BIOMECHANICS APPLICATIONS

1
Sport Specific Muscle Hypertrophy Shoulder
Extensors 2002 World ChampWomens 50m
Backstroke
2
Eccentric Training

• greater tension than concentric
• greater muscle soreness than concentric
• no more effective than concentric
• important for training braking action of muscles

3
Plyometrics

• Stretch muscle then quickly contract muscle
• first eccentric then concentric contraction
• safety considerations
• 1. physical age of performer
• 2. strength of performer
• 3. resilient surface and cushioned footwear
• 4. rebound height no more than 20cm

4
POWER

• ability to contract forcefully with speed
• ability to continue to produce high force as the
  velocity of muscle contraction increases
• speed dominant power --gt run,jump,throw
• strength dominant power --gtlift,push,pull
• 33 of 1RM at 33 of max. speed muscle

5
POWERMuscle Girth not a good indicator
6
Local Muscle Endurance

• ability of muscle to contract at a given level of
  intensity for either
• 1. a specific number of repetitions
• 2. a period of time
• trained via
• 1. using more than 6RM per set multiple sets
  
• 2. keeping reps constant but increasing load
• 3. speed endurance work (hold fast tempo)

7
ACTIVE Flexibility

• ROM due to internal torques
• usually smaller ROM than Passive Flexibility

FIG 8.9bpage 266
8
PASSIVE Flexibility

• ROM due to external torques
• usually Larger ROM than Active Flexibility

FIG 8.9a and FIG 8.10pages 266 267
9
Factors Limiting Flexibility

• Connective Tissue muscle,tendons,ligaments,fascia
  
• Bone Configuration
• Tissue Contact with adjacent segments
• Restrictive Clothing
• Inactivity

10
Stretching Methods

• 1. Dynamic/Ballistic
• uses momentum to extend joint ROM
• 2. Slow/Static
• passive stretch from 6 to 30 seconds long
• 3. PNF - Proprioceptive Neuromuscular
  Facilitation
• see Figure 8.11 on page 270

11
FIG 8.11page 270 try this with a classmate
12
THATS ALL THERE IS HERE

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