Thumb IP blocking
Isolated thumb IP flexion/extension with MCP stabilized
Goal
Isolates IP motion to bias FPL and EPL excursion when global thumb motion is too provocative.
Motion taxonomy (reference)
Also called: isolated thumb tip flexion
Muscles — extensor pollicis longus, flexor pollicis longus
Tendons — EPL tendon, FPL tendon
Bones / joints — distal phalanx, thumb IP joint, thumb MCP joint
Indexed benefits: addresses tip stiffness · improves tendon glide · isolates thumb tip control
Common contexts: isolated motion · post-op rehab · thumb stiffness
Best for
- FPL/EPL differential glide
- Thumb tip stiffness
Default dose
8 reps • 3×/day
Avoid when
- Unstable thumb IP
- Acute EPL/FPL repairs without clearance
Measurement targets
- Active IP flexion/extension (visual)
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
- Tiny holds at end range if cleared.
Regressions
- Passive-assist with the index finger only.
Used in
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.
~2–5 min as a focused practice block
8 reps · 3×/day
None required — table or bodyweight only.
Phases 2, 3, 4
Higher load or coordination — scale range and speed.
Avoid if this sounds like you
Unstable thumb IP
Acute EPL/FPL repairs without clearance
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.
Keep momentum without overdoing it
Log a short check-in to protect your streak — even one quality set counts.