Effects of Microdosed Versus Conventional Plyometric Training on Lower-Limb Explosive Power, Speed, and Agility in Adolescent Basketball Players: A Randomized Controlled Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Change in Countermovement Jump Height
研究概览
简要总结
This randomized controlled trial compared microdosed and conventional plyometric training in adolescent male basketball players. Forty participants aged 12-16 years were randomly assigned to either a microdosed training group or a conventional training group for 8 weeks. Both groups performed the same plyometric exercises and completed the same weekly training volume of 240 ground contacts. The microdosed group completed six sessions per week with 40 ground contacts per session, whereas the conventional group completed two sessions per week with 120 ground contacts per session. The study evaluated changes in jump performance, reactive strength, sprint performance, agility, and body composition.
The study was completed before registration on ClinicalTrials.gov and is being registered retrospectively for transparency.
详细描述
This study was an 8-week, assessor-blinded randomized controlled trial designed to compare the effects of microdosed and conventional plyometric training in adolescent male basketball players.
Forty male basketball players aged 12-16 years were randomly allocated in a 1:1 ratio to a microdosed training group (MT, n=20) or a conventional training group (CT, n=20). Both groups continued their regular basketball training and performed the same plyometric exercises, including ankle hops, hurdle jumps, and drop jumps.
The total weekly plyometric training volume was matched between groups. The MT group completed six sessions per week with 40 ground contacts per session, whereas the CT group completed two sessions per week with 120 ground contacts per session. Therefore, both groups completed 240 ground contacts per week and 1,920 ground contacts over the 8-week intervention. Exercise technique, hurdle height, box height, and recovery intervals were standardized between groups.
Outcomes were assessed before and after the intervention. These included body mass, body fat percentage, countermovement jump height and concentric peak power, squat jump height and concentric peak power, eccentric utilization ratio, drop jump height, reactive strength index, three-quarter-court sprint time, and hexagon test completion time.
This study was completed before registration on ClinicalTrials.gov. Therefore, this record represents a retrospective registration based on the completed study protocol and collected study data.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- Single (Outcomes Assessor)
盲法说明
Outcome assessors were blinded to group allocation.
入排标准
- 年龄范围
- 12 Years 至 16 Years（Child）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Male adolescent basketball players aged 12-16 years. Regular participation in organized basketball training. No lower-limb injury within the previous 3 months. No systematic plyometric training within the previous 6 months.
排除标准
- •Injury or illness that prevented continued participation in the study. Participation in additional structured lower-limb training during the intervention.
- •Failure to complete either the PRE or POST assessments.
研究组 & 干预措施
Microdosed Plyometric Training
Participants completed six plyometric training sessions per week for 8 weeks, with 40 ground contacts per session and 240 ground contacts per week. The training included ankle hops, hurdle jumps, and drop jumps, in addition to regular basketball training.
干预措施: Microdosed Plyometric Training (Other)
Conventional Plyometric Training
Participants completed two plyometric training sessions per week for 8 weeks, with 120 ground contacts per session and 240 ground contacts per week. The training included ankle hops, hurdle jumps, and drop jumps, in addition to regular basketball training.
干预措施: Conventional Plyometric Training (Other)
结局指标
主要结局
Change in Countermovement Jump Height
时间窗: Baseline and immediately after the 8-week intervention
Countermovement jump height was assessed using two portable three-dimensional force plates sampling at 1,000 Hz. Participants performed three valid maximal countermovement jumps with 60 seconds of rest between trials. The trial with the greatest jump height was retained for analysis. Jump height was recorded in centimeters (cm).
Change in Countermovement Jump Concentric Peak Power
时间窗: Baseline and immediately after the 8-week intervention
Countermovement jump concentric peak power was assessed using two portable three-dimensional force plates sampling at 1,000 Hz. Participants performed three valid maximal countermovement jumps with 60 seconds of rest between trials. Concentric peak power was recorded in watts (W).
Change in Squat Jump Height
时间窗: Baseline and immediately after the 8-week intervention
Squat jump height was assessed using two portable three-dimensional force plates sampling at 1,000 Hz. Participants started from a stationary squat position with approximately 90 degrees of knee flexion and jumped vertically without a preparatory countermovement. Three valid trials were completed with 60 seconds of rest, and the trial with the greatest jump height was retained. Jump height was recorded in centimeters (cm).
Change in Squat Jump Concentric Peak Power
时间窗: Baseline and immediately after the 8-week intervention
Squat jump concentric peak power was assessed using two portable three-dimensional force plates sampling at 1,000 Hz. Participants completed three valid squat jumps with 60 seconds of rest between trials. Concentric peak power was recorded in watts (W).
Change in Drop Jump Height
时间窗: Baseline and immediately after the 8-week intervention
Drop jump height was assessed using two portable three-dimensional force plates sampling at 1,000 Hz. Participants stepped from a 50-cm box, landed on the force plates, and immediately performed a maximal vertical rebound jump while attempting to minimize ground-contact time. Three valid trials were completed with 60 seconds of rest. Jump height was recorded in centimeters (cm).
次要结局
- Change in Reactive Strength Index(Baseline and immediately after the 8-week intervention)
- Change in Eccentric Utilization Ratio(Baseline and immediately after the 8-week intervention)
- Change in Three-Quarter-Court Sprint Time(Baseline and immediately after the 8-week intervention)
- Change in Hexagon Test Completion Time(Baseline and immediately after the 8-week intervention)
- Change in Body Mass(Baseline and immediately after the 8-week intervention)
- Change in Body Fat Percentage(Baseline and immediately after the 8-week intervention)
研究者
Chao Wang
Master's Student
Chongqing Normal University