Speed-based and Mechanical Work Considered HIIT for Football Referees

Study Overview
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Brief Summary
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Majority of the existing studies on the high intensity training of referees are heart rate-based prescription. It is probably the most commonly measured physiological marker used to control or measure exercise intensity in the field.Indeed, speed-based intensity training is more acute than heart rate-based training on the intensity of physical work performed above v/pVO2max. This study the setting of exercise intensity reference the ending velocity of the 30-15 intermittent fitness test.

Detailed Description
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This study was carried out during the 10 weeks of before the seminar which conducted before the season. The assessments were carried out pre and post training intervention in the before and after week of the intervention, it includes 30-15 intermittent fitness test(VIFT),dynamic Yo-Yo intermittent recovery test, 40m repeat speed ability test, change direction test and cooper test.The experimental group(EG) take 10 weeks Speed-based (VIFT) HIIT protocol performed on each Wednesday and Saturday, 60 min for each session. One EG with mechanical work combined in the HIIT exercises, and another EG is not. The control group during the study performed on the same occasion heart rate-based HIIT. The TL was assessed using the 0-10-point rating perceived exertion (RPE) scale according to the procedures. With the aim to obtain more detailed information especially the muscle strain, during each occasion (i.e., training session or match) the referees should provide differentiated RPE (dRPE) for respiratory (RPEres) and leg muscle (RPEmus) exertion perception.

Official Title
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Effects of Speed-based and Mechanical Work Considered HIIT on Physical and Physiological Performance of Chinese Elite Female Referees in Fitness Tests

Conditions
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Physical Fitness

Intervention / Treatment
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* Behavioral: Heart rate based HIIT
* Behavioral: VIFT speed-based HIIT with mechanical work


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: the female referees who register as reserve national degree and above for 2022 and 2023. Exclusion Criteria: Injured Any reason can not complete all the required training sessions.

Ages Eligible for Study
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Minimum Age: 23 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Factorial Assignment
Interventional Model Description: In this experiment, the experimental groups conduct the speed-based HIIT with mechanical work. In contrast, the control group take heart rate based HIIT.
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Heart rate-based HIIT<br>12 weeks heart-rate based HIIT intervention. | Behavioral: Heart rate based HIIT<br>* Week1,90% HRmax long duration HIIT + 90% HRmax long duration HIIT. Week2,90% HRmax long duration HIIT + 90% long duration HRmax HIIT. Week3,90% HRmax long duration HIIT + 90% HRmax long duration HIIT. Week4,90% HRmax long duration HIIT + 90% HRmax long duration HIIT. Week5,90% HRmax short duration HIIT + 90～95% HRmax long duration HIIT. Week6,90% HRmax short duration HIIT + 90～95% HRmax long duration HIIT. Week7,90% HRmax short duration HIIT + 90～95% HRmax long duration HIIT. Week8,90% HRmax short duration HIIT + 90～95% HRmax long duration HIIT. Week9,90～95% HRmax short duration HIIT + 90～95% HRmax short duration HIIT. Week10,90～95% HRmax short duration HIIT + 90～95% HRmax short duration HIIT. Week11,90～95% HRmax short duration HIIT + 90～95% HRmax short duration HIIT. Week12,90～95% HRmax short duration HIIT + 90～95% HRmax short duration HIIT.<br>|
| Experimental: VIFT speed-based HIIT with mechanical work<br>12 weeks VIFT speed-based HIIT with mechanical work. | Behavioral: VIFT speed-based HIIT with mechanical work<br>* Week1,Wednesday 65% VIFT HIIT, saturday 65% VIFT HIIT. Week2,Wednesday 65% VIFT HIIT, saturday 65% VIFT HIIT. Week3,Wednesday 67.5% VIFT HIIT, saturday 67.5% VIFT HIIT. Week4,Wednesday 67.5% VIFT HIIT, saturday 67.5% VIFT HIIT. Week5,Wednesday 70% VIFT HIIT, saturday 90% VIFT HIIT. Week6,Wednesday 70% VIFT HIIT, saturday 90% VIFT HIIT. Week7,Wednesday 72.5% VIFT HIIT, saturday 92.5% VIFT HIIT. Week8,Wednesday 72.5% VIFT HIIT, saturday 92.5% VIFT HIIT. Week9,Wednesday 92.5% VIFT HIIT, saturday 100% VIFT HIIT. Week10,Wednesday 92.5% VIFT HIIT, saturday 100% VIFT HIIT. Week11,Wednesday 95% VIFT HIIT, saturday 105% VIFT HIIT. Week12,Wednesday 95% VIFT HIIT, saturday 105% VIFT HIIT.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Physical performance in fitness tests | Distance covered during dynamic yo-yo test | 3 days before the intervention | 
| Physical performance in fitness tests | The timing consume during the 40m repeat speed ability test | 3 days before the intervention, just 7min before the dynamic yo-yo test | 
| Physical performance in fitness tests | The timing consume during the change of direction test | 3 days before the intervention, just 5min before the 40m repeat speed test | 
| Physiological performance in the fitness tests | The HRmax and HRmean and lactic acid concentration during dynamic yo-yo test | 3days before the intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Physical performance in fitness tests | Distance covered during dynamic yo-yo test, evaluate the participants' ability to repeatedly perform intense exercise. | 3 days after the 12 weeks intervention | 
| Physical performance in fitness tests | The timing consume during the 40m repeat speed ability test, evaluate the participants' repeat speed ability. | 3 days after the 12 weeks intervention, 7min before the dynamic yo-yo test | 
| Physical performance in fitness tests | The timing consume during the change of direction test, evaluate the participants' change of direction ability. | 3 days after the 12 weeks intervention, 5min before the 40m repeat speed test | 
| Physiological performance in the fitness tests | The HRmax and HRmean and lactic acid concentration in dynamic yo-yo test | 3 days after the 12 weeks intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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high speed interval running, mechanical work