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weight loss program designed specifically for maleshift workers.

Men were 44.2 ± 8.6 yrs old, of which 45%were overweight (BMI kg/m2 ≥ 24.5), 47% obese(BMI kg/m2 ≥ 29.5) and 8% healthy weight (BMIkg/m2 < 24.5). The average waist circumferencewas 101 cm and 68.5% of participants had waist cir-cumferences > 94 cm.

Participants completed a 29-item eatingbehaviour and alcohol consumption questionnaireduring the baseline assessment which providedthe following data: almost half (41%) did notattempt to balance their food intake with theiractivity level and indicated they should ‘‘cleantheir plate’’ even when they were not hungry(47%). 43% regularly bought full-cream milk and33% regularly purchased reduced fat milk. 63% oftheir fruit and 91% of their vegetable intakes werewell below Australian Guide to Healthy Eatingrecommendations. Almost 30% reported drinking7—9 standard drinks on a typical drinking day and34% drank >6 standard drinks at least 2 days perweek.

Intervention programs aimed at improving eatinghabits are urgently needed for this population, andare likely to be well-received as 89% reported thatthey would like to eat healthier. Key dietary focusareas are increasing fruit and vegetable intakes,decreasing energy dense foods and alcohol con-sumption to help decrease body weight, chronicdisease risk and alcohol related harm.

doi:10.1016/j.orcp.2010.09.007

P07

Eating behaviour and early weight loss afterlaparoscopic adjustable gastric banding

A. Dodsworth ∗, H. Warren-Forward, S. Baines

School of Health Sciences, Faculty of Health, Uni-versity of Newcastle, Australia

Weight loss outcomes after laparoscopicadjustable gastric banding (LAGB) are variable,yet few studies have examined postsurgical eat-ing behaviours that may positively or negativelyinfluence weight outcomes. The aim of this studywas to explore the relationship between eatingbehaviours and early weight loss in adults whohave had LAGB.

Subjects were female and male LAGB patients(n = 47, mean age 44.5 ± 10.6 years, mean BMI

42.2 ± 7.8 kg/m2) enrolled in a pilot study evalu-ating the utility of a protein-enriched diet afterLAGB.

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34

Poster Abstracts

Eating behaviour was assessed at baseline and 3onths post surgery using the Three Factor Eatinguestionnaire, which measures eating behaviourimensions of restraint, disinhibition and hunger.he relationship between these variables and per-entage weight loss at 3 months was explored usingorrelations and multiple regression analysis.

Dietary restraint was positively correlated witheight loss (r = 0.36, p = 0.028); with the flexi-le control subscale more highly correlated witheight loss than rigid control (r = 0.34, p = 0.035s. r = 2.8, p = 0.134). Conversely, disinhibition wasegatively correlated with weight loss (r = −0.38,= 0.02). A multiple regression model with dis-

nhibition and gender found disinhibition to besmall yet significant predictor of weight loss,

ccounting for 22.3% of the variance in percentageeight loss at 3 months [F(2,33) = 6.019, p = 0.006]

disinhibition ˇ = −0.454, p = 0.006).Results suggesthat subjects who have higher levels of post-perative disinhibition, which reflects a tendencyo overeat in response to certain environmental,ituational and social cues, may be at risk ofoorer weight loss after surgery. Early identificationf such behaviours may help ensure appropriateehavioural counselling strategies are employed forptimising weight loss in these individuals. Fur-her research with larger sample populations andonger follow-up will useful to further identify eat-ng behaviours that impact on weight outcomesfter LAGB.

oi:10.1016/j.orcp.2010.09.008

08

xercise: Which intensity for fat loss?

.E. Wood ∗, N.M. Byrne, A.P. Hills

Institute of Health and Biomedical Innovation andchool of Human Movement Studies, Queenslandniversity of Technology, Australia

While exercise is considered an importantomponent of weight loss programs, there is consid-rable debate over the intensity that results in theost efficient fat loss; that is, the intensity whichrovides the best return per unit time invested.he aim of this study was to compare fat oxidationnd energy expenditure during two 60-min exer-ise bouts: one performed at 80% of ventilatoryhreshold (VT), and the other at the intensity cor-esponding to the maximal rate of fat oxidation

MFOint) for an individual.

Six males and five females (age:1.1 ± 5.5 y, BMI: 24.7 ± 4.0 kg/m2, VO2max:7.4 ± 8.5 mL/kg/min) volunteered to participate.

