cardiovascular training considerations and common injuries Flashcards
routine aerobic exercise can generally increase an individuals VO2 max by
10-30%
genetics account for ___% of the differences in improvements between individuals
50
genetic benefits are associated with
larger stroke volumes
greater concentration type 1 fibers
greater mitochondria and capillary density
higher myoglobin concentrations
more efficient neural and metabolic pathways
healthy, sedentary adults experience a decline of their VO2 max by
1% per year after age 25
attaining higher aerobic fitness during youth helps
prevent the premature onset of functional decline
sedentary, older adults who engage in aerobic activity experience
improvements similar to younger individuals
physiological sex differences account for the ___% disparity between VO2 max measures in adult men and women
15
females have
___ hearts
___ stroke volume
___ hemoglobin concentration
___ muscle mass relative to size
____ body fat values
smaller
lower
lower
less
higher
obesity: lower impact activities will be required in early stages of the exercise program to
avoid orthopedic injuries
the human body cools itself via four methods
radiation
convection
conduction
evaporation
radiation
heat loss into the surrounding air through the skin
convection
heat loss via the movement of cooler air across the skin
conduction
heat loss via direct contact with something colder than the body
evaporation
heat loss via sweat evaporation (derived from blood plasma) that pulls heat away from the body
primary mechanism for thermoregulation in the adult population
evaporation
hot environments make it difficult for the body to lose heat via
radiation, convection, conduction
hot and humid environments limit
evaporation
greatest risk for heat-related illness and severe dehydration
hot and humid
the body acclimates to the increased stress of training in the heat overtime, generally, it takes _____ exposures for adaptations
7-12
physiological adjustments to training in the heat include
earlier onset of sweating
increase in sweat production
distribution of sweat expands across a broader surface
increase in plasma volumes
reduction of sodium concentration in sweat
improvements in cutaneous blood flow, distributing more heat to the skin
improved overall thermoregulatory function
exposure to extreme cold for prolonged periods of time can cause
hypothermia
____ environments are optimal for cardiovascular training
cooler
altitude impacts training performance as the
oxygen concentration in the air is lower