Clinical Benefits of a Multimodal Physiotherapy Programme in Fighter Pilots With Flight-related Neck Pain
- Conditions
- Neck Pain
- Interventions
- Other: Cervical supervised exercises with laser-guided feedback (ELGF)Other: Interferential current electro massage (ICE)
- Registration Number
- NCT05541848
- Lead Sponsor
- Universidad de Extremadura
- Brief Summary
The aim of this study was to analyse the immediate effects of a 4-week multimodal physiotherapy program which combines cervical supervised exercises with laser-guided feedback (ELGF) and interferential current electro massage (ICE) in fighter pilots with flight-related neck pain.
- Detailed Description
Flight-related neck pain constitutes a clinical entity related to the performance and flight safety of fighter pilots. The aim of this study was to analyse the effectiveness of a multimodal physiotherapy program which combines supervised Exercise with Laser-Guided Feedback (ELGF) and Interferential Current Electro-Massage (ICE) in fighter pilots with flight-related neck pain.
31 pilots were randomly allocated into two groups (Experimental Group n=14; Control Group n = 17). The intervention consisted of 8 sessions (twice a week) for 4 weeks. As primary outcome measures the following variables were measured: perceived pain intensity (Numeric Pain Rating Scale) and neck disability (Neck Disability Index). The secondary outcome measures were: cervical range of movement (CRoM), joint position sense error (JPSE) and pressure pain threshold (PPT).
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 31
- Flight pilots (male and female) who, at the time of the assessment, were an instructor or student attached to the 23th Wing of Talavera Air Base, Spanish Air Force (SAF), Badajoz.
- Flight pilots diagnosed with flight-related neck pain according to the International Classification proposed by an expert panel of the North Atlantic Treaty Organisation (NATO).
- A minimum perceived pain of 3/10 on the Visual Analogue Scale (VAS) in the early-morning assessment.
- Scores of ≥5 points on the Neck Disability Index (NDI), and a cervical-repositioning error of ≥4.5°.
- Cervical pain with radiation to the upper limbs and/or radiculopathy.
- Cervical spine surgery with or without the presence of a metal implant.
- Having received physiotherapy or any other routine medical care six weeks prior to data collection.
- Being involved in ongoing medical-legal conflicts.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- CROSSOVER
- Arm && Interventions
Group Intervention Description Experimental group Cervical supervised exercises with laser-guided feedback (ELGF) Participants in the experimental group will follow a supervised ELGF program. Subsequently, they will receive an intervention based on manual therapy combined with electrical stimulation called electro-massage. Experimental group Interferential current electro massage (ICE) Participants in the experimental group will follow a supervised ELGF program. Subsequently, they will receive an intervention based on manual therapy combined with electrical stimulation called electro-massage.
- Primary Outcome Measures
Name Time Method Numeric Pain Rating Scale (NPRS) 4 weeks. Numeric Pain Rating Scale (NPRS) is a 11-point numeric rating scale, where 0 denotes "no pain" and 10 denotes "the maximum bearable pain". The minimum clinically important difference (MCID) for this tool has been established at 1.5 points and the minimum detectable change (MDC) at 2.6 points, in individuals with neck pain. The NPRS is a valid scale with moderate test-retest reliability in this population (Intraclass Coefficient Correlation (ICC): 0.76, 95% CI 0.58 to 0.93).
Cervical Joint Position Sense Error (JPSE) 4 weeks. This test consists of a visual measurement of the error in moving the head to the initial neutral position after active cervical rotation.
- Secondary Outcome Measures
Name Time Method Max_HR 4 weeks. Maximum heart rate variability.
Standard Deviation 1 (SD1) 4 weeks. It indicates the sensitivity of short-term variability in HRV non-linear spectrum. It is considered an indicator of parasympathetic activity.
Cervical Range of Motion (CRoM) 4 weeks. For the evaluation of CROM, a conventional EnrafNonius® two-branch goniometer was used. Subjects were placed in a seated position on a stool, with a neutral neck and head position. The range of active cervical mobility presented by the patients was measured in reference to the three planes of the space. In the sagittal plane, the degrees of mobility to flexion and extension were measured, in the frontal plane the right and left inclinations, and in the transverse plane both rotations.
Min_HR 4 weeks. Minimum heart rate variability.
Kinesophobia 4 weeks. The Spanish version of the TSK-11 was used to measure fear of movement. Higher scores indicate greater fear-avoidance behaviors. The TSK-11 has demonstrated acceptable internal consistency and validity.
