Comparison of the Effects of Chest PNF Techniques and Chest Mobility Exercises on Respiratory Function, Chest Expansion, and Functional Capacity in University Students With Smoking Addiction: A Single-Blind Randomized Controlled Study
Comparison of the Effects of Chest PNF Techniques and Chest Mobility Exercises on Respiratory Function, Chest Expansion, and Functional Capacity in University Students With Smoking Addiction: A Single-Blind Randomized Controlled Study
Smoking is a significant risk factor for heart, lung, and respiratory system diseases, and is particularly prevalent among young people and university students. In Turkey, tobacco use is high in the 15-24 age group, and smoking rates among university students are reported to be between 20% and 43%. Besides causing COPD and other respiratory diseases, smoking negatively impacts performance by increasing fatigue, dyspnea, and pain during exercise. It impairs lung function, reducing respiratory volumes such as FVC and FEV1. PNF and chest mobility exercises targeting the chest area can improve respiratory parameters by increasing respiratory muscle function and thoracic mobility. Recent studies show that chest PNF techniques have positive effects on lung function, chest expansion, and some physiological parameters, especially in smokers.
Smoking, due to the various chemical substances it contains, constitutes a risk factor for many diseases, primarily heart and lung diseases. It has been reported that smoking rates are higher among students living in underdeveloped or developing countries. Most users start smoking at a young age. Figures show that 31.9% of individuals aged 15-24 in Türkiye use tobacco (CDC, 2016). While there is no national study on universities across Turkey, studies report smoking prevalence rates ranging from 20.6% to 43.6%. Due to harmful substances like nicotine, smoking can lead to COPD, atherosclerosis, and other respiratory diseases. Furthermore, individuals who smoke are more likely to stop exercising due to fatigue, dyspnea, and pain. Smoking negatively impacts lung capacity, reducing FVC, FEV1, and FEV1/FVC volumes while increasing RV volume. Proprioceptive neuromuscular facilitation (PNF) techniques targeting the chest area are used in various populations to enhance respiratory muscle function and improve respiratory parameters. Improvements in range of motion, flexibility, and thoracic congruence can be achieved through both active and passive chest mobility exercises. Lengthening of the intercostal muscles allows for more efficient contraction. The underlying mechanism of chest mobility exercises involves increasing intercostal muscle length, facilitating effective muscle contraction. Facilitating the downward movement of the diaphragm and increasing the forward and backward movement capability of both the superior and inferior costal muscles improves the biomechanics of chest movement. Intercostal muscle rotation is best achieved by fully retracting the chest wall. Chest PNF technique has only recently begun to be used in smokers. Studies have shown that chest PNF techniques positively improve lung function and chest expansion in male smokers. A study conducted on female smokers showed that chest PNF technique followed by breathing exercises regulated blood pressure.
Objective: The aim of study is to compare the effectiveness of chest PNF techniques and chest mobility exercises in university students who are smokers. Study Hypotheses:
H0: There is no difference between chest PNF techniques and chest mobility exercises in respiratory functions, chest expansion, and functional capacity in university students who are smokers.
H1: There is a difference between chest PNF techniques and chest mobility exercises in respiratory functions, chest expansion, and functional capacity in university students who are smokers.
H2: The effects of chest PNF techniques on respiratory functions, chest expansion, and functional capacity in university students who are smokers are not different from the control group.
H3: The effects of chest PNF techniques on respiratory functions, chest expansion, and functional capacity in university students who are smokers are different from the control group.
H4: The effects of chest mobility exercises on respiratory functions, chest expansion, and functional capacity in university students who are smokers are not different from the control group. H5: The effects of chest mobility exercises on respiratory function, chest expansion, and functional capacity differ in university students who are smokers compared to the control group.
Scope: This research is a prospective experimental study. The study will be conducted on 30 individuals who meet the inclusion criteria. The study population will be formed through announcement and invitation, and interventions will be implemented at the Yalova University Physiotherapy and Rehabilitation Application and Research Center.
Method: In calculating the minimum sample size for the study, FEV1 was used as the primary variable, and the effect size was calculated by considering data from a previous study in the literature that investigated the effectiveness of exercise in smoking addiction. Using the GPower 3.1 program, with a 95% confidence interval, 90% power, and Cohen's f=0.7797218 effect size, the calculation revealed that the minimum sample size for the study should be 27 individuals. Considering participant dropout and data loss, 10% more participants will be included. Accordingly, the study is planned to be conducted with 30 people. Participants will be included in the study through invitation and announcement. The study will be conducted with individuals who meet the inclusion criteria. Participants will be randomized into 3 groups: Chest PNF Techniques, Chest Mobility Exercises, and Control. This randomization will be performed using randomizer.org, an open-access randomization site. Both groups will be evaluated during the initial interview, and after completing an informed consent form, the participants will be informed about the process. The study will be conducted on individuals with smoking addiction. The inclusion criteria include a Fagerström Nicotine Dependence Questionnaire score of ≥4, which is considered indicative of nicotine dependence. Turkish validity and reliability were established by Uysal et al.
