Plan for Tuesday, September 23

Term paper topics and partnering Review hiking boots readings and questions Review running shoes guest presentation Introduce exercise equipment section Reading assignment:

- Ch 11 of text; Baechle; Ch 3; Kreighbaum 2; pp 257-265; Adrian, pp 221-225

- “An Evaluation of Home Exercise Equipment Claims” - Website: SGMA International - Market Reports and Studies

Assignments for Thursday, Sept 25

- Submit 2 questions or concerns from readings for discussion

- Pick up handout on APA format from Library- Check out interlibary loan if you have never used it

before. You are likely to need it to find references for your project.

- Learn how to use the “catnet” search engine

Biom/Phys Considerations for Fit Equip Objectives of most fitness programs are to improve:

- Flexibility, musc strength, musc endurance, C-V end, weight control, & skeletal, or bone fitness

Important conditioning principles: - Progressive overload - Specificity of training

• SAID principle applies to the following– Cellular demands, systemic demands evoke specific responses resulting in

performance (functional) and tissue (structural) adaptations

• Specificity applies to many aspects of the training program, including– Muscle groups, energy system, body position, environmental conditions,

movement pattern, joint position, speed, type of contraction

What is stimulus for improvement of each fitness element? What is the context in which adaptation/improvement is

most desirable?

Biom/Phys Considerations for Fit Equip Remember which aspect of fitness you are working on and

apply the overload and specificity principles appropriately Muscular Strength - ability of segment to exert force (MVC)

- Overload stimulus is tension, so use load <10RM- Factors affecting force application:

• Force-velocity relationship (see slide later)• Strength-joint position relationship (combination of angle of pull and force/length

relationship) (slide later)

- Focus on • fundamental movements – why and what are they• antigravity musculature – why and what?• proportionate development – what’s that?

- Specificity principle applies to body position, speed (type of contraction), ROM, pre-contraction stretch condition, and movement pattern)

Biom/Phys Considerations for Fit Equip (3)

Mucular Endurance- ability to repeat or sustain submaximal contractions- Overload stimulus is work intensity- Use load approx 60% of max strength, or > 10 RM- Focus on fundamental movements, antigravity musculature, and proport.- Specificity principle applies to resistance, body position, speed, cadence, ROM, and

total number of reps Cardiorespiratory Endurance - Aerobic capacity

- Overload stimulus is VO2 max, Cardiac output, or Heart Rate- Repetition and resistance relative to muscular strength/endurance are important- Remember specificity principle regarding gravity, muscles involved

Bone, or skeletal, fitness- Overload stimulus is strain (normalized deformation )

• Remember 4 loading modes (compression, tension, torsion, shear)• Exercise in gravitational environment and emphasize resistive exercises

Flexibility – stretching exercises are not equipment- intensive

Force-velocity Relationship:

Strength-PositionCurves:

Resistance-PositionRelationship:

Remember T = WD + IWhen is acceleration positive?Zero?Negative?

Use of Cams in Ex Equipment:

Sample Resistive Exercise Program Basic Program - required

- Squat with heel raise- Trunk curl (goal is 30 reps)- Bench press- Sit or bent row- Upright press- Pull downs or chins

Optional exercises- Back extension from prone position- Forearm curl- Forearm extension or dips

Note: This program incorporates the principles of bilateral and agonistic-antagonistic balance and focuses on muscular strength and endurance development of the antigravity musculature. At least two sets (one with light weight for warmup), and preferably three sets, of each exercise should be completed at 10-15 RM.

What exercises would you change or add?

Questionable exercises

Hyperextended back Good morning exercise Straight leg deadlift Deep knee bends beyond thighs parallel Behind neck press Unsafe abdominal exercises

Spine loading – one big leg (disc and vertebral body), two smaller legs (facet) in rear. Balance the load

Questionable exercises:Hyperextended back

“Good morning” exercise

Straight-leggedDeadlift:

Behind the neck press:

Squats: It depends onhow you do it!

Situp Exercises:

Which methods arePotentially harmful?

In what way?

Aerobic Exercise Equipment

Purpose - to increase aerobic capacity Most equipment simulates walking, jogging, or running.

- How about swimming?- Why not just do these instead of buying equipment?

