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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
9
gelatine capsule 6mg/kg bodyweight 60min prior test
0.5g/kg bodyweight diluted in 7dl water ingested 120-90min prior test
gelatine capsule filled with mannitol (100mg per capsule) ingested 60min prior test
sodium chloride diluted in 7dl water 0.045g/kg bodyweight 120-90min prior test
Swiss Paraplegic Centre
Nottwil, Canton of Lucerne, Switzerland
Time
Time to complete 1500m
Time frame: 3 weeks
Heart Rate
Heart Rate measured from 2min before the test until 5min after the 1500m-test.
Time frame: during study phase of 3 week (4 tests)
Lactate Concentration
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
Time frame: during the 3 weeks study phase
blood pH, sodium concentration and plasma bicarbonate
1min before starting with the ingestion of the fluid, immediately before starting the warm up, just immediately before starting the 1500m test.
Time frame: during the 3 weeks of study phase
Oxygen Consumption
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
Time frame: during 3 weeks of study phase
rating of gastrointestinal stress
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
Time frame: during the 3 weeks of study phase
Rating of Perceived Exertion (RPE)
15s after the end of the warm up, 15s after having completed the 1500m
Time frame: during the 3 weeks of study phase
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.