Week 9 Flashcards
Aerobic System
- Primary energy supplier for body at rest and low intensity lasting longer than 3 minutes
- Oxidative system or mitochondrial respiration/Krebs cycle
- CHO and lipids as fuel source
- amino acids - as last ditch effort for fuel
Chronic Adaptations to Aerobic Training
- Cardiovascular: increased maximal CO, SV and reduced HR at rest
- Respiratory: more efficient oxygen delivery through increased tidal volume, breathing frequency
- Neural: greater efficiency of synergistic muscle activation, better locomotion
- Muscular: increased aerobic capacity of the given musculature
- Bone and connective tissue: Stimulation of bone growth, thicker cartilage at weight bearing joints
- Endocrine: Increase in hormonal circulation and changes at the receptor level
long aerobic training
1-2 times per week
race distance or longer
70% of VO2max
Tempo aerobic training
1-2 times per week
20-30 min
at the lactate threshold
Interval aerobic training
1-2 times per week
3-5 minutes (1:1 ratio)
Close to VO2max
Fartlek
1 time per week
20-60 minutes
varies between LSD and pace/tempo training intensity
Repetition aerobic training
1 time per week
30-90 seconds (1:5 ratio)
greater than VO2max
Zone 1
AEROBIC CAPACITY
- 80-98%
- 60-70 HR
- somewhat hard RPE
- 1:2 or 1:1 work to rest ratio
Zone 2
AEROBIC POWER
- 70% Aerobic
- 70-80 %HR
- Hard RPE
- 1:3 to 1:1 rest ratios
Anaerobic Glycolytic System
- Supplies energy to the body via the breakdown of carbohydrate (Glycolysis)
- Can be used as a primary energy source for exercise between 30 sec and 3 minutes depending on intensity
ATP-PCR system
- Used to fuel intense, short term activities
- One step equation, fastest rate of energy production
- Phosphocreatine breakdown
Evaluating Maximal Aerobic Power
- VO2max: the body’s ability to supply oxygen to the muscles
- O2 consumption “cut off” point
- VO2 max/aerobic endurance correlation
Resting heart rate
- Measured in beats per minute
- Heart work at rest or limited activity
- influential factors: genetics and fitness level
Aerobic threshold HR
HR level at which anaerobic metabolism begins to increase 60-65% of HRmax
Lactate Threshold
Point where blood lactate concentration surpasses 1 mmol
- In trained individuals efficiency of movement results in delayed accumulation
- Better indicator of aerobic performance
- related to max lactate steady state