KIN202 L6

wingate test

-requires 30 seconds of all out effort

-WR is relative to body mass (0.075 x body mass)

information derived from wingate test

-peak power output

-mean power output

-fatigue index

-anaerobic capacity

power output equation

fatigue index

ATP supply in Wingate

-mostly anaerobic

-supramaximal

ATP changes following wingate

-we cannot match ATP supply and demand

-[ATP] goes down

IMP changes following wingate

-no removal pathway

-[IMP] increases

glycogen changes following wingate

- ~25% decrease

-use for glycolysis in exercise

lactate changes following wingate test

-intramuscular lactate increases throughout test

-peaks after test

cardiovascular responses to wingate test

-match very close to progressive exercise tests

-almost reach VO2max within 30s

post exercise hypotension

-a transient decline in BP following exercise

-primarily due to decrease in vascular resistance caused by vasodilation

who experiences post exercise hypotension

people with hypertension

factors involved in physiological response to resistance exercise

-muscle mass involved

-% 1 RM

-duration

-training status

-tempo

important pathways for ATP production during resistance exercise

-HEPT

-stored ATP

-glycolysis

important pathway during rest period

oxidative phosphorylation

valsalva maneuver

-forceful exhalation against a closed glottis

-instinctive during high-intensity resistance exercise

-contributes to the increase in arterial BP by actively compressing the heart and blood vessels in the chest and abdomen

hemodynamic response to resistance exercise

response increases as exercise intensity increases

skeletal muscle blood flow at rest

-low due to low metabolic demand

-BF matches demand and is steady with no contractions

skeletal muscle blood flow during dynamic exercise

-phasic because of repeated patterns of muscle contractions

-average increases compared to rest with increased metabolic demand

skeletal muscle blood flow in dynamic exercise recovery

-elevated to start, decreases when metabolites are cleared

-steady with no mechanical influence from skeletal muscle

3 phases of skeletal muscle blood flow in dynamic exercise

-steady blood flow at rest phasic blood flow during exercise

-steady blood flow during recovery

blood flow in 5% MVC isometric contraction

-steady and smooth with one sustained contraction

-average increases in proportion to metabolic demand

blood flow in 50% MVC isometric contraction

-steady/ smooth with one sustained contraction

-average does not change substantially from rest due to occlusion of arterioles

BF in isometric 5% MVC recovery

-back down to normal

-small metabolic disturbance

BF in isometric 50% MVC recovery

-matches metabolic demand produced during contraction

-accumulation of metabolites during contraction, released in relaxation

TPR and isometric exercise

-increases despite there being metabolite-induced vasodilation

-contractions compress the mircocirculation

complete occlusion threshold

>30% MVC

blood pressure response to isometric exercise

-with increasing intensity systolic and mean arterial pressures increase

-magnitude of the increase is greater than that observed in subjects during dynamic exercise