11 十字象限跳 -0.04 3.58 0.41 -2.11 0.57 -1.68 0.71 0.21 0.97 坐位体前屈 0.05 -0.96 0.74 2.10 0.39 -1.61 0.59 0.47 0.89 注:*P < 0.05;Pr(>|t|)相当于P值,通过R语言算出。 表 4 24 h活动行为10 min“一对一”等时替代后小学生身体素质成绩变化情况(差值,n=120)
Table 4. Changes in physical fitness scores after "one-to-one" compositional substitution of 24-hour movement behavior for 10 min among primary students(d, n=120)
活动行为 30 s跳绳/个 20 m折返跑/次 SB LPA MVPA SLP SB LPA MVPA SLP SB — 0.17 2.25* -0.03 — -0.18 1.28* -0.06 LPA -0.17 — 2.08 -0.20 0.18 — 1.46* 0.13 MVPA -2.75* -2.58 — -2.78* -1.58* -1.76* — -1.64* SLP 0.03 0.20 2.28* — 0.06 -0.12 1.34* — 活动行为 1 min仰卧起坐/个 十字象限跳/s 坐位体前屈/cm SB LPA MVPA SLP SB LPA MVPA SLP SB LPA MVPA SLP SB — 0.21 -0.05 -0.05 — 0.03 -0.32 0.08 — 0.04 0.37 0.01 LPA -0.22 — -0.27 -0.27 -0.03 — -0.35 0.05 -0.04 — 0.33 -0.03 MVPA 0.06 0.28 — 0.01 0.40 0.43 — 0.48 -0.44 -0.41 — -0.44 SLP 0.05 0.27 0.00 — -0.08 -0.05 -0.40 — -0.01 0.03 0.36 — 注:列中的活动行为时间分配至行中的活动行为;*P < 0.05。 表 5 成对行为之间“一对一”定量替代小学生30 s跳绳和20 m折返跑成绩的效应(差值,n=120)
Table 5. The effect of "one-to-one" quantitative substitution of 30-second rope skipping and 20-meter shuttle run among primary students between component behavior(d, n=120)
替代时间/min 活动行为 30 s跳绳/个 20 m折返跑/次 SB+Δ LPA+Δ MVPA+Δ SLP+Δ SB+Δ LPA+Δ MVPA+Δ SLP+Δ 2 SB-Δ — 0.03 0.48* -0.01 — -0.04 0.28* -0.01 LPA-Δ -0.03 — 0.45 -0.04 0.04 — 0.31* 0.02 MVPA-Δ -0.50* -0.47 — -0.51* -0.29* -0.32* — -0.30* SLP-Δ 0.01 0.04 0.49* — 0.01 -0.02 0.29* — 4 SB-Δ — 0.07 0.95* -0.01 — -0.07 0.54* -0.02 LPA-Δ -0.07 — 0.88 -0.08 0.07 — 0.61* 0.05 MVPA-Δ -1.03* -0.96 — -1.04* -0.59* -0.66* — -0.61* SLP-Δ 0.01 0.08 0.96* — 0.02 -0.05 0.56* — 6 SB-Δ — 0.10 1.40* -0.02 — -0.11 0.80* -0.03 LPA-Δ -0.10 — 1.30 -0.12 0.11 — 0.91* 0.07 MVPA-Δ -1.57* -1.48 — -1.59* -0.90* -1.01* — -0.94* SLP-Δ 0.02 0.12 1.42* — 0.03 -0.07 0.83* — 8 SB-Δ — 0.13 1.83* -0.02 — -0.14 1.04* -0.04 LPA-Δ -0.13 — 1.70 -0.16 0.15 — 1.19* 0.10 MVPA-Δ -2.15* -2.02 — -2.17* -1.23* -1.37* — -1.28* SLP-Δ 0.03 0.16 1.86* — 0.05 -0.10 1.09* — 10 SB-Δ — 0.17 2.25* -0.03 — -0.18 1.28* -0.06 LPA-Δ -0.17 — 2.08 -0.20 0.18 — 1.46* 0.13 MVPA-Δ -2.75* -2.58 — -2.78* -1.58* -1.76* — -1.64* SLP-Δ 0.03 0.20 2.28* — 0.06 -0.12 1.34* — 注: +Δ表示替代变量,-Δ表示被替代变量; *P < 0.05。 -
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