Evaluate Efficacy of Each Type of Equipment Below for institutional and personal use (see reference below):- Cross-Country Ski Simulators Chart, p 161)- Stationary Cycles (Chart, p 165)- Treadmills (Chart, p 167)- Rowing Machines (Chart, p 170_- Jump Ropes (Chart, p 171)- Stair Steppers (Chart, p 174)

Burke, Edmund R. (1996) (Ed.) Complete Home Fitness Handbook. Human Kinetics.

http://www.exerstore.com http://www.acefitness.org/

Ski Simulators

Stationary cycle:

Stationary Cycles

Treadmills

Rowing Machines

Stairsteppers

Stairsteppers

Which aerobic exercise mode is best?

Discuss each mode relative to the following criteria- Degree of overload on cardiorespiratory system- Relevance to fundamental movements and ADL’s- Proportion of total body musculature involved- Degree of compressive stress on femoral head and lumbar

vertebral bodies (sites of most osteoporotic fractures)- Compressive stress on patella and knee joint- Range of motion and torque at hip, knee, and lumbar spine- Motivational features (comfort, user friendly, feedback, RPE)- Likelihood of continued usage- Cost- Other?

Methods of Evaluation of Ex Equip Source: (Jung, A.P. The evaluation of home exercise equipment

claims. ACSM’s Health and Fitness Journal. 4(5): 14-16,30-31. Check physiological and biomechanical principles and ACSM standards. Review research, if available

- Critically review research – Are appropriate methods used? Who sponsored it? Where was research reported?

Ask professors or other experts (Barstow, Harms, Gyurcsik, Estabrooks, Ferguson)

Review product reviews in fitness magazines (Club Industry, Athletic Business, Fitness Management)

Try it yourself. Interview professionals who have supervised its use. Design and conduct your own research. Note: guidelines for selection are on Federal Trade Commission

Website (http://www.ftc.gov)

Cost of Aerobic Exercise Equipment at Rec Complex

Skiers $1579-$4771 Stationary Bicycles

- Uprights $1436-$2471

- Recumbents $1798-$3634

Treadmills $4695-$7995 Rowers $680 Stepping machines $1779-$3199 Elliptical $2850-$3600

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 in direction,

speed Gravity-dependent resistance machines

- adv - safety, convenient to change wts, versatility in force direction, motivation

- disadv - cost, balance not required

Costs of Resistive Equipment

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

Gravity-dependent Resistance Wt Machine

Resistive Equipment (cont’d)

Variable resistance training devices - adv - variable resistance as well as direction of force app,

motivation- disadv - cost, no versatility in speed

Isokinetic devices - Adv - speed specific, vary force during movement (great for

rehab) - Disadv - motivation, cost

Computer-assisted devices - adv - variable resistance & speed, motivation, permanent

record - disadv - cost

Variable Resistance

Weight Machine

ComputerizedExercise Machine

Pneumatic Resistance(air, two-way)

Isokinetic (accomodating) Resistance (one-way)

Hydraulic Resistance

Two-way resistance

Elastic Resistance

Bowflex: Soloflex:

Relevant Questions for Equipment Selection 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-related features?

Exercise Equip of Questionable Value

Devices to vibrate, melt, or massage away fat Stretching, pulling, or pushing devices Wearing or carrying weights Source for exercise equipment:

- Fitnessquest home page- http://www.exerlopers.com/

Exercise equipment research- ISU Dept of OT- Precor home page with scientific studies- Primusweb index- ACE Fitness Home Page

Aerobic Lab Equipment Costs

1. Cybex standard stationary bicycle ($2,500)

2. Precor elliptical exerciser ($3,275) 3. Stairmaster stepmill ($3,200) 4. Stairstep by Unison ($2,200) 5. Woodway treadmill ($6,650) 6. Cybex recumbent bicycle ($2,520) 7. Concept II rowing machine ($680) 8. Ski simulator by cross conditioning

systems ($4,770)

Resistive Ex Lab Equipment Costs

1. Cybex tricep press ($2,550) - Not variable (NV) 2. Cybex rotary torso $2,880) - Decreasing resistance (DR) 3. Cybex modular assist dip/chin ($3,600) - NV 4. Cybex lat pulldown ($1,100) - NV 5. Cybex prone leg curl ($2,170) - DR 6. Cybex seated leg press ($3,960) - Increasing resistance

(IC) 7. Cybex chest press ($2,600) - NV 8. Bench press free weights (bench - 665, bar - 100, 250 lb

wt - 113: Total $878) 9. Cybex row/rear delt ($2,500) - DR 10. Cybex hip adduction ($2,430) - NV

Review of factors in equipment selection

Consider total budget available Consider client characteristics

- Age, gender, experience - Give them what they are interested in, but educate them and

also give them what they need Reflect on what specific exercise modes and types of

resistive equipment are appropriate for fitness programs of clients

Select product models within each product type that are best buys