Three Sessions of Repeated Sprint Training in Normobaric Hypoxia With 48-Hour Interval Improves Repeated Sprint Performance Indices
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Relative Peak Power Output
研究概览
简要总结
The aim of the current study was to examine the effects of 3-session repeated sprint training performed in a normobaric hypoxic condition with 48-hour rest intervals on sprint performance indices, arterial oxygen saturation (SpO2) and rating of perceived exertion (RPE) scores. Twenty-four moderately-trained males participated in this study voluntarily basis. This study was conducted on single-blind placebo-controlled design. Participants were divided into three groups as follows; normobaric hypoxia (3420 m; HYP), normobaric normoxia (162 m; PLA) and control group (CON). HYP and PLA groups subjected to 3 repeated sprint training session (4 set x 5 x 5 s sprints with 30 s recovery and 5 min rest between the sets) in normobaric hypoxia or normoxia condition. Pre- and pos-test were conducted 72 hours before and after the training intervention period. All the training and testing sessions performed in cycle ergometer. There were no detected significant time and condition interaction in the variables; relative peak power output (PPO), mean power output (MPO), percentage of sprint decrement score (Sdec%) and RPE observed in the scope of pre- and post-test.
详细描述
This single-blind placebo-controlled designed study was approved by Ankara University Human Research Ethics Committee (2020/277) and conducted in accordance with the Declaration of Helsinki. The participants in normobaric hypoxia (HYP) and placebo (PLA) groups visited the laboratory six times and the control (CON) group visited three times. At the first visit of participants, the aim and the possible outcomes of the research was explained, the familiarization process for cycle ergometer and test/training protocol was performed, and the informed consent forms were obtained. The participants were divided randomly into three groups after the anthropometric measurements and baseline tests were completed so as part of the second visit. The groups were divided as follows; HYP group (n=9) which were exposed to normobaric hypoxia equal to 3420 m (FiO2: 13.5-13.6 %), PLA (n=7) that were exposed to normobaric normoxia equal to 162 m (FiO2: 20.9 %) through wearing the altitude generator mask, and the control group (CON; n=8) which was subjected to only pre and post-test. The determined hypoxic dose for HYP group was directly implemented (setting 9 was equal to 3420 m on used hypoxia generator), and no correction was made for the actual altitude (900 m, Golbasi, Ankara, Türkiye). The normobaric hypoxia and placebo condition was provided by Everest Summit II-Altitude Generator (Hypoxico Hypoxicator, New York, USA). At the 3rd-5th visits, HYP and PLA groups performed 3 repeated sprint training sessions under normobaric hypoxia or normoxia exposure with 48-hour intervals. And the participants visited the laboratory last time for post-test measurements. Each participant visited the laboratory for training sessions and test trials at the same time in the day. In the scope of pre and post-test repeated sprint indices, SpO2 and RPE data were collected. Pre-test and post-test were conducted 72 hours before and 72 hours after the training intervention period in normobaric normoxia condition. Including the testing days, the intervention period lasted 11 days in November 2022. All the experimental processes were conducted in Ankara University Performance Laboratory.
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 (Participant)
盲法说明
In this study, blinding was provided in practice by using the simulation device for the normoxia condition.
入排标准
- 年龄范围
- 18 Years 至 22 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •non-smokers,
- •male gender,
- •those who do not have any chronic disease,
- •do not use any medication,
- •do not any training or accommodate above 1500 m altitude within the past 3 months,
- •do not have any musculoskeletal injuries within the past 6 months and,
- •train at least 3 days in a week.
排除标准
- •Having a chronic or acute condition/disease during the intervention period
- •Occurrence of acute respiratory illness or musculoskeletal injury during the intervention period
- •Leaving the study voluntarily/on his own account
结局指标
主要结局
Relative Peak Power Output
时间窗: 11 days
Relative peak power output (as newton meter) produced during the repeated cycling sprint tests by the participant in the scope of pre and post tests were recorded and assessed via Lode Cycling Ergometer Software. The total intervention period was 11 days from pre to post test. The change evaluated from pre to post test.
Relative Mean Power Output
时间窗: 11 days
Relative mean power output (as newton meter) produced during the repeated cycling sprint tests by the participant in the scope of pre and post tests were recorded and assessed via Lode Cycling Ergometer Software. The total intervention period was 11 days from pre to post test. The change evaluated from pre to post test.
Percentage of Sprint Decrement Score
时间窗: 11 days
Percentage of sprint decrement score calculated via relative peak power output produced during the repeated cycling sprint tests by the each participant in the scope of pre and post tests. The used sprint decrement score formula was as the follows; "Sdec% = \[1 - (total power/ideal power)\] × 100". Total power refers to accumulated PPO over the number of sprints and ideal power is defines the achieved highest PPO over the repetitions. An increase in the obtained score means that the sprint performance decreases.The total intervention period was 11 days from pre to post test. The change evaluated from pre to post test.
次要结局
- Rate of Perceived Exertion(11 days)
- Arterial Oxygen Saturation(11 days)
研究者
Abdulkadir Birol
Assistant Professor
Trabzon University