Sympathetic/parasympathetic ratio (S/PS) 4 weeks. S/PS is expressed as the quotient of SS and SD1, and it is considered to reflect autonomic balance - that is, the relationship between sympathetic and parasympathetic activity
Stress Score 4 weeks. It is an index to facilitate physiological interpretation of Poincaré plot. It is expressed as the inverse of the SD2 diameter multiplied by 1000 and is considered directly proportional to the sympathetic activity in the sinus node.
Mean_HR 4 weeks. It corresponds to the interval between two beats (R peaks on the ECG).
Pressure Pain Threshold (PPT) 4 weeks. A mechanical pressure Fisher algometer (Force Dial model FDK 40) with a 1 cm² area contact head was used to measure the pressure pain threshold. The reliability of pressure algometry has been found to be high \[intraclass correlation coefficient = 0.91 (95% confidence interval, 0.82-0.97)\]. With the participant in supine, the pressure pain threshold of the the myofascial trigger point nº2 of the upper trapezius muscle according to Travell and Simons and the central trigger point of the sternocleidomastoid muscle was bilaterally evaluated. Also, in sitting position the pressure pain threshold of the myofascial trigger point of the scapula elevator muscle was bilaterally evaluated. The minimal clinically important difference (MCDI) is 1.2 Kg/cm2.
Low Frequency Power (LF) 4 weeks. Situated between 0.04 and 0.15 Hz. In long-term recordings it provides us with more information about the activity of the SNS.
Catastrophizing Pain 4 weeks. The Pain Catastrophizing Scale (PCS) is a self-administered scale of 13 items and one of the most used to assess catastrophism of pain. The subjects take their past painful experiences as a reference and indicate the degree to which they experienced each of the 13 thoughts or feelings on a 5-point Líkert scale ranging from 0 (never) to 4 (always). The theoretical range of the instrument is between 13 and 62, indicating low scores, little catastrophism, and high values, high catastrophism.
Neck Disability Index (NDI) 4 weeks. The degree of cervical disability involvement was measured through the Neck Disability Index (NDI), translated into Spanish, presenting optimum reliability and internal validity. It consists of 10 sections, 4 of them are related to subjective symptoms and the other 6 are related to basic activities of daily life.
Each of the sections presents 6 possible responses, scoring these from 0 to 5 according to progression of functional disability.
Scores less than 5 points indicate non-disability, between 5-14 points indicates mild disability, values between 30-48 points moderate disability, between 50-64 points severe disability and those that exceed 70 points represent complete disability.Standard Deviation 2 (SD2) 4 weeks. It is a diameter from Poincaré plot which indicates the degree of longitudinal dispersion. It is thought to reflect long-term changes in RR intervals and it is considered an inverse indicator of parasympathetic activity.
pNN50 4 weeks. Percentage of consecutive RR intervals that differ by more than 50 ms from each other. A high value of pNN50 provides valuable information about high spontaneous HR.
Low/High Frequency ratio (HF/LF) 4 weeks. From low frequency and high frequency ratio of the HRV spectral analysis result we can estimate the vagal (related to relaxation and HF) and sympathetic (related to stress and LF) influence. Thus we can estimate sympathetic-vagal balance.
High Frequency Power (HF) 4 weeks. They are located between 0.15 and 0.4 Hz. HF is clearly related to PNS activity and has a relaxation-related effect on HR2.
Myoelectric activity 4 weeks. The electromyography (EMG) signal of the upper trapezius muscle was recorded during 3 step contractions of shoulder elevation force (15%-30% maximal voluntary contraction). The highest value of the three contractions was taken. The signal of the sternocleidomastoid muscle was recorded during 3 billateraly step contractions of neck flexión and antepulsion neck force. Both contractions were performed in a combined and simultaneous movement, recreating the movement produced by the reaction forces in the takeoff and landing of the fighter jet. Both movements were made at 15%-30% maximal voluntary contraction, as used by Calamita et al on the same musculature in subjects with nonspecific neck pain.
Root Mean Square of the Successive Differences (RMSSD) 4 weeks. It indicates the degree of activation of the Parasympathetic Nervous System on the cardiovascular system. It is obtained from the square root of the mean value of the sum of the squared differences of all successive RR intervals. This parameter reports the short-term variations of the RR intervals. It is directly associated with short-term variability.
Trial Locations
- Locations (1)
University of Extremadura
🇪🇸Badajoz, Spain