Healthy
Conditions
Brief summary
The objective of the study is to evaluate the effects a complex recovery intervention during the breaks of a repeated sprint test on exercise performance compared to placebo and control conditions. The enhanced recovery package (ERP) includes neck cooling with an iced gel pad, drinking a 6% CHO solution, mouth-rinsing with a 10% CHO, 6 mg･kg -1 caffeine solution, performing submaximal squats and hyperventilating a hyperoxic mixture; all applied in each 3-min break in-between the six 30-s sprints. This intervention will be compared to a placebo and a control condition.
Interventions
OTHERERP
The ERP intervention is applied in a randomized and counter-balanced order across visits 2-4 in each 3-min break in-between the six 30-s sprints, with one intervention per visit. The order and timing of the constituents of the interventions will be strictly constant within and between participants. ERP: 1) neck cooling with an iced gel pad, 2) drinking a ∼ 6% CHO solution, 3) mouth-rinsing with a ∼10% CHO, ∼6 mg ･ kg -1 caffeine solution, 4) performing submaximal squats and 5) hyperventilating a hyperoxic mixture
OTHERPlacebo
The control intervention is applied in a randomized and counter-balanced order across visits 2-4 in each 3-min break in-between the six 30-s sprints, with one intervention per visit. The order and timing of the constituents of the interventions will be strictly constant within and between participants. 1\) neck cooling with room temperature gel pack, 2) drinking an artificially sweetened solution, 3) mouth-rinsing with artificially sweetened solution (containing no caffeine), 4) performing unloaded squat manoeuvres, 5) deep breaths with room air
Sponsors
Swiss Federal Institute of Technology
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
SINGLE (Subject)
Masking description
Participants will be blinded about the true nature of the placebo intervention
Intervention model description
Each participant will be tested on 4 different days with a control, a placebo and an interventional condition in random order.
Eligibility
Sex/Gender
MALE
Age
18 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Informed Consent as documented by signature (Appendix Informed Consent Form) * Healthy * Male * Age: 18-40 years * Body-Mass-Index (BMI): 18.5-24.9 kg･m-2 * Trained individuals: max. Power output ≥ 4.0 Watts･kg-1 * Non-smoking * Willingness to adhere to the study rules
Exclusion criteria
* Known or suspected non-compliance, drug or alcohol abuse * Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participants * Previous enrolment into the current study * Intake of medications affecting performance or the respiratory, cardiovascular or neuromuscular system * Acute or chronic illness affecting performance or the respiratory, cardiovascular or neuromuscular system
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in mean power output | through study completion, an expected average of 3 weeks per participant | Measured over the six 30s high-intensity cycling sprints in each of the three conditions. Mean power mirrors the body's ability to generate muscle power and physical energy. Any meaningful effects of the recovery interventions will eventually translate into a higher power output. |
| Change in fatigue index | through study completion, an expected average of 3 weeks per participant | Fatigue index = drop in power output from the beginning to the end a 30s sprint test. The change in this index will be calculated from the 1st to the 6th sprint test in each condition. |
Countries
Switzerland
Outcome results
None listed