The study will explore the effects of a 6-week phospholipid drink intervention on the cognitive performance and physiological and subjective stress parameters of males following a repeated psychosocial/physical stressor.
The study conforms to a randomised, double-blind, placebo controlled, parallel groups design examining cognitive performance and physiological/subjective stress responses after a psychosocial/physical stressor before and after a six week daily intake of an phospholipid containing drink vs. placebo. The study will examine: Cognitive performance following acute stress prior to, and following 6-weeks intake of a phospholipid containing drink or a placebo analogue. Physiological and subjective stress responses following acute stress prior to, and following 6-weeks intake of a phospholipid containing drink or a placebo analogue
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
QUADRUPLE
Enrollment
54
Participant in an intervention parallel group will consume a drink with added phospholipids
Participant in an intervention parallel group will consume a drink without added phospholipids
Human Appetite Research Unit, University of Leeds
Leeds, West Yorkshire, United Kingdom
Cognitive performance change from baseline
Performance on a cognitive test battery at baseline will be compared to performance at week 6
Time frame: Week 1 (baseline) and week 6
Salivary cortisol change from baseline
Salivettes will be used to collect salivary cortisol response across exposure to a laboratory stress protocol on two occasions separated by 6 weeks
Time frame: Week 1 (baseline) and week 6
Blood pressure (systolic/diastolic) change from baseline
An ambulatory blood pressure monitor will be used to collect blood pressure response profiles across exposure to a laboratory stress protocol on two occasions separated by 6 weeks
Time frame: Week 1 (baseline) and week 6
Heart rate change from baseline
An ambulatory blood pressure monitor will be used to collect heart rate response profiles across exposure to a laboratory stress protocol on two occasions separated by 6 weeks
Time frame: Week 1 (baseline) and 6 weeks
Subjective stress change from baseline
The Stress and Arousal Checklist (Mackay, 1978)will be used to collect subjective stress response profiles across exposure to a laboratory stress protocol on two occasions separated by 6 weeks
Time frame: Week 1 (baseline) and 6 weeks
Subjective mood change from baseline
The Profile of Mood States (Mc Nair et al., 1971)will be used to collect subjective mood response profiles across exposure to a laboratory stress protocol on two occasions separated by 6 weeks
Time frame: Week 1 (baseline) and 6 weeks
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