Assess Before You Prescribe
Replace generic workouts with training matched to individual biomechanics
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 6
- Confidence
- 91%
This decision rule reverses the usual sequence of generic fitness programming. Instead of placing one workout on a board and asking every participant to reproduce it, the coach first observes the individual's biomechanics, limitations, and response to key movements. The assessment produces a specific training target, after which exercise choice, load, range of motion, and progression are customized. The framework also challenges the common injury-first model in which personalization begins only after someone reaches physical therapy. Its preventive version applies expert observation before damage occurs. The trainee's knowledge of their own body remains an important input, especially when a movement feels mechanically incompatible or predictably painful. The output is not an easier workout by default, but a more appropriate path toward strength and resilience.
Origin
Extracted from Habits & Hustle during Henry Abbott and the host's discussion of P3 assessments, generic trainer prescriptions, and customized physical therapy.
Core principles
- 01Bodies do not all execute a movement in the same way
- 02Assessment should precede exercise prescription
- 03Movement quality matters more than copying a standard workout
- 04Known limitations should change exercise selection and loading
- 05Preventive customization is better than waiting for injury
How to run it
- 1
Gather the Person's History
Ask about recurring pain, previous injuries, movements that feel restricted, and exercises that have caused problems. Treat the person's own experience as relevant evidence.
Pro tip Ask for specific movements and sensations rather than accepting broad labels such as being inflexible.
Watch out Do not dismiss a reported mechanical limitation simply because most people can perform the exercise.
- 2
Observe Baseline Mechanics
Watch the person perform relevant low-risk versions of squatting, hinging, landing, balancing, rotating, and other task-specific movements. Identify where control, range, or confidence breaks down.
Pro tip Use video or expert eyes when subtle movement differences matter.
Watch out Stop any test that causes sharp pain or appears unsafe.
- 3
Define the Training Target
Convert the observations into a precise priority such as hip stability, ankle control, rotational capacity, or squat depth tolerance. Avoid vague prescriptions like becoming generally stronger.
Pro tip Choose the limitation most likely to improve safety or unlock useful movement first.
Watch out Do not infer a medical diagnosis beyond your competence.
- 4
Customize the Exercise
Select a variation, load, and range that address the target while respecting current mechanics. Replace an unsuitable standard movement rather than forcing the body into it.
Pro tip Preserve the intended training effect even when changing the exercise form.
Watch out Modification should support progression, not become permanent avoidance without reason.
- 5
Monitor and Progress
Track movement quality, symptoms, and capacity over repeated sessions. Increase demand only when the current variation is controlled and tolerated.
Pro tip Change one major variable at a time so the cause of improvement or aggravation stays clear.
Watch out Do not let short-term performance gains override worsening pain or mechanics.
- 6
Reassess the Prescription
Repeat the baseline movements and update the program according to the new evidence. Refer to an appropriate clinician when the pattern remains painful, unexplained, or resistant to training.
Pro tip Use the same assessment conditions when comparing results.
Watch out A program that was appropriate initially may become stale as the person's mechanics change.
In the wild
A client reports that a heavily loaded deep squat conflicts with her current mechanics and is likely to cause pain. The trainer observes her squat, identifies the limiting range, and uses a controlled box squat with an appropriate load while separately addressing the relevant restriction.
→ The client can train strength without being forced into a movement depth she cannot yet control.
A recreational runner has no acute injury but shows poor single-leg hip control during assessment. Rather than waiting for symptoms, the coach introduces hip-stability work and adjusts running-volume progression.
→ Personalization occurs preventively instead of beginning only after referral to physical therapy.
Common mistakes
Programming for the Average Body
A workout designed for everyone may ignore meaningful differences in mobility, stability, anatomy, history, and movement control.
Ignoring the Trainee's Warning
A coach who insists a limitation is impossible may force a movement the trainee already knows is unsafe or painful for them.
Waiting for Injury to Personalize
Using customized analysis only during rehabilitation misses the opportunity to address risky mechanics beforehand.
Is it for you?
Best for
It is best for trainers and everyday exercisers who need safer exercise selection based on current movement mechanics.
Not ideal for
It is not ideal as permission to avoid every challenging movement without assessment, progression, or professional input.
From the transcript
“you want to do a workout that's designed for you.”
“you want someone with expert eyes looking at your body”
“people know their bodies better than like a stranger does.”
From the episode
Episode 450: Henry Abbott: The Hip Stability Secret for Aging Well + Why ACL Tears Are 8x More Common in Women
Henry Abbott