Tummy fat loss needs exercise versus CR?

[Guest guest]

Hi All,

The below pdf-available paper seems to say that CR has many pluses,

but exercise appears designed best for reducing our fat in our waist,

where it appears to confer a greater health risk. The relevant

section

of the Materials and Methods are given for further details.

I checked the pdf, since this post would have exceeded yesterday's

10-post limit. It seemed to me that the waist fat was reduced pretty

much the same. The glucose area under the curve for CR was reduced

significantly, but this was not so for exercise alone without CR.

For the insulin area under the curve, the exercise was required

for the difference to be significant, but the insulin sensitivity was

improved by CR, exercise and both CR and exercise. These were

all at 0.05 level of significance. Glucose when fasting and its

consequent level of HbA1c were better with CR also.

The BMI was reduced significantly for all three regimens, but more

so for treatments including CR. The same applied for the % body

fat and waist circumference. Lean body mass was maintained only

for exercise without CR and more at a significant level for both for

both regimens versus CR alone. Maximum VO2 also improved

significantly and best without CR for exercise. So exercise improved

physical performance.

The lipid numbers where to me spectacularly in favor of CR. The

total cholesterol/HDL ratio were better for CR, but the abstract

appears to emphasize the HDL aspect only.

So, it seemed that the authors may have had some exercise-

colored glasses that they looked through to see and report their

results in the abstract, and the text, for that matter.

That the authors were in the Department of Exercise Science

and the Department of Cardiology may explain some of the

color in those glasses.

The study is in obese diabetics, in a factor maybe limiting

the significance for CRers. 14 weeks is a fairly adequate

time frame.

J Clin Endocrinol Metab. 2004 Dec 14; [Epub ahead of print]

EXERCISE IS REQUIRED FOR VISCERAL FAT LOSS

IN POSTMENOPAUSAL WOMEN WITH TYPE 2 DIABETES.

Giannopoulou I, Ploutz-Snyder LL, Carhart R, Weinstock RS,

Fernhall B,

Goulopoulou S, Kanaley JA.

This study examined the effects of aerobic exercise without weight

loss,

a

hypocaloric high monounsaturated fat diet (HMF) and diet+exercise

(D+E) on

total

abdominal and visceral fat loss in obese postmenopausal women with

type 2

diabetes. Thirty-three postmenopausal women (BMI: 34.6 +/- 1.9 kg/m2)

were

assigned to one of three interventions: a hypocaloric HMF diet alone,

exercise

alone (EX), and HMF D+E for 14 weeks. Aerobic capacity, body

composition,

abdominal fat distribution (magnetic resonance imaging), glucose

tolerance

and

insulin sensitivity were measured pre and post intervention. Body

weight

(approxim-

ately 4.5 kg) and percent body fat (approximately 5%) were decreased

(P

< 0.05) with the D and D+E intervention, while only percent body fat

(approximately

2.3%) decreased with EX. Total abdominal fat and sc adipose tissue

(SAT) were reduced with the D and D+E interventions (P < 0.05), while

visceral

adipose tissue (VAT) decreased with the D+E and EX intervention, but

not the

D

intervention. Exercise alone resulted in a reduction in total

abdominal fat,

VAT, and SAT (P < 0.05) despite the lack of weight loss. The

reductions in

total

abdominal fat and SAT explained 57.2% and 9.7%, respectively, of the

variability

in the changes in fasting glucose levels, while the reductions in VAT

explained

15.9% of the changes in fasting insulin levels (P < 0.05). In

conclusion,

modest

weight loss, either through D or D+E, resulted in similar

improvements in

total

abdominal fat, SAT and glycemic status in postmenopausal women with

type 2

diabetes; however the addition of exercise to diet is necessary for

VAT

loss.

These data demonstrate the importance of exercise in the treatment of

women

with

type 2 diabetes.

PMID: 15598677 [PubMed - as supplied by publisher]

... Interventions

Diet - The D intervention was a HMF diet comprised of 40% fat (30%

monounsaturated, 5%

polyunsaturated, and 5% saturated), 40% carbohydrates (15% simple and

25%

complex carbohydrates)

and 20% protein (20). Olive oil was used as the main dietary source of

monounsaturated fat. A 2510 KJ

(600 kcal) deficit/day from the subjects weight maintenance total

energy

consumption was produced

based on the subjects RMR and adjusted for daily activity. At the

start of

the diet, subjects participated

in a nutritional consultation session where they were prescribed the

dietary

intervention. A 7-day diet

model was given to the subjects to ensure that they would follow the

diet as

accurately as possible.

Subjects also met once a week for one hour for motivational support

and

questions concerning

compliance with the diet. A 1-day dietary recall was completed every

two

weeks and analyzed (Food

Processor 7.81, ESHA Research, Salem, OR) for total energy

consumption and

relative percentages of

nutrients (fat, carbohydrates, protein) to ensure compliance with the

prescribed dietary regimen. Subjects

were also asked to refrain from any type of regular physical activity

during

the 14 weeks of the diet

treatment.

...

Cheers, Alan Pater