Athletes use a combination of strength training, diet, and nutritional supplementation to induce muscle hypertrophy. Muscle hypertrophy involves an increase in size of skeletal muscle through a growth in size of its component cells. Two factors contribute to hypertrophy: sarcoplasmic hypertrophy, which focuses more on increased muscle glycogen storage; and myofibrillar hypertrophy, which focuses more on increased myofibril size.
CD media. Compact discs hold 700MB of data (equivalent to 80 minutes of audio, hundreds of high-quality digital images, and small video files). Unlike DVDs, CDs are not yet available in double-sided or dual-layer formats.
Digital video disk (DVD). An optical disk that holds approximately 28 times more information than a CD. A DVD is most commonly used to hold full-length movies. Compared with a CD, which holds approximately 600 megabytes, a DVD has the capacity to hold approximately 4.7 gigabytes. Also called a digital versatile disk.