问题库/省钱与花钱
想减肥,买个运动手环盯着步数有用吗
不是必须花的钱。471 名超重的人做同样的饮食和运动安排,戴手环的两年减了 3.5 公斤,不戴的反而减了 5.9 公斤。省下这两百到两千块,花在能长期坚持的吃和练上。
这里不保证什么
有心律不齐、需要监测心率血氧的人另说,那算医疗用途。体重掉得快、没刻意减也在瘦,先查病因,别只盯步数。
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不要指望手环/手表的运动量化帮你减重
超重的人做同样的饮食和运动安排,戴运动手环的人两年减了 3.5 公斤,不戴的人反而减了 5.9 公斤。想减重,设备不是必须花的钱。
- 先看自己有没有把吃和动记下来,这一步免费,设备替代不了
- 把买设备的钱先放着,用三个月看体重有没有动
- 真要买,先借朋友的戴一周,看那些数据有没有改变你做的事
坑这只是一项试验,用的还是十多年前戴在胳膊上的设备,推不成「所有可穿戴设备都没用」。
成本:设备 200 到 2000 元。另外每天还要分神去看那些数据。第 6 节 · 反面清单
出处
Jakicic JM et al. (2016). Effect of Wearable Technology Combined With a Lifestyle Intervention on Long-term Weight Loss: The IDEA Randomized Clinical Trial. JAMA. <https://doi.org/10.1001/jama.2016.12858>
不要指望吃早餐或 16:8 轻断食帮你控制体重,吃饭时间挑你能长期坚持的
流行说法是不吃早餐会让人午饭晚饭暴食,一天总量反而更多。试验里不是这样:不吃早餐的人一天少吃了两百多千卡,体重还略轻一点。16:8 和单纯少吃比,一年下来体重也没差别。长期不吃早餐的人心血管病多约一成七,但只是关联,总死亡率看不出差别。
- 先挑一个能长期坚持的吃饭时间,别挑最难的那个
- 把总量控制住,几点吃放在第二位,先记一周吃进去的东西
- 不吃早餐的,注意别在午饭晚饭补回来,看体重有没有动
坑那 17% 来自只记录、不分组的研究,吸烟久坐这些因素扣不干净;16:8 的好处也只在短期试验里看到过,争议没结。
成本:不花钱。省下的是每天跟吃饭时间较劲的那点心力。第 6 节 · 反面清单
出处
Sievert K, Hussain SM, Page MJ, 等 (2019). Effect of breakfast on weight and energy intake: systematic review and meta-analysis of randomised controlled trials. BMJ. <https://doi.org/10.1136/bmj.l42>;Lowe DA, Wu N, Rohdin-Bibby L, 等 (2020). Effects of Time-Restricted Eating on Weight Loss and Other Metabolic Parameters in Women and Men With Overweight and Obesity. JAMA Internal Medicine. <https://doi.org/10.1001/jamainternmed.2020.4153>;Liu D, Huang Y, Huang C, 等 (2022). Calorie Restriction with or without Time-Restricted Eating in Weight Loss. New England Journal of Medicine. <https://doi.org/10.1056/NEJMoa2114833>;Zhang H, Zhang S, Liu Y, 等 (2025). The association between skipping breakfast and cardiovascular disease: a meta analysis. Frontiers in Cardiovascular Medicine. <https://doi.org/10.3389/fcvm.2025.1565806>;Rong S, Snetselaar LG, Xu G, 等 (2019). Association of Skipping Breakfast With Cardiovascular and All-Cause Mortality. Journal of the American College of Cardiology. <https://doi.org/10.1016/j.jacc.2019.01.065>;Fernandes-Alves D, Teixeira GP, Guimarães KC, Crispim CA (2026). Systematic Review and Meta-analysis of Randomized Clinical Trials Comparing Time-Restricted Eating With and Without Caloric Restriction for Weight Loss. Nutrition Reviews. <https://doi.org/10.1093/nutrit/nuaf053>;Sun T, Zhang L, Lu Y, 等 (2024). Non-linear relationship between the first meal time of the day and gallstone incidence in American adults. Frontiers in Nutrition. <https://doi.org/10.3389/fnut.2024.1521707>;Liu T, Wang Y, Wang X, 等 (2023). Habitually Skipping Breakfast Is Associated with the Risk of Gastrointestinal Cancers: Evidence from the Kailuan Cohort Study. Journal of General Internal Medicine. <https://doi.org/10.1007/s11606-023-08094-7>;National Institute of Diabetes and Digestive and Kidney Diseases (2022). Symptoms & Causes of Peptic Ulcers (Stomach or Duodenal Ulcers)(「The most common causes of peptic ulcers are Helicobacter pylori (H. pylori) infection and nonsteroidal anti-inflammatory drugs (NSAIDs).」). <https://www.niddk.nih.gov/health-information/digestive-diseases/peptic-ulcers-stomach-ulcers/symptoms-causes>
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这条回答是给一个正在着急的人写的,不是法律意见或医嘱。 金额大、动到人身、或者已经进到程序里,去找律师、医生和办事窗口。