Chapter 5 Flashcards
Most distinct gender difference in thermoregulation
sweating
Women and sweat (2)
women sweat less, start to sweat at higher core and skin temps
Heat tolerance in men vs women
women have similar heat tolerance to men of the same aerobic fitness level
Body temp resulting in cellular death
113 degrees F
increase in plasma volume can be observed …
within 1 hour of recovery from 1st exercise session
plasma volume can increase to% in the 2 weeks of trainin
12 to 20%
Physical performance advantage of reduced blood viscosity
enhanced oxygen delivery to the active skeletal muscles because blood flow more easily through the vessels including the capallaries
Part of the heart enlarged with endurance training
left ventricle - responsible of propulsion of blood through arteries
Blood flow increases within _ of training
1 hour of recovery from 1st training session
Advantage of reduced blood viscosity
enhances oxygen delivery to skeletal muscle b/c blood flows easier through capillaries
Left ventricle wall thickness increases due to
resistance training - afterload
Left ventricle cavity increases in size due to
increase in plasma volume and diastolic volume
a-vO2 difference in trained individual
lower mixed venous oxygen content - greater oxygen extraction and distribution at tissue level
Resting heart rate decreases _BPM
10 BPM
Submaximal heart rate decreases _BPM
10-20 BPM
Increase in mitochondria size and #
2
enhances muscle’s ability to use oxygen and produce ATP via oxidation.
Has a glycogen sparing effect - use fat for fuel
decreased secretion at rest and and at the same absolute exercise intensity after training
Response to endurance training: epinephrine and norepinephrine
slight elevation during exercise to preserve blood glucose (stimulates FFA mobilization
Response to endurance training: cortisol
increased insulin sensitivity
Response to endurance training: Insulin
smaller increase in glucose levels during exercise
Response to endurance training: glucagon
no effect on resting values, less dramatic rise during exercise
Response to endurance training: growth hormone
DOMS associated with
tissue injury from eccentric force
Hypertrophy result of:
4
myobibrils, actin, myosin, sarcoplasm - increase in muscle protein systhesis