Mass grip
Power grasp on large soft ball
Goal
Provides distributed load for power grasp without fine pinch stress.
Motion taxonomy (reference)
Also called: detonator thumb press · full grip putty · power grip · thumb press · thumb to little finger putty · v shape opposition
Muscles — adductor pollicis, flexor digitorum profundus, flexor digitorum superficialis, flexor pollicis brevis, intrinsics, opponens pollicis, thenar muscles
Tendons — flexor tendons, thumb adductor/flexor tendons, thumb opposition tendons
Bones / joints — DIP joints, first metacarpal, little-finger metacarpal, MCP joints, metacarpals, PIP joints, thumb CMC, thumb MCP
Indexed benefits: builds grip strength · improves broad thumb opposition · improves thenar control · strengthens thumb adduction · supports functional grasp · supports functional hold · supports opposition base strength · trains forearm flexors · trains thenar muscles
Common contexts: CMC rehab · grip strengthening · pinch function · pinch stability · return to function · therapy putty work · thumb rehab · thumb strengthening · web-space mobility
Best for
- Global hand strengthening
- Sensory + proprioceptive input
Default dose
10 reps • 5s hold • 2×/day
Equipment
Soft large ball
Avoid when
- Acute carpal tunnel flare with night symptoms
Measurement targets
- Subjective effort %
- Hold time
Setup
- Hold a soft playground ball or large stress ball.
Steps
- 1Wrap fingers and thumb around the ball.
- 2Squeeze to 30–50% effort.
- 3Hold, relax fully.
Cues
- No breath holding.
- Stop if tingling increases.
Common mistakes
- Squeezing to max effort early.
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
- Firmer ball if cleared.
Regressions
- Sponge squeeze instead.
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
10 reps · 5s hold · 2×/day
Soft large ball
Phases 2, 3, 4
Higher load or coordination — scale range and speed.
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.
- Duckbill gripstrength · moderate risk
- Towel wringingstrength · moderate risk
- Towel bunchingstrength · moderate risk
- Wall weight bearingstrength · moderate risk
- Pad-to-side pinchstrength · moderate risk
- Flat pinch (lateral pinch plate)strength · moderate risk
- Tip pinchstrength · moderate risk
- Key pinchstrength · moderate risk
Keep momentum without overdoing it
Log a short check-in to protect your streak — even one quality set counts.