Short-Term Effects of Weight Loss after Bariatric Surgery on Respiratory and Skeletal Muscles’ Strength

Abdolreza Mehdinavaz; Khosrow Najjari; Mohammad Talebpour; Hossein  Zabihi-Mahmoudabadi; Mastaneh  Rajabian Tabesh; Fezzeh Elyasinia; Farhad Kor; MohammadReza Fattahi; Maryam Abolhasani

doi:10.18502/jimc.v5i4.11344

Abdolreza Mehdinavaz Department of Surgery, Tabriz University of Medical Sciences, Tabriz, Iran
Khosrow Najjari Department of Surgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
Mohammad Talebpour Department of Surgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
Hossein Zabihi-Mahmoudabadi Department of Surgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
Mastaneh Rajabian Tabesh Cardiac Primary Prevention Research Centre, Tehran Heart Centre, Tehran University of Medical Sciences, Tehran, Iran
Fezzeh Elyasinia Department of Surgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
Farhad Kor Department of Surgery, Golestan University of Medical Sciences, Gorgan, Iran
MohammadReza Fattahi Department of Surgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
Maryam Abolhasani Cardiac Primary Prevention Research Centre, Tehran Heart Centre, Tehran University of Medical Sciences, Tehran, Iran

DOI: https://doi.org/10.18502/jimc.v5i4.11344

Keywords: Bariatric surgery, Fat mass, Obesity, Respiratory muscles

Abstract

Background: Bariatric surgery leads to weight loss and body fat percentage reduction, but patients are prone to lean tissue loss which itself reduces the quality of life, and increases the risk of deatand h. This study evaluated the effects of bariatric surgery and changes in Fat Mass (FM) and Fat-Free Mass (FFM) on the respiratory and skeletal muscles’ strength three months after bariatric surgery.

Methods: After obtaining demographic information, anthropometric measurements and body composition analysis, including Body Mass Index (BMI), FM, FFM, Percent Body Fat (PBF), handgrip isometric force, respiratory muscle forces and spirometry volumes, were assessed before and three months after bariatric surgery in 50 men and women undergoing this surgery.

Results: Weight, BMI, FM, PBF and FFM isometric muscle force were decreased significantly. In contrast, respiratory muscle forces and respiratory volumes were increased significantly three months after the surgery. Reduction in FFM 3 months after the surgery did not lead to a change in respiratory muscle strength (p-values≥0.05).

Conclusion: According to our findings, FM and FFM along with weight and BMI decrease significantly after bariatric surgery. These alternations were accompanied by a significant increase in respiratory muscle strength but were not correlated with handgrip muscle force changes.