Exercise Modes For Strength Flashcards
4 factors of muscle performance
- Fiber type
- Fiber diameter
- Recruitment (size principle)
- Muscle size
Type I = _________ = __________
Slow twitch - oxidative
Type IIA = __________ = __________
Fast twitch - oxidative
Type IIB/X = ___________ = __________
Fast twitch - glycolytic
Explain fiber diameter as it relates to oxidative/glycolytic pathways
Smallest - slow ox
Intermediate - fast ox
Largest - fast glyco
Recruitment order of muscle fibers
I –> IIA –> IIB/X
Hypertrophy can be obtained by training at ________ of max force generating capacity
60-70%
Hypertrophy increases these two muscle characteristics
- Cross sectional area
2. Force production
Long distance runners fiber type percentage
60-70% type 1
Sprinters fiber percentage
80% type II
Evidence of shift from __________________ and vice versa
Type IIx - type IIA
Is it possible to shift from type I to type II?
Limited studies of shift
Explain the force velocity relationship
Small load: muscle inc speed of shortening
High load: muscle slows speed of shortening
A muscle’s capacity to produce force depends on its __________. What relationship does this explain?
Length
Length-tension
Sarcomeres in series are arranged for
Velocity
Sarcomeres in parallel are arranged for
High force
What is responsible for early increases in strength?
Neuro recruitment and adaptation
2 systems that lead to muscle fatigue
CNS
Cross-bridges
What happens to muscle performance at puberty?
5 fold increase for males; 3.5 for women
When do women/men peak?
Early 20s; by 30
Strength declines _______/year, then accelerates at what age?
1%, 50yo
In 60s/70s, strength declines ______%, then ___% per decade
15-20%
30%
3 drugs that negatively modify muscle performance
Alcohol
Corticosteroids
Anabolic steroids
Cardiopulmonary fatigue =
Body is no longer able to utilize O2 normally
Local vs general muscle fatigue
Local - muscle
General - cardiopulmonary
3 types of isometric exss
Muscle-setting
Stabilization exercises
Multiple angle isometrics
Define muscle-setting
Low-intensity, isometric contraction performed against little to no resistance
Ex: quad set
Purpose of muscle-setting
Decrease atrophy NOT improve strength
Purpose of stabilization exss
Develop a submax but sustained level of co-contraction
Multiple-angle isometrics
Resistance is applied at multiple joint positions within available ROM
5 indications for isometrics
- Minimize atrophy
- Promote neuromuscular control while protecting ST or joint
- Postural or jt stability
- Develop static muscle strength at specific ranges
- Improve muscle strength when dynamic mvmt is not recommended
When are isometrics most effective?
During acute or early stage of recovery/training
In isometric exss, we want pt to be able to generate what % of max voluntary muscle action?
60-100%
Where does strength increase post performing isometric exercises?
ONLY at specific joint angle with overflow to 10º in each direction
Where do we want to apply resistance for isometric exss?
At least every 20º through allowable ROM
2 precautions for isometrics
- Apply/release gradually
2. Valsalva
BRIME
Brief repetitive isometric exercise
6-10 sec contraction followed by double the time of rest - repeat until fatigue
Exercise in which movement occurs at a constant speed and the muscle generates max force at all points of the ROM
Isokinetic exercise
Slow speed for isokinetic exss
30-60º/sec
Medium speed for isokinetic exss
60-180º/sec
Fast speed for isokinetic exss
180-300+º/sec
Average angular velocity of walking =
220-240º/sec
Explain isokinetic/velocity spectrum rehabilitation process
Assessment at 3 speeds - slow to fast
30 sec bouts at different speeds, rest between bouts x3
Isotonic is better for:
Isokinetic is better for:
Isotonic: initial strengthing
Insokinetic: later in rehab process
Isokinetics accomodate for
Fatigue and painful/weak arc
Main limitation of isokinetics
Single-plane movements - NOT FUNCTIONAL
Define isotonic
Equal resistance - tension remains unchanged with joint movement
Lowest level of intensity for dynamic resistive exercises
AROM
To gain strength, the load should exceed the muscle’s _______________
Metabolic capacity
Formula for power
Work(forcexdistance)/time
Speed is manipulated more than force
The load cannot be great than what the muscle can control at…….
Its weakest point in the ROM
3 pt status elements to consider with resistance training
Health
Stage of recovery
Age
4 indications that you need to revise site or amt of resistance
- Pt can’t complete desirable ROM
- Application site is painful
- Tremors
- Substitutions
3 contraindications to resistance training
- Unavoidable pain
- Acute inflammation
- Severe cardiopulmonary disease
3 principles of resistance exss (review)
- Overload
- Specific adaptation to imposed demands (SAID)
- Reversibility
Training can be initiated with the % of the RM in what range of the 1RM?
30-80%
Delorme technique
10 reps at 1/2 10RM
10 reps at 3/4 10RM
10 reps at full RM
Oxford technique
10 reps at full 10ROM
10 reps at 3/4 10RM
10 reps at 1/2 10RM
DAPRE technique
1: 10 @ 50%
2: 6 @ 75%
2: AMAP @ 100%
4. AMAP @ adjusted from 3rd set