Therapy Dosage Planner
Track your therapy dosage with our free sports calculator. Get personalized stats, rankings, and performance comparisons.
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist
Therapy Dosage Planner
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Formula: Weekly Dose = Session Minutes x Sessions/Week | Intensity-Weighted Dose = Weekly Dose x (Intensity/10) | Adjusted Dose = Weekly Dose x Recov…
Worked example — Weekly Dose: 180 min | Adjusted: 108 min | 48 total sessions | Load Rating: Moderate
Formula
Weekly Dose = Session Minutes x Sessions/Week | Intensity-Weighted Dose = Weekly Dose x (Intensity/10) | Adjusted Dose = Weekly Dose x Recovery Factor
Weekly Dose calculates raw therapy volume. Intensity-Weighted Dose adjusts for exercise difficulty. Recovery Factor reduces dose for higher severity injuries (0.6 for severe, 0.8 for moderate, 1.0 for mild). Calories per session estimate uses metabolic equivalent calculations based on body weight and intensity.
Worked Examples
Example 1: Post-ACL Reconstruction Rehabilitation
Problem:A 75 kg patient recovering from ACL surgery (severity 8/10) plans 45-minute sessions, 4 times per week, at intensity 4/10 for 12 weeks.
Solution:Weekly dose = 45 x 4 = 180 minutes/week Intensity-weighted dose = 180 x (4/10) = 72 minutes Recovery factor (severity 8) = 0.6 Adjusted weekly dose = 180 x 0.6 = 108 minutes Total sessions = 4 x 12 = 48 sessions Total dose = 180 x 12 = 2,160 minutes Calories per session = (45/60) x 75 x 3.5 x 0.4 = 78.75 kcal
Result:Weekly Dose: 180 min | Adjusted: 108 min | 48 total sessions | Load Rating: Moderate
Example 2: Sports Massage Therapy Schedule
Problem:An 85 kg athlete with mild muscle strain (severity 3/10) plans 60-minute sessions, 3 times per week, at intensity 6/10 for 6 weeks.
Solution:Weekly dose = 60 x 3 = 180 minutes/week Intensity-weighted dose = 180 x (6/10) = 108 minutes Recovery factor (severity 3) = 1.0 Adjusted weekly dose = 180 x 1.0 = 180 minutes Total sessions = 3 x 6 = 18 sessions Total dose = 180 x 6 = 1,080 minutes Calories per session = (60/60) x 85 x 3.5 x 0.6 = 178.5 kcal
Result:Weekly Dose: 180 min | Adjusted: 180 min | 18 total sessions | Load Rating: Moderate
Frequently Asked Questions
What is a therapy dosage planner and why is it important?
A therapy dosage planner is a structured tool that calculates the optimal volume, intensity, and frequency of therapeutic exercise sessions needed for rehabilitation. Just like medication requires precise dosing, physical therapy must balance enough stimulus to promote healing without overloading injured tissue. The planner considers session duration, frequency per week, exercise intensity, injury severity, and total program length to generate a progressive treatment plan. Research consistently shows that properly dosed therapy programs achieve 30 to 40 percent faster recovery outcomes compared to ad hoc approaches where volume and intensity are not systematically managed.
How do I determine the right intensity level for therapy sessions?
Therapy intensity should be determined using a combination of perceived exertion scales, pain monitoring, and functional capacity assessments. The modified Borg scale from 1 to 10 is commonly used, where 1 represents minimal effort and 10 represents maximum exertion. For early-stage rehabilitation, intensities of 3 to 4 are typically appropriate to avoid aggravating the injury. Mid-stage rehab usually operates at 5 to 7 intensity, focusing on progressive loading. Late-stage rehab and return-to-sport phases may reach 8 to 9 intensity. Pain should generally stay below 4 out of 10 during exercises, and any sharp or increasing pain signals that intensity needs to be reduced immediately.
What is the optimal number of therapy sessions per week?
The optimal session frequency depends on injury type, severity, recovery stage, and individual healing capacity. Acute injuries in early rehabilitation typically benefit from 5 to 6 sessions per week at low intensity to maintain range of motion and reduce swelling. Moderate injuries in the mid-rehabilitation phase generally respond best to 3 to 4 sessions per week, allowing adequate recovery between sessions for tissue adaptation. Chronic conditions and maintenance programs may only require 2 to 3 sessions per week. Research indicates that exceeding optimal frequency can lead to overtraining and delayed healing, while insufficient frequency may result in deconditioning. Your therapist should adjust frequency based on your response to treatment.
How does injury severity affect the therapy dosage plan?