Data Collection Tools:
Demographic Information, Pulmonary Function Test Measurements are taken with a portable spirometer (Cosmed Pony FX, Cosmed, Rome, Italy) while the person is in a seated position, Dyspnea Assessment: Modified Medical Research Council, Functional Capacity Assessment: Six-Minute Walk Test - 6MWT, Depression Assessment: The Beck Depression Inventory (BDI), Quality of Life Assessment: Patients' quality of life will be assessed using the Short Form-36 (SF-36), Chest Expansion: Chest expansion was assessed by measuring the circumference of the chest wall at maximum inspiration and maximum expiration, Fatigue: Patients' fatigue was assessed using the Turkish adaptation of the Fatigue Severity Scale, Physical Activity Level Assessment: International Physical Activity Questionnaire Short Form - IPAQS, Harvard Step Test: This test, used to measure cardiopulmonary endurance and physical fitness, involves individuals climbing and descending steps for 5 minutes.
Group Exercise Programs:
The Chest PNF Techniques and Chest Mobility Exercises group will receive treatment for a total of 6 weeks, with 3 sessions of 30 minutes per week. The control group will not receive any treatment.
Chest PNF Techniques Group: Chest PNF exercises will be performed in supine, side, and prone positions. The combined isotonic contractions technique will be used to improve respiratory control. Each technique will be performed for 12 repetitions. In all positions, the patient is first asked to exhale. Pressure and stretching are applied in the opposite direction of the movement. While the patient inhales, the physiotherapist controls the resistance to allow movement. If necessary, more resistance is applied to stronger areas to distribute the force to weaker areas. Supine position: Both hands are placed on the sternum and pressure is applied obliquely downwards. The hands are placed parallel and diagonally on the lateral chest wall, over the lower ribs. To focus on the upper chest area, the hands are similarly placed on the pectoral muscles.
Side-lying position: Both hands are placed parallel and diagonally on the lateral chest wall, over the lower ribs. This position is beneficial in distributing the force to the upper chest movement as it will provide resistance to the lower chest movement.
Prone position: Hands are placed parallel and diagonally on the lower ribs. In the forearm support position, one hand is placed on the sternum and the other hand on the intercostal region Chest Mobility Exercises Group: Chest mobility exercises will be performed. The exercises will be performed in combination with diaphragmatic breathing exercises, with 18-20 repetitions and 30-second breaks.
Chest rotation: The person is in a supine position. They extend their arms into an inverted T position. The physiotherapist places their hands on the underside of the rib cage and applies stress in the opposite direction.
Passive lateral flexion in side lying position: The person is positioned in a side lying position with their arms hanging down from the stretcher, supported by a pillow. The therapist performs passive flexion of the rib cage from the head to the left and right sides, with slight overextension in the final range.
Thoracic facet joint mobilization in supine position: The physiotherapist places one hand on the person's thoracic region and the other on the chest, and performs mobilization with the person lying supine with their arms crossed in front.
Trunk rotation in sitting position: The physiotherapist stands behind the person in a sitting position. They actively and passively rotate the trunk on both sides.
Arm movement in front of the chest while sitting: While sitting, the person raises their arms. While exhaling, they raise their arms above their head, then slowly lower them while inhaling. Cat-camel exercise: While in a crawling position, inhale, arch your back, and bring your head forward. Then, exhale, lower your back towards the ground and extend your head backward.
Pectoral stretch: With elbows bent and hands clasped behind the neck, hold the shoulder in abduction and stretch the pectoralis major muscle. Breathe diaphragmatically through the nose for 4 seconds and exhale through the mouth for 6 seconds. Encourage chest opening while inhaling.
Chest movement in crawling position: While in a crawling position, try to bring one hand towards the opposite knee, return to the starting position, rotate the trunk, and perform upper extremity flexion and abduction. Repeat for the opposite side.
Control Group: No intervention will be performed. Statistical Analysis The data obtained in the study will be loaded into the SPSS 26.0 software package and analyzed. Numerical data will be presented as mean and standard deviation; categorical data will be presented as number and percentage. Normality will be analyzed using the Shapiro-Wilks test. For within-group comparisons between pre-tests and post-tests, a paired t-test will be used if the assumptions of normal distribution are met; otherwise, the Wilcoxon signed-rank test will be used. For between-group comparisons, a one-way ANOVA test and the Tukey test (post-hoc test) will be used if the assumptions of normal distribution are met; otherwise, the Kruskal-Wallis test and the Bonferroni correction (post-hoc test) will be applied. The significance level will be set at p<0.05.
Inclusion Criteria:
Exclusion Criteria:
gozde.arica@yalova.edu.tr+905318893236
busra.kayabinar@yalova.edu.tr+905553156871