Date of Award
2008
Degree Type
Thesis
Degree Name
Master of Science
Program
Kinesiology
Supervisor
Dr. Greg D. Marsh
Second Advisor
Dr. John M. Kowalchuk
Third Advisor
Dr. Greg D. Marsh
Abstract
Eight male subjects performed moderate- and heavy-intensity plantar-flexion exercise in both a control (CON) and NH4CI ingestion (ACID) trial. Intracellular 11 metabolism was examined using P-magnetic resonance spectroscopy. During the middle and late stages of heavy-intensity exercise, ACID resulted in a lower (P<0.05) intracellular pH (middle: ACID 6.63 vs. CON 6.70; late: ACID 6.64 vs. CON 6.70). Phosphocreatine [PCr] (P<0.05) was lower in ACID during the early [ACID 18.14 vs. CON 20.40 mmol/1] and middle [ACID 14.12 vs. CON 16.73 mmol/1] stages of heavy- intensity exercise. ACID did not affect the magnitude of the PCr slow component [ACID 2.7 vs. CON 4.0 mmol/1] (P>0.05). Fundamental phase PCr breakdown kinetics demonstrated greater amplitude (P<0.05) during heavy-intensity exercise in ACID [ACID: 14.54 vs. CON: 11.31 mmol/1] with no difference in the time constant. In summary, NH4CI ingestion increased PCr breakdown during heavy-intensity exercise with no affect on the PCr slow component.
Recommended Citation
Churchward-Venne, Tyler A., "EFFECTS OF NH4CI INGESTION ON PHOSPHOCREATINE METABOLISM DURING MODERATE- AND HEAVY-INTENSITY PLANTAR-FLEXION EXERCISE" (2008). Digitized Theses. 4197.
https://ir.lib.uwo.ca/digitizedtheses/4197