Publications by authors named "Amal Salhi"

4 Publications

  • Page 1 of 1

The effects of exercise training on plasma volume variations: A systematic review.

Int J Sports Med 2021 Oct 12. Epub 2021 Oct 12.

Higher Institute of Sport and Physical Education of Ksar-Saïd, Manouba, Tunisia., Higher Institute of Sport and Physical Education of Ksar-Saïd, Manouba, Tunisia., Tunis, Tunisia.

The aim of this systematic review was to summarize the evidence on the acute and long-term effects of exercise training on PV, in both trained and untrained individuals and to examine associations between changes in %PVV and change in physical/physiological performance. Despite the status of participants and the exercise duration or intensity, all the acute studies reported a significant decrease of PV (effect size: 0.85
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http://dx.doi.org/10.1055/a-1667-6624DOI Listing
October 2021

Evaluation of vitamin D bioaccessibility and mineral solubility from test meals containing meat and/or cereals and/or pulses using in vitro digestion.

Food Chem 2021 Jun 3;347:128621. Epub 2020 Dec 3.

Aix Marseille Univ, INRAE, INSERM, C2VN, Marseille, France. Electronic address:

In this study, we evaluated vitamin D and mineral (iron, zinc, magnesium) transfer to the bolus aqueous phase during the digestion of meals with/without pulses. We performed in vitro digestions using test meals made either of i) beef and/or semolina and/or chickpeas, or of ii) potatoes supplemented or not with fibers, phytates, tannins and saponins. Chickpea presence led to a decrease in vitamin D bioaccessibility (-56%, p ≤ 0.05) and mineral solubility (-28% for iron, p ≤ 0.05) compared with meals with beef and/or semolina only. This effect was largely compensated for vitamin D by the fact that this vitamin was more stable during digestion of meals based on plant foods only than of meals with beef. Tannins were the most deleterious compounds for iron solubility, while phytates and tannins decreased vitamin D bioaccessibility. Agronomical or technical solutions to selectively decrease the amount in pulses of compounds that affect micronutrient bioavailability should be further explored.
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http://dx.doi.org/10.1016/j.foodchem.2020.128621DOI Listing
June 2021

Exercise Training and Fasting: Current Insights.

Open Access J Sports Med 2020 21;11:1-28. Epub 2020 Jan 21.

Higher Institute of Sport and Physical Education, Ksar-Said, University of Manouba, Manouba, Tunisia.

Fasting is defined as the abstinence from consuming food and/or beverages for different periods of time. Both traditional and modern healthcare systems recommend fasting as a therapeutic intervention for the management of several chronic, non-infectious diseases. Exercising during a fasting state increases lipolysis in adipose tissue while also stimulating peripheral fat oxidation, resulting in increased fat utilization and weight loss. A key focus of this review is to assess whether endurance training performed while fasting induces specific training adaptations, where increased fat oxidation improves long-term endurance levels. Fasting decreases body weight, lean body and fat content in both trained and untrained individuals. Several studies indicate a broader impact of fasting on metabolism, with effects on protein and glucose metabolism in sedentary and untrained subjects. However, there are conflicting data regarding the effects of fasting on glucose metabolism in highly trained athletes. The effects of fasting on physical performance indicators also remain unclear, with some reporting a decreased performance, while others found no significant effects. Differences in experimental design, severity of calorie restriction, duration, and participant characteristics could, at least in part, explain such discordant findings. Our review of the literature suggests that there is little evidence to support the notion of endurance training and fasting-mediated increases in fat oxidation, and we recommend that endurance athletes should avoid high intensity training while fasting.
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http://dx.doi.org/10.2147/OAJSM.S224919DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6983467PMC
January 2020

Characterization of all the lipolytic activities in pancreatin and comparison with porcine and human pancreatic juices.

Biochimie 2020 Feb 6;169:106-120. Epub 2019 Jul 6.

Aix Marseille Univ, CNRS, BIP, UMR7281, 31 Chemin Joseph Aiguier, 13402, Marseille Cedex 9, France. Electronic address:

Porcine pancreatic extracts (PPE), also named pancreatin, are commonly used as a global source of pancreatic enzymes for enzyme replacement therapy in patients with exocrine pancreatic insufficiency. They are considered as a good substitute of human pancreatic enzymes and they have become a material of choice for in vitro models of digestion. Nevertheless, while the global PPE contents in lipase, protease and amylase activities are well characterized, little is known about individual enzymes. Here we characterized the lipase, phospholipase, cholesterol esterase and galactolipase activities of PPE and compared them with those of porcine (PPJ) and human (HPJ) pancreatic juices. The phospholipase to lipase activity ratio was similar in PPJ and HPJ, but was 4-fold lower in PPE. The galactolipase and cholesterol esterase activities were found at lower levels in PPJ compared to HPJ, and they were further reduced in PPE. The enzymes known to display these activities in HPJ, pancreatic lipase-related protein 2 (PLRP2) and carboxylester hydrolase/bile salt-stimulated lipase (CEH/BSSL), were identified in PPJ using gel filtration experiments, SDS-PAGE and LC-MS/MS analysis. The galactolipase and cholesterol esterase activities of PPE indicated that PLRP2 and CEH/BSSL are still present at low levels in this enzyme preparation, but they were not detected by mass spectrometry. Besides differences between porcine and human enzymes, the lower levels of phospholipase, galactolipase and cholesterol esterase activities in PPE are probably due to some proteolysis occurring during the production process. In conclusion, PPE do not provide a full substitution of the lipolytic enzymes present in HPJ.
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http://dx.doi.org/10.1016/j.biochi.2019.07.004DOI Listing
February 2020
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