Modalities - Energy Types and Rehabilitation Principles

Physical Agent

A treatment that causes some change to the body.

Thermal Energy

Energy used to increase or decrease tissue temperature.

Electrical Energy

Energy used to depolarize neural tissue to modulate pain, produce muscle contraction, produce local chemical changes by eliciting ion movement, and facilitate tissue or bone healing.

Mechanical Energy

Energy used to create motion in a body segment or area.

Acoustical Energy

Energy that can increase tissue temperature and also produce non-thermal effects.

Electromagnetic Energy

Energy that can increase tissue temperature.

Evidence-Based Practice

Using the best available research evidence to help guide clinical decisions and rehabilitation.

Energy Exchange

The transfer of energy between a modality/source and the body.

Arndt-Schultz Principle

The intensity of an energy applied per unit of time must be appropriate to stimulate the desired physiological response.

Grotthus-Draper Law

Only light that is absorbed by a substance or substances is effective in bringing about a chemical change.

Inverse Square Law

Energy transfer varies inversely with the squared distance between the body and the modality.

Inverse Square Law Example

If the distance between the modality and the body is cut in half, the energy transfer increases fourfold.

Cosine Law

Energy exchange varies with the cosine of the angle between the beam of energy and the body.

Cosine Law Example

For ultrasound applied at 30 degrees, energy exchange is related to cos 30.

Gradient

The difference between the body and the source of energy.

Energy Transfer and Gradient

The rate of energy transfer depends on the magnitude of the difference between the body and the energy source.

Progressive Model for Rehabilitation

The rehabilitation process progresses from examination and controlling symptoms to restoring tissue integrity, movement, strength, motor control, and function.

Step 1 of Progressive Rehabilitation

Physical examination.

Step 2 of Progressive Rehabilitation

Control swelling.

Step 3 of Progressive Rehabilitation

Control pain.

Step 4 of Progressive Rehabilitation

Restore integrity of injured tissue.

Step 5 of Progressive Rehabilitation

Restore range of motion.

Step 6 of Progressive Rehabilitation

Restore control of volitional contractions.

Step 7 of Progressive Rehabilitation

Restore strength and endurance.

Step 8 of Progressive Rehabilitation

Restore reflex reactions.

Step 9 of Progressive Rehabilitation

Restore control of complex movements.

Step 10 of Progressive Rehabilitation

Return to functional activities.

Cryotherapy

The use of cold as a therapeutic intervention.

Cryotherapy Examples

Ice packs, ice massage, and cold bath.

Electrical Stimulation

The use of electrical energy to produce therapeutic physiological effects.

Plyometrics

Exercises using rapid stretch-shortening actions to help restore functional movement and power.

Thermotherapy

The use of heat as a therapeutic intervention.

Thermotherapy Examples

Moist heat and continuous ultrasound.

ROM Exercise

Exercise designed to restore or maintain range of motion.

ROM Exercise Example

Stretching.

Manual Therapy

Hands-on treatment used to influence tissue mobility, joint motion, or muscle/fascial restrictions.

Manual Therapy Examples

Scar massage, joint mobilization, and myofascial release.

Strengthening Exercise

Exercise used to restore muscle strength and capacity.

Strengthening Example

Progressive resistance exercise.

Laser Therapy

A modality using electromagnetic energy for therapeutic purposes.

Rest, Compression, Elevation

Interventions commonly used to manage symptoms such as swelling after injury.

Balance Training

Exercise used to restore balance and neuromuscular control.

Cardiovascular Fitness Training

Exercise used to restore cardiovascular fitness and functional capacity.

Rehabilitation Intervention Selection

Interventions should be selected based on the athlete's injury, healing phase, goals, and available evidence.

Case 1

Athlete with a Grade 1 lateral ankle sprain on day 1 of rehabilitation.

Grade 1 LAS

A Grade 1 lateral ankle sprain; LAS means lateral ankle sprain.

Rehabilitation Planning Questions

Determine the athlete's phase of healing, establish goals, and determine appropriate interventions.

Research in Rehabilitation Programs

Research evidence should be integrated when deciding whether an intervention is effective and appropriate.

Are Modalities Always Needed?

No. Modalities should be selected based on the athlete's needs, evidence, rehabilitation phase, and goals rather than automatically being used.

Why Select a Specific Modality?

A specific modality should be selected because there is a clinical reason and evidence supporting its use.

Efficacy

The ability of an intervention to produce a desired effect under controlled or ideal conditions.

Effectiveness

The ability of an intervention to produce the desired effect in real-world clinical practice.

Reimbursement and Modalities

Reimbursement decisions may be influenced by current evidence supporting or not supporting a modality.

SOAP Notes

A clinical documentation format consisting of Subjective, Objective, Assessment, and Plan.

SMART Goals

Goals that are Specific, Measurable, Achievable, Relevant, and Time-bound.

SMART Goal Purpose

To create clear and measurable rehabilitation goals.

Acute Injury Modalities

Modalities are commonly used to address secondary effects of acute injury when exercise is contraindicated.

Secondary Effects of Acute Injury

Problems such as pain, swelling, and other symptoms that can interfere with rehabilitation.

3 R's of Rehabilitation

Relieve symptoms, Restore deficiencies, and Return to function.

Relieve Symptoms

The first rehabilitation goal is to reduce problems such as pain and swelling.

Restore Deficiencies

The next goal is to restore deficits such as ROM, strength, endurance, and motor control.

Return to Function

The final goal is to return the athlete to functional activities and sport.

Overall Modality Process

First identify the phase of healing, then create SMART goals,