Dietary Supplements, Heart Rate/Drug Effects, Lactic Acid/Metabolism, Physical Education and Training/Methods, Wheelchairs
Conditions
Keywords
caffeine, sodium citrate, exercise performance, wheelchair athletes, 1500m
Brief summary
A positive ergogenic effect of sodium citrate and caffeine ingestion in a short-term, high-intensity exercise task was shown by several studies. These studies were conducted with healthy, able-bodied subjects. The aim of the study is to investigate whether caffeine or sodium citrate ingestion could enhance performance in spinal cord injured wheelchair athletes. It is a double blind, placebo controlled and randomized study.
Detailed description
The athletes have to complete four 1500m tests on a training roller. Before each treatment they get different supplementations. Once they get sodium citrate and a placebo, once caffeine and a placebo, once sodium citrate and caffeine and for the fourth treatment they get twice a placebo. Two hours after starting with the supplementation they have to complete the 1500m as fast as possible. Time to complete 1500m, blood pH, plasma bicarbonate, sodium concentration, heart rate, oxygen consumption, blood lactate concentration and rate of perceived exertion (RPE) were measured.
Interventions
DIETARY_SUPPLEMENTCaffeine
gelatine capsule 6mg/kg bodyweight 60min prior test
DIETARY_SUPPLEMENTSodium Citrate
0.5g/kg bodyweight diluted in 7dl water ingested 120-90min prior test
DIETARY_SUPPLEMENTMannitol
gelatine capsule filled with mannitol (100mg per capsule) ingested 60min prior test
DIETARY_SUPPLEMENTSodium Chloride
sodium chloride diluted in 7dl water 0.045g/kg bodyweight 120-90min prior test
Sponsors
Swiss Paraplegic Research, Nottwil
Study design
Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes
Inclusion criteria
* wheelchair athletes * national team * category T53 and T54
Exclusion criteria
* medicated * pregnant (for women) * cardiovascular and respiratory diseases
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Time | 3 weeks | Time to complete 1500m |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Lactate Concentration | during the 3 weeks study phase | 1min before starting the warm up, 15s after the end of the warm up, 15s after completing the test, 2min/4min/6min/8min/10min after the test |
| blood pH, sodium concentration and plasma bicarbonate | during the 3 weeks of study phase | 1min before starting with the ingestion of the fluid, immediately before starting the warm up, just immediately before starting the 1500m test. |
| Heart Rate | during study phase of 3 week (4 tests) | Heart Rate measured from 2min before the test until 5min after the 1500m-test. |
| rating of gastrointestinal stress | during the 3 weeks of study phase | 1min before starting to drink the fluid, 2min before starting with the warm up, 2min before the test and 2min after having completed the 1500m |
| Rating of Perceived Exertion (RPE) | during the 3 weeks of study phase | 15s after the end of the warm up, 15s after having completed the 1500m |
| Oxygen Consumption | during 3 weeks of study phase | oxygen consumption (VO2(ml/min/kg), VCO2(ml/min), RER (VCO2/VO2)) starting of the measurement is 2min before the start of the 1500m and ends 2min after having completed the 1500m |
Countries
Switzerland
Outcome results
None listed