Download - Plan for Week 7 (Oct 5 & 7)
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Plan for Week 7 (Oct 5 & 7)
Tuesday- Review exam- Review powerpoint on resistive exercise equipment
Thursday- Visit rec center- Derek Walters, Associate Director
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Cost of Aerobic Exercise Equipment at Rec Complex
Stationary Bicycles- Uprights $1436-$2471- Recumbents $1798-$3634
Treadmills $4695-$7995 Rowers $680 Stepping machines $1779-$3199 Elliptical $2850-$4000 Cybex Arc Trainer ($4600.00) LifeFitness CrossTrainer ($3995.00) SciFit Total Body
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Methods for Resistive Equipment Selection
Apply relevant scientific principles to evaluate claims- Biomechanical- Physiological- Psychological- Use it yourself at conferences or health clubs
Product reviews in fitness magazines (Club Industry, Athletic Business, Fitness Management)
Try it yourself and take a tall or short person with you Consult with experts who supervise its use, or other
professionals (e.g., professors in area of expertise) Look at research available, if any Evaluate quality of research
- Who sponsored research?- Peer-reviewed presentation?
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Relevant Questions for Resistive Equipment Selection (Criteria)
Can you apply specificity principles appropriately?- Type of contraction, movement pattern, speed- Carryover to living in gravitational environment?
Is resistance enough to accomodate your strength? Does it fit different sized people? Is it safe? Is it uncomplicated to use (user friendly) Is there scientific evidence to support manufacturer’s claims? Does the equipment follow a normal neuromuscular pattern? If variable resistance, does resistance follow normal strength-
position curve? Does it have motivation-enhancing features?
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Resistive Exercise Equipment Simple and handy devices (plastic bottles, rubber tubing,
springs)- adv - cheap, convenient- disadv - no versatility in direction, force, speed
Constant resistance training devices (free wts, body wt) - adv – convenient to use, cheap, balance needed, portable, motivation - disadv - safety, inconvenient to change wts, no versatility indirection,
speed Gravity-dependent resistance machines (circular pulleys)
- adv - safety, convenient to change wts, versatility in force direction, motivation
- disadv - cost, balance not required
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Gravity-dependent Resistance Wt Machine
Concentric and eccentric contraction of agonists only!
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Resistive Equipment (cont’d)
Variable resistance wt machine (CAMS or roller on bar)- adv - variable resistance as well as direction of force app,
motivation- disadv - cost, no versatility in speed
Isokinetic devices (same speed)- Adv - speed specific, vary force during movement (great for
rehab) - Disadv - motivation, cost
Computer-assisted devices (can control either speed or resistance) - adv - variable resistance & speed, motivation, permanent record - disadv - cost
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Variable Resistance
Weight Machine
Concentric and eccentric contraction of agonists only!
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ComputerizedExercise Machine
Agonists and antagonists Concentric contraction only!
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Pneumatic Resistance(air, two-way)
Agonists and antagonists Concentric contraction only!
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Isokinetic (accomodating) Resistance (one-way)
Agonists concentric contraction only!
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Hydraulic Resistance
Agonists and antagonists Concentric contraction only!
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Elastic Resistance
Bowflex: Soloflex:
Agonists only, concentric & eccentric contraction
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Exercise Equipment of Questionable Value
Devices to vibrate, melt, or massage away fat Stretching, pulling, or pushing devices Wearing or carrying weights Rebounders or minitrampolines - Exerlopers
- Exerlopers Fitness Systems - Home Page Healthrider:
- Fitness Equipment: Index Gazelle, or healthstrider:
- Fitnessquest home page Electrical stimulation
- Electrical Muscle Stimulator
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Websites for Abdominal Exercise Equipment
Ace Home Page
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Abdominal Muscle Review
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Situp Exercises:
Which methods arePotentially harmful?
In what way?
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Costs of Resistive Equipment at Rec Center
Free weights- Benches $660; dumbbell set $1,300; Rack for dumbbells
$585; Olumpic weight set $1,650 Plate loaded weight machines - $1,500-$1,700 VRI station (variable resistance one axis) - $1,700-
$3,900 VRII station (variable resistance, 2 axes) - $2,300-
$4,000 Isokinetic (accomodating resistance) - $10,000 Computer-controlled - $20,000