Final answer:
Power is accomplished by either increasing the resistance as in progressive strength training or increasing the velocity with which a load is moved. The correct answer is B. Resistance; Speed (velocity).
Step-by-step explanation:
Power in physical fitness and strength training is accomplished by either increasing the resistance, as in progressive strength training, or increasing the speed with which a load is moved (or velocity).
Therefore, the correct answer is B. Resistance; Speed (velocity). For effective strength training, it's essential to increase the intensity of the exercise, which usually means lifting heavier weights over time to challenge the muscles
. As muscles adapt to a heavier load, they grow larger and stronger. This adaptation process is known as hypertrophy, where there is an enlargement of muscle fibers, facilitated by the increase of structural proteins.
Another factor in increasing power is the speed at which exercises are performed. Moving a weight quickly, with control, requires significant power and engages fast-twitch muscle fibers, which are essential for explosive movements. In sports and activities requiring power, training often focuses on both lifting heavier weights (resistance) and moving them rapidly (velocity) to maximize effectiveness.