1. The statement is TRUE.
Protein contributes minimally to the amount of energy that is expended during strenuous exercises. Protein only contribute about 3 -10% of the total energy used. Proteins are degraded to amino acids for oxidation into energy. Branched chained amino acids are especially preferred for oxidation into energy. Examples of branched chain amino acids include: leucine, isoleucine and valine.
2. B
One of the benefits of leucine to athletes is that leucine stimulates protein synthesis in the muscles. Leucine is also closely associated with the release of gluconeogenic precusors. Consumption of leucine before or during physical exercise has been found to be capable of increasing both mental and physical performance.
Variety is the principle of training that is defined by changing equipment, exercises, and activities to avoid boredom, reduce the risk of overuse injuries, and increase motivation or adherence.
The principle of variety includes ensuring that the training activities use multiple training methods and exercises to increase the rate of interest and motivation for the athlete. Athletes who perform similar activities regularly for a long period might get bored and get discouraged to do it anymore.
For aerobics training, a variety would include changes in the training method, training field and rehearsal timings. It would also include variations within this training so that the continuous training was not always running for over 15 km but also performing cycle races.
To know more about principles of training, refer to the following link:
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Answer:
portuagese :a primeira resposta eu estou supondo, mas não há nenhuma imagem, então eu realmente não sei.
English : the first answer i am guessing but there is no picture so i don't really know.
Explanation:
