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Two weeks of high-intensity aerobic interval training increases the capacity for fat oxidation during exercise in women.
- J. Talanian, S. Galloway, G. Heigenhauser, A. Bonen, L. Spriet
- Chemistry, MedicineJournal of applied physiology
- 1 April 2007
It is shown that seven sessions of HIIT over 2 wk induced marked increases in whole body and skeletal muscle capacity for fatty acid oxidation during exercise in moderately active women.
Repeated transient mRNA bursts precede increases in transcriptional and mitochondrial proteins during training in human skeletal muscle
- C. G. Perry, J. Lally, G. Holloway, G. Heigenhauser, A. Bonen, L. Spriet
- Biology, MedicineThe Journal of physiology
- 1 December 2010
The training‐induced increases in transcriptional and mitochondrial proteins appear to result from the cumulative effects of transient bursts in their mRNAs, and training-induced mitochondrial biogenesis appears to involve re‐modelling in addition to increased mitochondrial content.
Metabolic, catecholamine, and exercise performance responses to various doses of caffeine.
The results are not compatible with the traditional theory that caffeine mediates its ergogenic effect via enhanced catecholamines, and only the highest dose of caffeine resulted in increases in glycerol and free fatty acids.
Caffeine ingestion and muscle metabolism during prolonged exercise in humans.
- L. Spriet, D. MacLean, D. Dyck, E. Hultman, G. Cederblad, T. Graham
- Chemistry, MedicineThe American journal of physiology
- 1 June 1992
The results indicate that Caf before exercise decreased muscle glycogenolysis by approximately 55% over the first 15 min of exercise at approximately 80% VO2max, indicating that a "spared glycogen" was available late in exercise and coincided with a prolonged time to exhaustion.
Performance and metabolic responses to a high caffeine dose during prolonged exercise.
The present study examined whether a high caffeine dose improved running and cycling performance and altered substrate metabolism in well-trained runners and found that it had no effect on respiratory exchange ratio or plasma free fatty acid data at rest or during exercise.
Regulation of skeletal muscle glycogen phosphorylase and PDH during maximal intermittent exercise.
- M. Parolin, A. Chesley, M. Matsos, L. Spriet, N. Jones, G. Heigenhauser
- Biology, MedicineAmerican journal of physiology. Endocrinology and…
- 1 November 1999
The increase in H+ concentration may have served to reduce pyruvate production by inhibiting Phos transformation and may have simultaneously activated PDH in the third bout such that there was a better matching between pyruVate production and oxidation and minimal lactate accumulation.
IOC consensus statement: dietary supplements and the high-performance athlete
- R. Maughan, L. Burke, +22 authors L. Engebretsen
- Medicine, PsychologyBritish Journal of Sports Medicine
- 1 March 2018
The appropriate use of some supplements can benefit the athlete, but others may harm the athlete’s health, performance, and/or livelihood and reputation and expert professional opinion and assistance is strongly advised before an athlete embarks on supplement use.
High-intensity aerobic interval training increases fat and carbohydrate metabolic capacities in human skeletal muscle.
- C. G. Perry, G. Heigenhauser, A. Bonen, L. Spriet
- Chemistry, MedicineApplied physiology, nutrition, and metabolism…
- 22 November 2008
This study demonstrated that 18 h of repeated high-intensity exercise sessions over 6 weeks (3 d.week-1) is a powerful method to increase whole-body and skeletal muscle capacities to oxidize fat and carbohydrate in previously untrained individuals.
Intramuscular triacylglycerol utilization in human skeletal muscle during exercise: is there a controversy?
It is contention that the muscle biopsy, isotope tracer, and (1)H-MRS techniques report significant and energetically important oxidation of free fatty acids derived from IMTGs during prolonged moderate exercise.
Sweat rate, salt loss, and fluid intake during an intense on-ice practice in elite Canadian male junior hockey players.
Examination of pre-practice hydration, on-ice fluid intake, and sweat and sodium losses of Canada's junior men's hockey team found that elite junior hockey players incurred large sweat and Sodium losses during an intense practice, but 2/3 of players drank enough to minimize body mass loss.