RubusElite Efficacy Testing of a Novel High Protein, Berry Polyphenol Enriched Dairy Beverage

This study will take the form of a 3-arm single blind parallel proof-of-concept RCT with two arms acting as active intervention arms and the third acting as a control arm. Prospective participants will be provided with a participant information sheet and informed consent form prior to any involvement in the protocol. It will be made clear to participants from the outset that their involvement in this study is entirely voluntary and they will be free to withdraw from the study at any point without having to provide any reason or explanation and without any risk of repercussions, either direct or indirect. Participants will receive a signed copy of their informed consent forms for their records. Once an initial interest has been expressed by a volunteer, they will be invited to complete an initial Eligibility Screening Form to assess their initial eligibility. If successful in meeting the initial criteria, participants will then be invited to the Human Performance Laboratory at WIT for an initial screening visit. Upon arrival to the laboratory participants will be provided with an opportunity to ask questions related to the information provided in the information sheet followed by signing the informed consent form. During the screening visit participants will be required to fill out a readiness to exercise form to ensure they are in adequate health to perform maximal exercise of the VO2peak test (Appendix 4). Once all inclusion and exclusion criteria are met and the participant is happy to proceed with their involvement in the study, they will then be scheduled to return to the laboratory to complete a baseline visit. During the baseline visit participants will provide a series of baseline fasted biological samples, alongside baseline psychological assessments and undertake a baseline 15km cycling time trial performance test.

Participants will be randomised to their assigned intervention arm at the end of their baseline visit and will be provided with a six-day supply of their randomised treatment beverage and will be instructed to consume two servings per day of this beverage (RubusElite beverage, high protein milk or low protein milk) for the following six days. On day 7, participants will return to the Human Performance Laboratory to complete a 'test exercise day' where they will undergo a repeat 15km cycling time trial performance test followed by a bout of unaccustomed drop-jump exercise consisting of 100 repetitions total. Participants will then be provided with a further 3-days of their treatment beverage and requested to return to the Human Performance Laboratory at 24h and 48h post-'test-exercise day' for follow-up assessment. Participants will also receive a 72h follow up phone call from the research team in order to assess muscular recovery post EIMD induction. Participants will be made aware that this call marks the end of their study participation, they will be thanked for their attendance and contribution to this research and will be notified of the overall study findings as soon as they are available.

This study will be conducted in accordance with Good Clinical Practice protocols, the research team will be appropriately qualified with sufficient training on such.

Inclusion criteria

• Between 18-45 Years of age • VO2peak between 35ml/kg/min and 55/ml/kg/min

Exclusion criteria

• Inability or unwillingness to discontinue use of any nutritional supplement or nutraceutical that may impact performance or recovery

• Have an ongoing injury which will impact their ability to exercise, or a history of landing related lower limb injury
• Being unwilling to consume a dairy product
• Any diagnosis of a psychiatric disorder or taking any anti-psychotic, anxiolytic or anti-depressant medication
• Any use of antibiotic medication within the previous two months or current use of prebiotic or probiotics.
• Any diagnosis of chronic coexisting illness [cardiovascular, gastrointestinal (GI) [to include functional GI disorders, inflammatory bowel disease, coeliac disease, lactose intolerance]
• Have a history of international sporting competition, or recent plyometric training