Development and Strategic Research of Practical Applications in Sports Nutrition
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 50
- 主要终点
- Questionnaire-based subjective assessment
研究概览
简要总结
This study evaluates the practical feasibility and potential effects of an 8-week dairy product intervention in physically active adults aged 18-39 years. Participants will consume a dairy product enriched with high protein, calcium, and vitamin D under real-life conditions. Assessments will be conducted before the intervention, after 4 weeks, and after 8 weeks, including subjective perception questionnaires, body composition analysis, and functional physical performance tests. The study aims to examine changes in physical status, functional capacity, and user experience during continuous product use.
详细描述
With increasing awareness of regular exercise and health promotion, sports nutrition products have become a common supplementation choice among physically active populations. In real-world settings, these products are typically consumed continuously as part of daily life. Evaluating changes in physical status, functional physical performance, and users' subjective perceptions during actual use therefore requires research designs that closely reflect everyday living conditions.
This study recruits physically active adults aged 18-39 years and conducts an 8-week intervention involving the consumption of a dairy product enriched with high protein, calcium, and vitamin D. A pre-, mid-, and post-intervention design is employed, integrating subjective perception questionnaires, body composition analysis, and functional physical performance assessments to evaluate changes in physical status, functional capacity, and subjective experiences throughout the intervention period. Through this multi-dimensional evaluation approach, the study aims to examine the practical feasibility and application value of the product in real-life settings and to provide evidence to support sports nutrition practice and future research.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 39 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Aged 18-39 years.
- •Have regular exercise habits, defined as exercising at least three times per week, with each session lasting no less than 30 minutes. Exercise intensity should reach a heart rate of approximately ≥130 beats/min or a perceived intensity characterized by noticeable breathlessness and sweating.
- •Preferably, at least one exercise session per week should include resistance training.
- •Participants must be able to consume dairy products and have no lactose intolerance.
排除标准
- •Individuals with lactose intolerance or an allergy to dairy products.
- •Individuals who are pregnant, planning to become pregnant, or breastfeeding.
- •Individuals with a smoking habit.
- •Individuals diagnosed by a physician with cardiovascular disease, hypertension, metabolic disease, asthma, or kidney disease.
- •Individuals with a body mass index (BMI) ≥
- •Individuals who have experienced limb or neuromuscular exercise-related injuries within the past 6 months that prevent them from engaging in regular exercise.
研究组 & 干预措施
Dairy intervention group
An 8-week high-protein, high-calcium, and vitamin D-enriched dairy intervention.
干预措施: Dairy intervention (Dietary Supplement)
结局指标
主要结局
Questionnaire-based subjective assessment
时间窗: The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.
Participants' subjective physical sensations, post-exercise fatigue, body image perceptions, and product use experience will be assessed using individual items from a self-administered questionnaire developed for this study. Questionnaire items may include Likert-scale items, categorical response options, and open-ended responses. Likert-scale items will be reported separately according to their original response scale, with the minimum and maximum values specified for each item. Categorical items will be reported as the number and percentage of participants selecting each response option. Open-ended responses will be summarized descriptively. No overall questionnaire total score will be calculated.
Handgrip Strength Test
时间窗: The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.
Participants performed the test in a standing position with their arms naturally hanging down. They held the handgrip dynamometer with one hand and applied maximal force continuously for at least 3 seconds. Each hand was tested three times, and the best value was recorded.
Push-Up Test
时间窗: The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.
Participants performed the push-up test on an exercise mat, with both hands placed shoulder-width apart to support the body. The fingers pointed forward, the elbows were fully extended, and the feet were approximately 10 cm apart. Male participants performed the test with support from the feet, whereas female participants performed the modified version with support from the knees. Participants were instructed to complete as many repetitions as possible while maintaining proper form. The test was terminated when the movement no longer met the required standard or could not be continued.
Curl-Up Test
时间窗: The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.
Participants lay supine on an exercise mat with both knees bent and feet flat on the floor. They performed curl-ups according to a fixed rhythm. Participants were instructed to complete as many repetitions as possible while maintaining proper form. When a participant failed to perform the movement correctly once, the examiner raised one hand and indicated the number "one." If the participant failed a second time, the examiner indicated the number "two." The test was terminated when the participant failed twice or completed 75 repetitions. If the participant was unable to maintain the required rhythm or perform the movement according to the standard criteria, the test was stopped.
Three-Minute Progressive Step-in-Place Test
时间窗: The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.
Participants performed step-in-place movements according to the instructions and raised their knees to the designated height. The test lasted for 3 minutes, with an initial cadence of 96 beats per minute, which was progressively increased each minute. During the test, heart rate was recorded using a heart rate monitor before exercise, during exercise, and during the post-exercise recovery period.
次要结局
- Body weight(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Body mass index(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Body fat percentage(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Fat mass(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Skeletal muscle mass(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Skeletal muscle percentage(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
- Waist-to-hip ratio(The testing time points are set as follows: before the intervention, after 4 weeks of intervention, and after 8 weeks of intervention.)
研究者
Yi-Ju Hsu
Professor
National Taiwan Sport University