Eddie Vedder
2011-10-23, 15:23
...insulinkänslighet samt glukostolerans.
Det är ju på tapeten då och då om huruvida konditionsträning har en additiv effekt på visceral fettansamling jämfört med att enbart banta. Här kollade man dels visceral fettansamling men även intermuskulär, dvs den mellan musklerna (inte inuti musklerna).
Abstract
Intermuscular adipose tissue (IMAT) and visceral adipose tissue (VAT) are associated with insulin resistance. We sought to determine if exercise-induced weight loss (EX) results in greater reductions in IMAT and VAT as compared to similar weight loss induced by calorie restriction (CR), and whether these changes are associated with improvements in glucoregulation. Sedentary men and women (50-60 yr, BMI 23.5-29.9 kg/m2) were randomized to 1 year of CR (n=17), EX (n=16), or a control group (CON, n=6). Bilateral thigh IMAT and VAT volumes were quantified using multi-slice magnetic resonance imaging. Insulin sensitivity index (ISI) was determined from oral glucose tolerance test glucose and insulin levels. Weight loss was comparable (p=0.25) in the CR (-10.8±1.4%) and EX groups (-8.3±1.5%) and greater than in the control group(-2.0±2.4%, p<0.05). IMAT and VAT reductions were larger in the CR and EX groups than in the CON group (p≤0.05). After controlling for differences in total fat mass change between the CR and EX groups, IMAT and VAT reductions were nearly 2-fold greater (p≤0.05) in the EX group than in the CR group (IMAT: -45±5 vs. -25±5 mL; VAT: -490±64 vs. -267±61 mL). In the EX group the reductions in IMAT were correlated with increases in ISI (r=-0.71, p=0.003) while in the CR group, VAT reductions were correlated with increases in ISI (r=-0.64, p=0.006). In conclusion, calorie restriction and exercise-induced weight loss both decrease IMAT and VAT volumes. However, exercise appears to result in preferential reductions in these fat depots.
http://jap.physiology.org/content/early/2011/10/18/japplphysiol.00355.2011.full.pdf+html
Preferential Reductions in Intermuscular and Visceral Adipose Tissue with Exercise-Induced Weight Loss as compared to Calorie Restriction. J Appl Physiol. 2011 Oct 20. [Epub ahead of print]
Träningen i fråga var just konditionsträning och man ombads motionera vid en nivå som motsvarade en 16-procentig ökning av energiförbrukningen de tre första månaderna och sedan en 20-procentig ökning de resterande nio månaderna. Den fysiska aktiviteten var ganska bra kontrollerad tycker jag själv och de verkar ha tränat på hyfsat bra enligt de råd som de fick. Det är ju aldrig någonsin så att folk följer det upplägg som de ombeds följa till 100 procent men man kan utgå ifrån att de förmodligen tränade ordentligt mycket mer än kontrollgrupp och CR i alla fall.
Det är ju på tapeten då och då om huruvida konditionsträning har en additiv effekt på visceral fettansamling jämfört med att enbart banta. Här kollade man dels visceral fettansamling men även intermuskulär, dvs den mellan musklerna (inte inuti musklerna).
Abstract
Intermuscular adipose tissue (IMAT) and visceral adipose tissue (VAT) are associated with insulin resistance. We sought to determine if exercise-induced weight loss (EX) results in greater reductions in IMAT and VAT as compared to similar weight loss induced by calorie restriction (CR), and whether these changes are associated with improvements in glucoregulation. Sedentary men and women (50-60 yr, BMI 23.5-29.9 kg/m2) were randomized to 1 year of CR (n=17), EX (n=16), or a control group (CON, n=6). Bilateral thigh IMAT and VAT volumes were quantified using multi-slice magnetic resonance imaging. Insulin sensitivity index (ISI) was determined from oral glucose tolerance test glucose and insulin levels. Weight loss was comparable (p=0.25) in the CR (-10.8±1.4%) and EX groups (-8.3±1.5%) and greater than in the control group(-2.0±2.4%, p<0.05). IMAT and VAT reductions were larger in the CR and EX groups than in the CON group (p≤0.05). After controlling for differences in total fat mass change between the CR and EX groups, IMAT and VAT reductions were nearly 2-fold greater (p≤0.05) in the EX group than in the CR group (IMAT: -45±5 vs. -25±5 mL; VAT: -490±64 vs. -267±61 mL). In the EX group the reductions in IMAT were correlated with increases in ISI (r=-0.71, p=0.003) while in the CR group, VAT reductions were correlated with increases in ISI (r=-0.64, p=0.006). In conclusion, calorie restriction and exercise-induced weight loss both decrease IMAT and VAT volumes. However, exercise appears to result in preferential reductions in these fat depots.
http://jap.physiology.org/content/early/2011/10/18/japplphysiol.00355.2011.full.pdf+html
Preferential Reductions in Intermuscular and Visceral Adipose Tissue with Exercise-Induced Weight Loss as compared to Calorie Restriction. J Appl Physiol. 2011 Oct 20. [Epub ahead of print]
Träningen i fråga var just konditionsträning och man ombads motionera vid en nivå som motsvarade en 16-procentig ökning av energiförbrukningen de tre första månaderna och sedan en 20-procentig ökning de resterande nio månaderna. Den fysiska aktiviteten var ganska bra kontrollerad tycker jag själv och de verkar ha tränat på hyfsat bra enligt de råd som de fick. Det är ju aldrig någonsin så att folk följer det upplägg som de ombeds följa till 100 procent men man kan utgå ifrån att de förmodligen tränade ordentligt mycket mer än kontrollgrupp och CR i alla fall.