MCP extension blocked isometric
Resisted isometric MCP extension with PIP flexed (intrinsic plus line)
Goal
RIM in intrinsic-plus biases lumbrical–interossei balance for knuckle control.
Motion taxonomy (reference)
Also called: RIM · intrinsic plus iso
Best for
- Intrinsic-plus stability
- Knuckle extension control
Default dose
5 reps • 2 sets • 6s hold • 2×/day
Avoid when
- Acute boutonnière injury
- Extensor lag from repair
Measurement targets
- Hold seconds
- Joint line soreness 0–10
Setup
Steps
- 1Use the opposite palm on the dorsum of the proximal phalanges.
- 2Try to extend MCPs further while blocked.
- 3Relax fully.
Stop if you feel
Stop rules
- Sharp pain (≥ 4/10)
- Increasing swelling during or after
- New or worsening numbness or tingling
- Color change in fingers (pale, blue, red)
- Wound opens, drains, or feels hot
- Next morning is worse than the day before
Progressions
- Therapist-taped reminder for PIP position if needed.
Regressions
- Visualize only; no measurable force.
Used in(2 guided demos)
Search the exercise library with this motion's clinical label for additional guided drills that may match your plan.
What to do next — not a dead end
Suggestions use body region, goal, motion type, and allowed phases — not your medical record. After surgery or a flare, follow your clinician first.
~1 min if held as written
5 reps · 2 sets · 6s hold · 2×/day
None required — table or bodyweight only.
Phases 3, 4
Higher load or coordination — scale range and speed.
Avoid if this sounds like you
Acute boutonnière injury
Extensor lag from repair
Reread best-for context ↑Next best movements
Later phase or richer progression when you are ready.
Prerequisite / gentler lane
Same region and intent — usually earlier phase or lower risk.
Commonly paired with
Different primary goal, same region — typical mixed sessions.
Related movements
Similar mechanics, goals, or anatomy.
- Wall weight bearingstrength · moderate risk
- Mass gripstrength · moderate risk
- Towel wringingstrength · moderate risk
- Towel bunchingstrength · moderate risk
- Duckbill gripstrength · moderate risk
- Finger spread wall isometricstrength
- Lumbrical pressstrength · moderate risk
- Pad-to-side pinchstrength · moderate risk
Guided exercises that use this
Step-by-step sessions that embed this movement pattern.
Keep momentum without overdoing it
Log a short check-in to protect your streak — even one quality set counts.