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Cycling, Rowing Is Beneficial for Obesity and Type 2 Diabetes

by Samhita Vitta on Sep 24 2020 1:37 PM

High-intensity interval training (HIIT) which includes cycling and rowing improves insulin sensitivity, body composition and cardiorespiratory fitness in obesity and type 2 diabetes.

Cycling, Rowing Is Beneficial for Obesity and Type 2 Diabetes
High-intensity interval training (HIIT) combining cycling and rowing improves insulin sensitivity, body composition and cardiorespiratory fitness obesity and type 2 diabetes (T2D) patients. //
Physical activity plays an important role in the prevention and treatment of type 2 diabetes. However, aerobic exercise, like jogging has only a modest (10-20%) improvement in insulin sensitivity.

The study consisted of 48 men in which15 men had type 2 diabetes and were obese (average BMI 31kg/m2). They were compared with two age-matched groups of healthy glucose-tolerant men.

The study also consisted of 15 non-diabetic participants with obesity (average BMI 31kg/m2) and 18 participants who were lean (average BMI 24kg/m2).

The participants underwent an 8-week supervised HIIT program which consisted of 3 sessions per week. The training included periods of both cycling and rowing.

Dual-energy X-ray absorptiometry (DXA) scans were used to determine body composition and VO2 max tests were used to measure oxygen utilization, and euglycemic-hyper-insulinemic clamps combined with indirect calorimetry to evaluate insulin sensitivity and metabolism.

The HIIT-sessions consisted of blocks of a minute burst of exercise done five times interspersed with 1 min rest, shifting between blocks on cycle and rowing ergometers, and with an increasing volume from 2 to 5 blocks during the 8 weeks.

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At the start of the study, men with type 2 diabetes had 35-37% lower insulin sensitivity and approximately 13% lower insulin-mediated suppression of lipid oxidation compared with the non-diabetic subjects.

After HIIT training for 8 weeks, all participants showed big improvements in insulin sensitivity. Average increases of 32-37% were observed in lean men and men with obesity. The increase among the diabetic group was averaged as 44%.

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Blood sugar levels also improved in those participants with type 2 diabetes, resulting in both lowered fasting plasma glucose and a fall in glycated hemoglobin (HbA1c).

The researchers also observed a reduction of 1.6-2.3 kg of body fat mass in all three groups. Fat-free mass also increased by 0.9-1.5 kg in men with diabetic and non-diabetic men with obesity.

A 10% increase in VO2max was also observed in lean and obese healthy men, and an increase in 15% was observed in the type 2 diabetes group.

"A HIIT-protocol recruiting both lower and upper body muscles efficiently improves insulin sensitivity, VO2max and body composition to the same extent in obesity and type 2 diabetes as in lean, healthy individuals," the authors concluded.

"In patients with type 2 diabetes, the HIIT-protocol also improved glycemic control," they added.



Source-Medindia


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