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ach participant completed four exercise tests:1) a maximal incremental exercise test for theetermination of VO2max and ventilatory thresholdVT), (2) a discontinuous incremental exercise testith 4-min stages for the determination of MFOint,

3) a 60-min constant load exercise bout at 80%VT,nd (4) a 60-min constant load bout at MFOint.hole body fat oxidation was calculated from

espiratory gases measured throughout each test.The maximal rate of fat oxidation derived

rom the discontinuous test was 0.36 ± 0.13 g/min.his corresponded to an intensity of 129 ± 35 W51 ± 7%VO2max), which was significantly lower thanhe intensity at 80%VT (174 ± 48 W; 59 ± 7%VO2max,< 0.0001). Average HR and VO2 were higher

P < 0.0001), and respiratory exchange ratio (RER)as lower (P = 0.006) in the 80%VT bout comparedith MFOint. [BLa] remained stable across each of

he bouts, but was significantly higher in the 80%VTout than the MFOint bout (4.00 ± 0.20 mmol/Lnd 2.30 ± 0.13 mmol/L, respectively; P = 0.001).otal energy expenditure over 60 min was signifi-antly greater in the 80%VT bout (664 ± 180 kcal)han the MFOint bout (511 ± 134 kcal; P < 0.0001).at oxidation increased significantly over the0 min at both intensities (P < 0.0001). Averageat oxidation (MFOint: 0.34 ± 0.10 vs. 80%VT:.30 ± 0.10 g/min), and therefore total fat oxidisedMFOint: 20.4 ± 5.9 g vs. 80%VT: 18.1 ± 5.8 g), wasimilar between intensities.

The main finding was that fat oxidation wasimilar during 60-min exercise bouts performed atFOint and 80%VT. Given that both intensities wereell-tolerated, it is preferable to exercise at 80%VT

o maximise energy expenditure.

oi:10.1016/j.orcp.2010.09.009

09

utrient preferences and appetite responses toigh- and low-intensity intermittent exercise inbese men

.A. Alkahtani ∗, A.P. Hills, N.M. Byrne, N.A. King

School of Human Movement Studies, Institute ofealth and Biomedical Innovation, Queensland Uni-ersity of Technology, Australia

Intermittent exercise has been suggested asn alternative method of weight managemento traditional continuous exercise. The effect ofntermittent exercise on appetite and food pref-

rence has received less attention. This studynvestigated the influence of different intensi-ies of intermittent exercise on food preferencesnd appetite sensations in obese men. Twelve

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bese males (mean age = 29 y (range 24—38); meanMI = 29.1 kg/m2 (range 25.5—35); mean %fat mass1.7 (range 25.7—35.3) completed three exerciseessions: an initial graded exercise test, and twontermittent cycling sessions: low-intensity (LI) andigh-intensity (HI) sessions on separate days inandom order. The LI session involved 5-min rep-titions of workloads 20% below and then 20%bove the FAT-max intensity. The HI session con-isted of cycling for alternate bouts of 15 s at5% VO2max and 15 s unloaded recovery. Appetiteensations and food preferences were measuredmmediately before and after the exercise ses-ions using computer-based Visual Analogue ScaleVAS) and the Liking and Wanting (L&W) exper-mental procedure 1. The L&W method assessesxplicit liking and wanting, relative frequency ofhoice and implicit wanting. The mean work loads,ntensities and durations for the HI and LI exer-ise sessions were 80.7 ± 11.1 W and 48 ± 0.02%O2max for 17.5 ± 3.9 min, and 49.6 ± 12.5 W and4 ± 0.05% VO2max for 30 min, respectively. Thereas a significant effect of time on explicit lik-

ng and wanting regarding the taste (p ≤ 0.001)nd fat content (p < 0.001) of food. Relative fre-uency of choice revealed that the HI exerciseession significantly increased the preference forigh-fat foods (p < 0.001), but no effect on taste.mplicit wanting decreased in all food categoriesfter both LI and HI — the mean decrease was sig-ificantly lower after LI (p < 0.001). There were noffects of time or intensity on appetite sensationsut thirst increased. In conclusion, manipulatinghe intensity of acute intermittent exercise didot affect appetite, but did affect acute foodreferences.

oi:10.1016/j.orcp.2010.09.010

10

-3 enrichment of a high saturated fat diet ame-iorates hepatic fat accretion through pathwayshat limit fat storage and lipogenesis

.K. Philp 1,∗, A. Janovska 1, G. Hatzinikolas 1, L.eilbronn 1, G. Mayrhofer 2, G.A. Wittert 1

Disciplines of Medicine, University of Adelaide,ustraliaMicrobiology and Immunology, University of Ade-

aide, Australia

High saturated fatty acid (FA) diets (HF-S) are

ssociated with insulin resistance and increasedardiometabolic risk. Partial replacement of satu-ated fat with n−3 FAs (HF-n−3) may be protective,ut the mechanisms remain unclear.