Injury severity directly determines starting intensity, progression rate, and total program duration for rehabilitation. Mild injuries rated 1 to 3 on a severity scale can typically begin therapy at moderate intensity and progress relatively quickly over 4 to 6 weeks. Moderate injuries rated 4 to 6 require a more conservative starting point with gradual intensity increases over 8 to 12 weeks. Severe injuries rated 7 to 10, including surgical repairs and significant tears, demand very low starting intensities with slow progression over 12 to 24 weeks or longer. The recovery factor applied to weekly dosage calculations decreases as severity increases, reflecting the reduced tissue tolerance of more seriously injured structures.
What is the weekly therapy dose and how is it calculated?
The weekly therapy dose is calculated by multiplying session duration in minutes by the number of sessions per week, giving total therapeutic minutes per week. This raw volume is then modified by intensity level to produce an intensity-weighted dose that more accurately reflects the actual physiological stimulus applied to healing tissues. For example, three 45-minute sessions at intensity 7 equals 135 minutes of raw weekly dose and 94.5 intensity-weighted minutes. Research suggests that most musculoskeletal conditions respond optimally to 150 to 300 intensity-weighted minutes per week during active rehabilitation phases. Doses below this range may produce insufficient stimulus, while doses above 400 may exceed tissue adaptation capacity.
How should therapy intensity progress over a rehabilitation program?
Therapy intensity should follow a graduated progression model that starts conservatively and increases systematically as tissue healing and functional capacity improve. The general principle is to begin at approximately 50 to 60 percent of the target intensity during the first two weeks, allowing the body to adapt to the therapeutic exercises. From weeks 3 to 5, intensity can increase by 5 to 10 percent per week as pain and swelling responses are monitored. Weeks 6 to 8 typically see the largest intensity gains as tissue remodeling advances. The final phase should approach sport or activity specific intensities of 85 to 95 percent. Any setback in symptoms should trigger a temporary 20 to 30 percent intensity reduction followed by a more conservative re-progression.
What role does body weight play in therapy dosage calculations?
Body weight influences therapy dosage calculations primarily through its effect on energy expenditure, joint loading, and exercise difficulty during rehabilitation sessions. Heavier individuals expend more calories during weight-bearing exercises and place greater mechanical stress on healing joints and tissues. This means that a 100-kilogram person performing identical exercises to a 60-kilogram person is actually receiving a higher relative physiological dose. Body weight also affects exercise selection, as non-weight-bearing and aquatic exercises may be more appropriate for heavier patients in early rehabilitation stages. The caloric expenditure estimation helps patients understand their nutritional needs during recovery, as inadequate calorie intake can impair tissue healing and recovery.
How many rest days should I include in my therapy schedule?
Rest days are essential components of any rehabilitation program because tissue adaptation and strengthening occur during recovery periods, not during the exercise sessions themselves. For most rehabilitation programs, a minimum of 1 to 2 rest days per week is recommended even during intensive early-stage rehab. Active recovery days where patients perform gentle stretching or walking at very low intensity can replace complete rest days for some conditions. The optimal number of rest days increases with exercise intensity and injury severity. Athletes recovering from surgery should follow the 48-hour rule, allowing at least 48 hours between sessions targeting the same muscle group or joint. Insufficient rest can lead to overuse complications, increased inflammation, and paradoxically slower healing outcomes.
What is the difference between therapy volume and therapy load?
Therapy volume refers to the total quantity of exercise performed, typically measured in minutes, sets, repetitions, or total sessions over a given period. Therapy load, also called intensity-weighted dose, accounts for both the volume and the difficulty or intensity of the exercises performed. Two patients could have identical therapy volumes of 180 minutes per week, but vastly different therapy loads if one works at intensity 4 and the other at intensity 8. Load is the more clinically relevant metric because it reflects the actual physiological stress placed on healing tissues. Progressive overload, the gradual increase in therapy load over time, is the fundamental principle driving tissue adaptation and functional improvement during rehabilitation.
When should I modify my therapy dosage plan?
You should modify your therapy dosage plan whenever there are meaningful changes in pain levels, functional capacity, or recovery response between sessions. If pain consistently exceeds 5 out of 10 during or after therapy sessions, reduce intensity by 20 percent and reassess after one week. If you experience no muscle soreness or challenge during sessions, it may be time to increase intensity by 10 percent. Major life events like illness, travel, or significant stress may require temporary dosage reductions. Regular reassessment every 2 to 4 weeks with objective functional measures like range of motion, strength testing, and balance assessments provides data-driven guidance for dosage modifications. Always consult your treating therapist before making significant changes to your rehabilitation program.
References
Reviewed for accuracy by Sher, Sports Science & Nutrition Specialist · Editorial policy
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