Clinical Trial Details
— Status: Completed
Administrative data
| NCT number |
NCT02499809 |
| Other study ID # |
Tarntula 1 |
| Secondary ID |
|
| Status |
Completed |
| Phase |
N/A
|
| First received |
July 14, 2015 |
| Last updated |
June 12, 2017 |
| Start date |
August 2015 |
| Est. completion date |
December 2015 |
Study information
| Verified date |
June 2017 |
| Source |
Wingate Institute |
| Contact |
n/a |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Interventional
|
Clinical Trial Summary
High intensity exercise can lead to muscle damage, resulting in muscle soreness, swelling
and reduction in muscle strength. If the recovery is not sufficient or efficient it can
increase the risk for injury and decrease the ability of the athlete to perform repetitive
exercise and maintain overall performance.
There are a variety of recovery aids which are being used by athletes, such as: the use of
compression garments, massage, cold water immersion, sauna etc. Additional recovery strategy
currently growing in popularity is the application of vibration.
The evidences regarding the benefits of vibration therapy as a recovery aid are limited,
specifically in athlete. Therefore, the proposed study will examine the use of vibration
therapy as a recovery tool. The efficacy of this technique will be measure using functional
and field tests.
Description:
Introduction High intensity exercise can lead to muscle damage, resulting in muscle
soreness, swelling and reduction in muscle strength (Proske & Allen, 2005). If the recovery
is not sufficient or efficient it can increase the risk for injury and decrease the ability
of the athlete to perform repetitive exercise and maintain overall performance. Therefore,
the use of recovery strategies between practice sessions can be an important factor in the
training process, and will allow the athlete to make the most out of the training regime he
or she perform.
There are a variety of recovery aids which are being used by athletes, such as: the use of
compression garments, massage, cold water immersion, sauna etc. Additional recovery strategy
currently growing in popularity is the application of vibration (Rhea et al. 2009; Broadbent
et al. 2010). It has been suggested that the application of vibration could increase the
blood flow to the muscle, increase muscle temperature, increases metabolite removal rate and
accelerate muscle tissue remodeling. All these processes could reduce delayed onset muscle
soreness (DOMS) and accelerate muscle recovery (Rhea et al. 2009; Broadbent et al. 2010; Lau
et al. 2011).
Although DOMS are one of the symptoms of muscle damage, they don't necessarily reflect or
provide indication of the ability of the muscle to produce strength. That is, it is possible
that an athlete will feel well (with no associated pain) but the ability to produce force is
still low compare to baseline measurements.
The ability to produce force is an objective and important measure to quantify the recovery
status of an athlete after intense exertion (Warren et al. 1999). The efficacy of vibration
therapy for promoting recovery has been tested on a small number of studies with equivocal
results. For example, Barnes et al. (2012) tested 8 healthy males who completed 300
eccentric contractions of the quadriceps of one leg on an isokinetic dynamometer.
Immediately after exercise and 12 and 24 hours post-exercise, the subjects underwent either
vibration therapy or a control treatment - no use of any recovery technique. The vibration
therapy included 5 sets of 1min vibration at 26 Hz, with 6 mm peak-to-peak displacement.
After two weeks after the initial trial, the subjects completed the second trial using the
contralateral leg and other treatment. The study's results revealed that the use of
vibration therapy reduced muscle peak force and average peak force 24 hours after the
eccentric exercise compared to the control group. Another study tested the use of vibration
therapy on muscle recovery and strength. This study found that the recovery of elbow flexor
peak isometric torque was unaffected by vibration in untrained participants (Lau et al.
2010). This was further supported by Fuller et al. (2014), who found the use of vibration
therapy didn't have an additional contribution to recovery after intense exercise compared
to stretching or massage.
The evidences regarding the benefits of vibration therapy as a recovery aid are limited.
From the paucity of studies in this area it is suggested that there are no additional
benefits for using vibration therapy. Yet, the use of different vibration techniques is
currently quite popular among athletes and the several studies performed until today were
done on non-athlete populations. Furthermore, these studies haven't tested functional
variables such as the ability to produce power and performed a repeated performance.
Performing a repeated exercise is similar to situations occasionally occur during ball
games. Therefore, the proposed study will examine the use of vibration therapy as a recovery
tool. The efficacy of this technique will be measure using functional and field tests.
Study purpose The purpose of the proposed study is to examine the effect of vibration
therapy as a recovery tool on the ability to perform repeated exertion.
Method The study and its procedures will receive ethic approval by the Helsinki board at
Hillel Yaffe Medical Center, Hadera, Israel. The proposed study sample will include 30
novice athletes (18-35 yrs.), who will be recruited to participate in this study.
Inclusion criteria for all groups: (a) participation in physical activity up to three hours
per week presently and in the previous year, (b) healthy individuals.
Exclusion criteria for all groups: (a) chronic diseases (hypertension, diabetes, etc.) (b)
chronic/frequent use of medications, (c) orthopedic or neurologic injury or disorder.
Exclusion criteria from the study: development of associated muscle or skeletal pain.
Study protocol The participants will arrive at the Ribstein Center for Sports Medicine and
Research at the Wingate Institute on two different occasions, 7 days apart.
First visit - a gradual stress test will be performed until exhaustion. Immediately at the
end of the test a ten minute recovery period will take place, in which either recovery
methods will be used (passive and active or vibration technique). Immediately following the
recovery period the participants will perform two functional tests to examine their muscle
power and endurance. The 1st test will be countermovement jump (3 jumps will be performed
with 15sec rest in between). The 2nd test will be 30sec jump test (continuous jumps). Two
minutes resting period will be taken between the tests. The tests will be performed using
the Optojump Next measuring system (Optojump, Microgate, Italy).
The recovery methods are:
1. Active and passive: 3min slow walking (4 km/h), 2min standing, 5min slow walking (4
km/h).
2. Vibration therapy: 3min slow walking (4 km/h), 2min standing, 5min vibration therapy
with special vibration machine designed for the lower extremities.
At the end of the exercise a peripheral blood sample will be taken from the finger in order
to measure blood lactate levels. Additional five samples will be taken in 2min intervals
until the end of the recovery period (total of 10min).
Technical information of the vibration machine- vibration frequency between 1-10 hertz,
amplitude: 30mm.
Second visit - a gradual stress test will be performed until exhaustion. Immediately at the
end of the test a ten minute recovery period will take place, in which the other recovery
method will be used (passive and active or vibration technique). Afterwards the two
functional tests will be performed.
** The order of the recovery methods will be assigned randomly between the participants.
First visit protocol:
1. Explanation and consent form sign
2. Filling medical questionnaire
3. Medical interview and examination by a sport's physician
4. Anthropometric measures: height, weight, percentage body fat
5. Stress test - including ECG and blood pressure monitoring
6. Recovery - 10min - use of different recovery mode
7. Countermovement jumps test and 30sec jump test Second visit protocol: (7 days apart)
1. Stress test 2. Recovery - 10min - using the other recovery mode not being used at the
first visit 3. Countermovement jumps test and 30sec jump test
Measures to be taken during the study:
1. Lactate levels
2. Heart rate (will be monitor continuously during the exercise and during the recovery
period)
3. Rate of perceived exertion - subjective evaluation of the difficulty level of the
exercise (during the exercise, at the end and after the jumps' tests)
4. Jumps' height during the test, consistency and fatigue index Statistical analysis
Paired t-tests will be performed in order to evaluate the effects of the recovery modes
on muscle fatigue index and muscle performance measures (power, jump height, etc.)
