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Effects of Ruesi Dadton (Self-Stretching for Chest Exercise) on Chest
Expansion, Respiratory Muscle Strength and Pulmonary Function in
50-90-year-old Thais
‡
§
†
*,¶
Wanlapa Leelananthakul , Netchanok Chinnaket , Pradittha doungdech , Suthamat Boonrat ,
Suwanna Maenpuen*
*Department of Applied Thai Traditional Medicine, Faculty of Medicine,
Mahasarakham University, Mahasarakham 44000, Thailand
† Ladtacher Health Promoting Hospital, Muang District, Sakon Nakhon 47000, Thailand
‡
Department of Thai Traditional and Alternative Medicine, Nonthaburi 11000, Thailand
§ Samprao Health Promoting Hospital, Muang District, Udon Thani 41000, Thailand
¶
Corresponding author: wanlapa.l@msu.ac.th

Abstract
This study aimed to evaluate the effect of Ruesi Dadton, or self-stretching (chest exercise posture), on
chest expansion, respiratory muscle strength and pulmonary function in 25 healthy persons, aged 50 to 90
years, in Maha Sarakhamûs Kaeng Loeng Chan subdistrict community. Each participant practised the chest-
trouble therapy posture of Ruesi Dadton for 30 minutes, 3 times a week every other day for 4 weeks. Before
and after exercise, the subjects were assessed for chest expansion, respiratory muscle strength and pulmonary
function. Data were collected and then analyzed using descriptive statistics and t-test, using the significance
level of 0.05. The findings revealed that after exercise the subjects had significant decreases (p < 0.05) in
heart rate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP), and they also showed a
significant increase (p < 0.001) in vital capacity (VC) compared to those before exercise. Moreover, after
exercise, their forced vital capacity (FVC), maximal inspiratory pressure functional residual capacity, sniff
nasal pressure (PImaxRV, Pnsn) and chest expansion values were significantly higher (p < 0.05) than before
exercise. It is thus concluded that the practice of chest exercise posture of Ruesi Dadton helps improve chest
expansion, respiratory muscle strength and pulmonary function for healthy Thais aged 50 years and over.
Therefore, this posture of Ruesi Dadton should be an alternative exercise program for promoting pulmonary
function in bed-bound elderly patients.
Key words: Ruesi Dadton, self-stretching for chest exercise, chest expansion, respiratory muscle
strength, pulmonary function

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