School of Health Sciences, College of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa.
Int J Environ Res Public Health. 2024 May 31;21(6):717. doi: 10.3390/ijerph21060717.
Adolescents in resource-constrained environments face increasing sedentary lifestyles and obesity rates, necessitating effective interventions for promoting physical activity and combating non-communicable diseases. This study evaluates the impact of a 12 week Nyakaza Move-for-Health intervention on physical activity, anthropometry, cardiorespiratory fitness, and behaviour change among adolescents in KwaZulu-Natal, South Africa. One hundred twenty-eight adolescents participated, with assessments including self-reported physical activity, anthropometric indices, and cardiorespiratory fitness measures. The intervention significantly increased physical activity levels. The treatment group's mean score was 2.2 (0.4) at baseline and 2.6 (0.4) (F (14, 79) = 4.884, = <0.001, η2 = 0.156) at the endline. The body mass index decreased (mean = 22.4 (4.6) at baseline and 21.9 (4.2) at endline; = 0.025, partial eta squared = 0.025, η2 = 0.004). The intervention programme significantly affected the WHR (mean = 0.80 (0.10) at baseline and 0.76 (0.9) at endline; < 0.001, partial eta squared = 0.327, η2 = 0.100) and the predicted maximal oxygen uptake (VO max) for the treatment group (mean = 42.4 (8.7) at baseline and mean = 43.6 (8.7) at endline; < 0.711, partial eta squared = 0.017, η2 = 0.033). Focus group discussions indicated shifts in knowledge, attitudes, and motivation towards physical activity. Power analysis revealed strong observed power (PA: 0.983, BMI: 0.098, WHR: 0.887), indicating the robustness of the intervention's effects. These findings underscore the effectiveness of the intervention in improving physical health outcomes. It is recommended that longitudinal studies be conducted to assess the long-term sustainability and impact of such interventions on adolescents' health outcomes, thereby informing the development of comprehensive public health policies and programmes to promote physical activity and combat non-communicable diseases in similar settings.
在资源有限的环境中，青少年面临着日益增加的久坐生活方式和肥胖率，因此需要采取有效的干预措施来促进身体活动，防治非传染性疾病。本研究评估了为期 12 周的 Nyakaza Move-for-Health 干预措施对南非夸祖鲁-纳塔尔省青少年身体活动、人体测量学、心肺功能和行为改变的影响。共有 128 名青少年参与了研究，评估包括自我报告的身体活动、人体测量学指数和心肺功能测试。干预显著提高了身体活动水平。治疗组的平均得分为 2.2（0.4）在基线和 2.6（0.4）（F（14，79）= 4.884，= <0.001，η2 = 0.156）在终线。身体质量指数下降（平均= 22.4（4.6）在基线和 21.9（4.2）在终线；= 0.025，部分 eta 平方= 0.025，η2 = 0.004）。干预方案显著影响了 WHR（平均= 0.80（0.10）在基线和 0.76（0.9）在终线；< 0.001，部分 eta 平方= 0.327，η2 = 0.100）和治疗组的预测最大摄氧量（VO max）（平均= 42.4（8.7）在基线和平均= 43.6（8.7）在终线；< 0.711，部分 eta 平方= 0.017，η2 = 0.033）。焦点小组讨论表明，知识、态度和身体活动动机发生了转变。功效分析显示出较强的观察功效（PA：0.983，BMI：0.098，WHR：0.887），表明干预效果的稳健性。这些发现强调了干预措施在改善身体健康结果方面的有效性。建议进行纵向研究，以评估此类干预措施对青少年健康结果的长期可持续性和影响，从而为制定促进身体活动和防治非传染性疾病的综合公共卫生政策和方案提供信息。
