22nd IADMS , Singapore

Brown.DD,1,2,4Wyon, MA 1,2,3 1 Research Centre for Sport, Exercise and Performance, University of Wolverhampton, UK

2 ArtEZ Institute of the Arts , Arnhem , The Netherlands3 Jerwood Performance Centre, Birmingham Royal Ballet, UK

4Codarts University of the Arts , Rotterdam, The Netherlands

Glycaemic IndexBy definition, the glycaemic index (GI):

compares equal quantities of carbohydrate in foods

is a measure of their effect on blood glucose levels in healthy people over a 2 hr period

provides a measure of carbohydrate quality.Expressed as a %

Time

GI = 30

GI = 100

BG

LB

GL

The Feeling ScaleThe Feeling ScaleHardy and Rejeski(1989)Hardy and Rejeski(1989)

• Feeling Scale (FS)was developed to measure the valence (pleasure–displeasure, good–bad)component of affect.

• Correlation• r=0.51 and 0.81

Research Aims:

The purposepurpose of this longitudinal study was to determine if pre-class ingestion of an energy sport bar with moderate glycaemic index (MGI) had an impact BG levels and affect

What are psychological affects from skipping breakfast

Participants

N=12 Dancers-Dietary analysisN=11 Experimental protocol

Gender N Age (yrs)

Height (m)

Weight (kg)

Male 2 21± 1.4 175± 0.06 60± 1.4

Female 10 20± 1.5 178± 0.01 62± 5.2

MethodsParticipants: Dance academy , Amsterdam The Netherlands

Signed consent and health forms in either Dutch or English.

Completed 3-d dietary record. IRB approved protocol.

chronic smokers and diet manipulation of those with pre-existing gastrointestinal conditions.

metabolic disease and none were consuming medication or drugs known to influence lipid or carbohydrate metabolism.

Methods

CHO GROUPCHO GROUP

FASTGROUPFASTGROUP

MGI=59

Feeling Scale (FS)Hardy and Rejeski(1989)Hardy and Rejeski(1989)

How are you feeling at this moment? How are you feeling at this moment?

Protocol Point-of-care glucose device (POC) (Accu-chek

Compact Plus, Roche Diagnostics, Mannheim,

Germany).

ProtocolA balanced crossover experimental design was implemented, thus participants served as their own control

CHO

FAST

Class+ BG and FS 30,60 min

Baseline BG & FS

measurement-20min

Class+ BG and FS 30,60 min

CHO

FAST

Class+ BG and FS 30,60 min

Class+ BG and FS 30,60 min

Methods

Data Analysis Data for blood glucose measurements and FS

Blood glucose(BG) and FS values were analysed using a 2x4 repeated-measures ANOVA.

Methods

Statistical analysis via SPSS (version 16.0).Statistical significance was set at p<0.05.

RESULTS

Glucose MetabolitesGlucose Metabolites

Pleasure –Displeasure

Glycaemic FactorsIngestion of a MGI CHO compared with FAST(water) impacts BG levels.

In FAST trial, BG concentration rapidly from baseline to second time, point and the fell slightly.

The CHO trial, the rise was minimal with the subsequent marginal decline in glucose level, but less than the FAST trial.

Affective Measures The results support the valence of affect as a result of dietary manipulation.

Pleasure ratings became more (+ve) during the second time point (30m), followed by a decline in pleasure for both trials towards the final time point (60m).

Overall ratings of pleasure were (+) during the FASTFAST trial, compared with the CHO trial.

Discussion 4 possible explanations

Gender : cohorts in sport comprised all male participants.

Time points shorter than in sport: 15m intervals not practical for dance class

No-follow up affect test ( Felt Arousal Scale)

Dietary intervention (kcal 12% instead of normal 31% and taste…

ConclusionsDietary manipulation towards a CHO-rich Dietary manipulation towards a CHO-rich meal impacts concentration of blood glucose. meal impacts concentration of blood glucose.

Skipping breakfasts, Skipping breakfasts, can affect students’ can affect students’ pleasure-displeasure during dance classpleasure-displeasure during dance class

This study highlights the importance of

assessing a psychological parameter together with a physiological parameter

A large thanks goes to :

Angela Linssen ( Director AHK Modern dance department)

3rd year class for offering there time, energy and BLOOD for this studyMargot Rijven my assisting angel

And THANK YOU for listening !And THANK YOU for listening !

School of Sport, Performing Arts and LeisureWalsall, United Kingdom

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