Weight loss associated with low-energy diets with different glycaemic loads does not improve arterial stiffness: a randomised clinical trial.
Lisiane PerinIsadora G CamboimCláudia D SchneiderAlexandre Machado LehnenPublished in: The British journal of nutrition (2023)
We evaluated the effects of two low-energy diets with different glycaemic loads on arterial stiffness in adults with excess weight. This was a 45-day parallel-group, randomised clinical trial including seventy-five participants (20-59 years; BMI 32 kg/m 2 ). They were assigned to two similar low-energy diets (reduction of ∼750 kcal.d -1 ) with macronutrient composition (55 % carbohydrates, 20 % proteins and 25 % lipids) but different glycaemic loads: high-glycaemic load (HGL 171 g.d -1 ; n 36) or low-glycaemic load (LGL 67 g.d -1 ; n 39). We evaluated: arterial stiffness (pulse wave velocity, PWV); augmentation index (AIx@75); reflection coefficient; fasting blood glucose; fasting lipid profile; blood pressure and body composition. We found no improvements in PWV ( P = 0·690) and AIx@75 ( P = 0·083) in both diet groups, but there was a decrease in the reflection coefficient in the LGL group ( P = 0·003) compared with baseline. The LGL diet group showed reductions in body weight (Δ -4·9 kg; P = 0·001), BMI (Δ -1·6 kg/m 2 ; P = 0·001), waist circumference (Δ -3·1 cm; P = 0·001), body fat (Δ -1·8 %; P = 0·034), as well as TAG (Δ -14·7 mg/dl; P = 0·016) and VLDL (Δ -2·8 mg/dl; P = 0·020). The HGL diet group showed a reduction in total cholesterol (Δ -14·6 mg/dl; P = 0·001), LDL (Δ -9·3 mg/dl; P = 0·029) but a reduction in HDL (Δ -3·7 mg/dl; P = 0·002). In conclusion, a 45-day intervention with low-energy HGL or LGL diets in adults with excess weight was not effective to improve arterial stiffness. However, the LGL diet intervention was associated with a reduction of reflection coefficient and improvements in body composition, TAG and VLDL levels.
Keyphrases
- weight loss
- body composition
- blood pressure
- blood glucose
- clinical trial
- body weight
- type diabetes
- bariatric surgery
- glycemic control
- body mass index
- roux en y gastric bypass
- resistance training
- open label
- gastric bypass
- weight gain
- double blind
- bone mineral density
- study protocol
- hypertensive patients
- randomized controlled trial
- heart rate
- diffusion weighted imaging
- phase ii
- physical activity
- insulin resistance
- obese patients
- low density lipoprotein
- high intensity