Increased Muscle Use- Endurance

what happens to the vascular supply (capillaries) in skeletal muscle with endurance training?

what happens to the vascular supply (capillaries) in skeletal muscle with endurance training?

the supply increases to bring oxygen to the muscles

What types of muscle fibers have the larges diffusion distance (from capillaries)

type II (fast)

are human muscles heterogeneous or homogeneous

heterogeneous

what type of fibers are predominant in muscles that hold us up against gravity?

Type Ia or IIa

what adaptions occur due to low frequency, long duration muscle stimulation

more efficient oxygen transportation (increased mitochondria, mitochondrial enzymes, capillaries, and decreased diffusion distance)

Energy source for strength/power activities, already ready to be utilized but only lasts for about 3 seconds

ATP

Creates ATP form ADP fro sustained power, last for around 10 seconds

ATP+ PCr

Energy for anaerobic power/endurance, around a minute and a half into activity

ATP+ PCr+ glycolysis

what exercise capacity drives muscle endurance changes?

low to moderate

When is ATP+ PCr+ glycolysis + Beta Ox/ TCA/ Ox Phos / ETC used?

aerobic endurance typically activity greater than 3 minutes, relies on fatty acids for longer activity

adaptations to low load long duration exercise in humans

increased maximal oxygen uptake, increases enzymes, increased mitochondria, increased capillaries, increased myoglobin, decreased CSA

are type IIX fibers recruited during low load long duration exercise?

no

does high-intensity interval training drive endurance adaptations in muscles?

yes but not to the extent that endurance trining does

does systemic change occur if only localized endurance training is performed?

no, whole body mass must be involved to drive adaptation in the heart and lungs